Exhibit 13.1


Regulated and Non-Regulated Customers                                                            page 12

                                                                                                  NON

DISTRICT NAME            INCLUDING                                              REGULATED      REGULATED
                                                                                            
CALIFORNIA

Bakersfield              O&M contracts for the City of Bakersfield                 56,700         24,900
                         and Spicer City and Rancho Verdugo MWC

Bear Gulch               Atherton, Woodside, Portola Valley, portions
                         of Menlo Park and City of Menlo Park                      17,500          4,000
                         service contract
Chico+                   Hamilton City                                             22,800
Dixon                                                                               2,800
East Los Angeles         O&M contracts for cities of Commerce and                  26,400          2,700
                         Montebello

Hawthorne                15-year lease-- full service water operations              6,100
Hermosa-Redondo+         a portion of Torrance                                     25,400
King City+                                                                          2,200
Livermore                O&M contracts for Castlewood Country                      16,500            400
                         Club and Crane Ridge MWC
Los Altos                portions of Cupertino, Los Altos Hills,                   18,300
                         Mountain View and Sunnyvale
Marysville+                                                                         3,700
Mid-Peninsula            San Mateo and San Carlos                                  35,700
Oroville                                                                            3,500
Palos Verdes+            Palos Verdes Estates, Rancho Palos Verdes,                23,700
                         Rolling Hills Estates and Rolling Hills
Salinas                  O&M contracts for Country Meadows                         25,600            300
                         MWC and Spreckels Water Co.
Selma                                                                               5,100
South San Francisco      Colma and Broadmoor                                       16,200
Stockton                                                                           41,600
Visalia+                 four O&M contracts                                        28,600          1,100
Westlake                 a portion of Thousand Oaks                                 6,900
Willows+                                                                            2,300
                         Subtotal                                                 381,500         39,500

WASHINGTON

Harbor                   numerous O&M contracts                                     9,300          1,700
South Sound              numerous O&M contracts                                     2,700          1,100
                         Subtotal                                                  12,000          2,800

                         Current Total                                            393,500         42,300


                                                                                                      32



DOMINGUEZ*

Antelope Valley          Fremont Valley, Lake Hughes, Lancaster                     1,300            300
                         and Leona Valley

Dominguez                Carson and portions of Compton, Harbor                    32,500
                         City, Long Beach and Torrance
Kern River Valley        Bodfish, Kernville, Lakeland, Mountain                     4,100            700
                         Shadows, Onyx, Squirrel Valley, South
                         Lake and Wofford Heights
Redwood Valley           Lucerne, Duncans Mills and Guerneville                     1,900

                         Subtotal                                                  39,800          1,000

                         Total with Dominguez                                     433,300         43,300


                                                                                                 Page 13
MAP OF SERVICE TERRITORIES

This page is a map of the Western United States with Washington,  California and New Mexico highlighted.
The  California  Water  Service  Company,  Washington  Water  Service  Company  and  Dominguez  Services
Corporation service areas noted. In New Mexico, a contract operation is noted near Santa Fe.

                                                                                                 Page 14

Financial Section (INDEX)


Ten-year Financial Review                                                                        15

Management's Discussion and Analysis of Financial Condition
and Results of Operations                                                                        16

Consolidated Balance Sheet                                                                       23

Consolidated Statement of Income                                                                 24

Consolidated Statement of Common Stockholders' Equity                                            25

Consolidated Statement of Cash Flows                                                             26

Notes to Consolidated Financial Statements                                                       27

Independent Auditors' Report                                                                     35

Corporate Information                                                                            36


                                                                                                      33



Board of Directors                                                              inside back cover

Officers                                                                        inside back cover




Ten-Year Financial Review                                                                        Page 15

Dollars in thousands, except common share data

                             1999       1998     1997      1996      1995      1994      1993      1992     1991     1990
Summary of Operations:
Operating revenue
   Residential             $150,326  $139,018  $146,246  $136,747  $122,275  $117,032  $113,445  $103,644  $ 89,108  $ 91,595
   Business                  34,219    31,591    32,916    30,924    28,230    27,023    25,247    23,670    20,759    20,910
   Industrial                 6,947     6,239     6,282     6,150     5,836     5,478     5,123     4,925     4,490     5,145
   Public authorities         9,501     8,368     9,636     9,023     8,149     7,995     7,397     6,892     5,734     6,412

   Other                      5,447     4,443     3,267     2,709     3,126     2,087     2,475     2,525     8,676     1,782
   Total op. revenue        206,440   189,659   198,347   185,553   167,616   159,615   153,687   141,656   128,767   125,844
Operating expenses          175,830   159,120   163,431   154,849   141,950   133,821   125,729   117,646   104,372   102,350
Interest expense, other
  income and expenses,
  net                        10,691    11,603    11,180    11,285    10,651    11,091    12,386    11,276    10,204     8,963
   Net income              $ 19,919  $ 18,936  $ 23,736  $ 19,419  $ 15,015  $ 14,703  $ 15,572  $ 12,734  $ 14,191  $ 14,531

Common Share Data*
Earnings per share         $   1.53  $   1.45  $   1.82  $   1.49  $   1.16  $   1.21  $   1.32  $   1.08  $   1.20  $   1.23
Dividends declared         $  1.085  $   1.07  $  1.055  $   1.04  $   1.02  $   0.99  $   0.96  $   0.93  $   0.90  $   0.87
Dividend payout ratio            71%       74%       58%       70%       88%       82%       73%       86%       75%       71%
Book value                 $  13.70  $  13.27  $  12.84  $  12.10  $  11.58  $  11.36  $  10.68  $  10.31  $  10.16  $   9.83
Market price at year-end      30.31     31.31     29.53     21.00     16.38     16.00     20.00     16.50     14.00     13.38
Common shares
   outstanding at year-
   end (in thousands)        12,936    12,936    12,936    12,936    12,855    12,811    11,694    11,694    11,694    11,694
Return on average common
   stockholders' equity        11.4%     11.3%     14.7%     12.8%     10.3%     10.8%     12.3%     10.5%     11.8%     12.5%
Long-term debt
   interest coverage            3.5       3.5       4.1       3.6       3.1       3.2       3.1       3.0       3.2       3.6

Balance Sheet Data

Net utility plant          $515,354  $489,017  $469,897  $452,441  $430,636  $415,747  $399,088  $381,683  $356,172  $331,352
Utility plant
   expenditures              44,493    35,878    33,931    36,820    28,409    29,117    29,445    36,275    34,994    27,402
Total assets                587,618   560,508   542,783   522,870   507,732   471,855   455,055   411,479   400,698   375,746
Long-term debt including
  current portion           159,223   141,401   142,013   143,840   147,062   130,983   131,199   123,445   104,494   105,948

Capitalization ratios:
   Common stockholders'
     equity                    52.1%     54.2%     53.3%     51.5%     49.7%     52.0%     48.1%     48.7%     52.4%     51.3%
   Preferred stock              1.0%      1.1%      1.1%      1.1%      1.2%      1.2%      1.3%      1.4%      1.5%      1.5%
   Long-term debt              46.9%     44.7%     45.6%     47.4%     49.1%     46.8%     50.6%     49.9%     46.1%     47.2%

Other Data

Water production (million gallons)
   Wells                     57,934    51,139    57,652    54,457    50,688    51,352    48,012    52,909    49,692    52,272
   Purchased                 52,340    49,436    53,190    51,700    49,068    49,300    48,089    40,426    36,686    45,431
     Total water

       production           110,274   100,575   110,842   106,157    99,756   100,652    96,101    93,335    86,378    97,703

Metered customers           322,478   317,178   312,732   308,455   298,730   295,831   290,513   286,465   282,377   278,639
Flat-rate customers          77,091    77,340    77,649    77,961    78,099    79,103    81,360    82,566    82,979    81,721
   Customers at

     year-end               399,569   394,518   390,381   386,416   376,829   374,934   371,873   369,031   365,356   360,360
New customers added           5,051     4,137     3,965     9,587     1,895     3,061     2,842     3,675     4,996     1,251
Revenue per customer       $    517  $    481  $    508  $    480  $    445  $    426  $    413  $    384  $    352  $    349


                                                                                                                           34



Utility plant per customer    1,845     1,764     1,694     1,633     1,582     1,520     1,460     1,399     1,320     1,247
Employees at year-end           708       689       679       663       660       653       642       637       618       605

<FN>
            *Common share data is restated to reflect the effective two-for-one stock split on December 31, 1997.
</FN>


                                                                         Page 16

Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations

California  Water  Service  Group  (Company)  is a holding  company  with  three
operating  subsidiaries,  California  Water  Service  Company (Cal  Water),  CWS
Utility  Services  (Services) and Washington  Water Service Company  (Washington
Water).  Cal Water and Washington  Water are regulated public  utilities.  Their
assets and operating  revenues  currently  make up the majority of the Company's
assets and  revenues.  Services  provides  non-regulated  water  operations  and
related services to other private  companies and  municipalities.  The following
discussion  and  analysis  provides  information  regarding  the Company and its
assets, operations and financial condition.

Forward-Looking Statements

This  annual  report,   including  the  Letter  to  Stockholders,   Management's
Discussion and Analysis and other sections,  contains forward-looking statements
within the meaning of the federal  securities laws. Such statements are based on
currently  available  information,   expectations,  estimates,  assumptions  and
projections,  and  management's  judgment  about the Company,  the water utility
industry and general economic conditions. Such words as expects, intends, plans,
believes,  estimates,  anticipates  or  variations  of  such  words  or  similar
expressions   are   intended  to  identify   forward-looking   statements.   The
forward-looking  statements  are not  guarantees of future  performance.  Actual
results  may  vary  materially  from  what  is  contained  in a  forward-looking
statement.  Factors  which  may  cause  a  result  different  than  expected  or
anticipated include regulatory commission decisions, new legislation,  increases
in  suppliers'  prices,  changes  in  environmental   compliance   requirements,
acquisitions,  changes in customer  water use patterns and the impact of weather
on  operating  results.  The Company  assumes no  obligation  to provide  public
updates on forward-looking statements.

Business

Cal Water is a public utility supplying water service to 387,600 customers in 60
California  communities  through 21 separate  water  systems or  districts.  Cal
Water's 20 regulated systems,  which are subject to regulation by the California
Public  Utilities  Commission  (CPUC),  serve 381,500  customers as shown on the
enclosed map. An additional  6,100 customers  receive service through a lease of
the City of Hawthorne's  water system,  which is not subject to CPUC regulation.
Cal Water  derives  non-regulated  income  from  contracts  with  other  private
companies  and  municipalities  to operate  water  systems and  provide  billing
services to 33,400  customers.  It also leases  communication  antenna sites and
operates two reclaimed water systems.

         Washington  Water's utility  operations are regulated by the Washington
Utilities  and  Transportation  Commission  (WUTC).  Washington  Water  provides
domestic water service to 12,000 customers through two operating  districts near
Tacoma and Olympia.  An additional  2,800  customers are served under  operating
agreements with private


                                                                              35



owners.  Refer to the separate  section  titled  "Washington  Acquisitions"  for
further information concerning Washington Water.

         Rates  and  operations  for  regulated  customers  are  subject  to the
jurisdiction of the respective  state's regulatory  commission.  The commissions
require  that  water  rates  for  each  regulated   district  be   independently
determined. Rates for the City of Hawthorne system are established in accordance
with an operating agreement and are subject to ratification by the City Council.
Fees for other operating  agreements are based on contracts negotiated among the
parties.

Results of Operation

Restatement  During 1999,  the Company  issued 316,472 shares of common stock in
exchange for all of the  outstanding  shares of Harbor  Water  Company and South
Sound  Utility  Company.  Both  acquisitions  were  accounted for as poolings of
interests.  Financial  statements  for the current and prior  periods  have been
restated to include the accounts of both companies.

Earnings  and  Dividends  Net  income  in  1999  was  $19,919,000,  compared  to
$18,936,000  in 1998 and  $23,736,000  in 1997.  Earnings  per common share were
$1.53 in 1999,  $1.45 in 1998 and $1.82 in 1997.  Net  income and  earnings  per
share in 1997 were the highest levels ever achieved by the Company. The weighted
average  number  of common  shares  outstanding  in each of the three  years was
12,936,000.

     At its January 1999  meeting,  the Board of Directors  increased the common
     stock  dividend rate for the 32nd  consecutive  year.  1999 also marked the
     55th consecutive year that a dividend had been paid on the Company's common
     stock.  The annual  dividend  paid in 1999 was $1.085,  an increase of 1.4%
     over the 1998 rate of $1.07 per  share,  which in turn was an  increase  of
     1.4% from the 1997  dividend of $1.055 per share.  The  dividend  increases
     were based on projections that the higher dividend could be sustained while
     still providing the Company with adequate financial  flexibility.  Earnings
     not paid as dividends are reinvested in the business.  The dividend  payout
     ratio was 71% in 1999,  74% in 1998 and 58% in 1997,  an average of 67% for
     the three-year period.

                                                                         Page 17

Operating  Revenue Operating  revenue,  including revenue from City of Hawthorne
customers,  was $206.4 million, $16.8 million or 9% more than the $189.7 million
recorded  last  year.  Revenue  in 1997 was $198.3  million.  Operating  revenue
exceeded  $200  million  for the first  time in 1999.  The  source of changes in
operating revenue were:

      dollars in millions                           1999        1998        1997

Customer water usage                               $11.8      $(12.6)      $ 3.9
General and step rate increases                      3.0         1.9         6.4
Offset rate increases - water production costs       0.2         0.2         0.2
Usage by new customers                               1.8         1.9         2.3
Net change                                         $16.8      $ (8.6)      $12.8
Average revenue per customer                       $ 517      $  481       $ 508


                                                                              36



Average metered customer usage (ccf)                 305         284         315
New customers added                                5,000       4,100       4,000

Weather  in the first  half of 1999 was  normal,  while in the prior year it was
cool and wet; as a result,  customer  usage and  revenue  were higher this year.
Third-quarter weather in both years was normal.  Fourth-quarter 1999 weather was
mild and drier than 1998,  causing an increase in customer usage and an increase
in revenue. The year-end customer count was 399,600, an increase of 1.3%.

         During the first half of 1998, weather in our service areas was wet and
cool, very much the reverse of 1997's favorable weather pattern.  Weather in the
second half of 1998 returned to a more normal  pattern.  However,  the wet, cool
weather in the early part of the year resulted in an overall 9% decrease in 1998
water usage,  negatively  impacting revenue. The year-end customer count in 1998
was 394,500, a 1.1% increase.

         Rainfall for the 1996-97 season was  concentrated  in December 1996 and
January 1997,  then virtually  ceased.  Average  consumption per metered account
reached a record level due to dry and warm summer months.  The customer count in
1997 increased 1.0% to 390,400.

Operating and Interest  Expenses  Operating  expenses,  including  those for the
Hawthorne  operation,  were $175.8  million in 1999,  $159.1 million in 1998 and
$163.4 million in 1997.

     Wells  provided  52.4% of water  requirements  in 1999 and purchased  water
     provided  47.2%,  with 0.4% obtained from a surface  supply.  In 1998,  the
     corresponding  percentages were 50.6%,  48.9% and 0.5%, and in 1997, 51.8%,
     47.8% and 0.4%.  The  table  below  provides  information  regarding  water
     production costs, which includes purchased water,  purchased power and pump
     taxes:

    dollars in millions                             1999       1998       1997

Purchased water                                    $58.1      $50.4       $52.2
Purchased power                                     13.0       11.4        12.7
Pump taxes                                           4.5        3.8         4.3
Total water production costs                       $75.6      $65.6       $69.2
Change from prior year                                15%       (5)%          2%
Water production (billion gallons)                   110        101         111
Change from prior year                                10%       (9)%          5%

         The year-to-year  water production cost changes were influenced by each
year's predominant weather pattern. In each of the three years,  purchased water
expense,  the largest  component of annual  operating  expense,  was affected by
wholesale  suppliers' rate increases.  Water production costs in 1999 reflect an
increase in customer usage and  significant  purchased water price increases for
the San Francisco  Peninsula  districts,  where the wholesale  supplier's  rates
increased 37%.

                                                                         Page 18

         Production  levels in 1998  decreased  from 1997 due to lower  customer
usage  in  response  to  weather  conditions.   Despite  some  wholesaler  price
increases, overall water


                                                                              37



production  expenses declined.  Well production  decreased due to the decline in
water sales and because several wells were out of service for maintenance.  With
reduced well production, purchased power and pump tax expenses declined.

         In 1997,  nonrecurring  refunds totaling $2.5 million received from two
wholesale  water  suppliers  reduced  purchased  water expense.  Well production
increased 6% in 1997 because of  increased  demand,  causing an increase in pump
taxes and purchased power costs.

         Employee  payroll and benefits  charged to operations  and  maintenance
expense was $38.4  million in 1999,  $34.9  million in 1998 and $34.1 million in
1997.  The increases in payroll and related  benefits are  attributable  to wage
increases  effective at the start of each year and additional  hours worked.  At
year-end 1999, 1998 and 1997, there were 708, 689 and 679 employees.

         Income tax expense was $12.2 million in 1999, $10.8 million in 1998 and
$14.1  million in 1997.  The changes in taxes are generally due to variations in
taxable income. There is no state income tax in Washington.

         Long-term debt interest expense  increased $1.0 million in 1999 because
of the  issuance of Series B, 6.77% senior  notes in March.  Long-term  interest
costs  decreased  $0.4  million  in 1998  and  $0.3  million  in 1997 due to the
retirement  of Series K bonds in  November  1996 and Series L bonds in  November
1997,  annual  sinking fund  payments each year and the absence of new long-term
financing.

         Interest expense from short-term bank borrowings in 1999 decreased $0.4
million.  Short-term  borrowings  were  reduced  after the issue of the Series B
senior  notes and by  strong  cash flow  from  operations.  In 1998,  short-term
interest  expense was $0.7  million  greater than in 1997.  In 1997,  short-term
interest expense was $0.3 million more than in the prior year. Interest coverage
of long-term  debt before  income taxes was 3.5 times in 1999 and 1998,  and 4.1
times in 1997.  There was $13.5 million in  short-term  borrowings at the end of
1999, and $22.5 million at the end of 1998.

Other  Income Other  income is derived  from  management  contracts by which the
Company operates  private and  municipally-owned  water systems,  agreements for
operation  of two  reclaimed  water  systems,  contracts  for meter  reading and
billing  services to various  cities,  leases of  communication  antenna  sites,
surplus  property  sales,  other  nonutility  sources and interest on short-term
investments.  Total other income was $2.7 million in 1999,  $1.3 million in 1998
and $1.4 million in 1997.  During 1999,  $1.3  million in pretax  revenues  were
realized as part of the Real Estate  Program that is described in more detail in
"Liquidity and Capital Resources." Income from the various operating and billing
contracts,  excluding  short-term  interest income, was $2.5 million in 1999 and
$1.3 million in 1998 and 1997.

Rates and Regulation

The Company's regulatory staff completed a review of 14 Cal Water districts that
were  eligible for general rate  application  filings in 1999.  Based on current
earnings levels,  projected expense increases and expected capital expenditures,
a  determination  was made  that no  general  rate  increase  applications  were
necessary.  During  2000,  eligible  districts  will  again be  reviewed.  It is
anticipated that general rate application  filings will be made in mid-year with
CPUC decisions expected in late spring 2001.

         In May 1999,  the CPUC  authorized  rate  increases  in four  districts
serving about 25% of Cal Water's total customers. The applications were filed in
July 1998.


                                                                              38



Subsequently,  the Company and CPUC staff agreed to a stipulated settlement. The
decision is estimated to generate  $4,095,000  in new revenue  during the twelve
months  following its mid-June  effective date. The decision  authorized a 9.55%
return on equity, providing $1.9 million in additional revenue. In addition, the
decision provided another $2.2 million in revenue for environmental  compliance,
specific  capital budget  expenditures  and recovery of General Office expenses.
The $2.2 million is not reflected in the 9.55% return on equity calculation.

         CPUC  decisions  were  received  in  July  1998  for the  general  rate
applications filed in July 1997.  Additional annual revenue from these decisions
is expected  to total  $299,000  in 1998,  $267,000 in 1999 and  $121,000 in the
years 2000 and 2001. In a variance from its past practice, future rate increases
for  operating  costs and capital  requirements  over the next five years in the
Oroville and Selma districts are tied to changes in a price index.  The decision
maintained the ROE at 10.35%.

         In 1997, the CPUC's general rate application  decisions  granted an ROE
of 10.35% and additional revenue of $2.4 million.

         No rate  applications  were filed for the Washington  operations during
1999.  The most recent  authorized  rate of return was 11.1%,  granted in a 1998
decision.  General rate  application  filings for both districts are expected in
2000.

Water Supply                                                             Page 19

The Company's  source of supply varies among its  operating  districts.  Certain
districts obtain all of their supply from wells, some districts  purchase all of
their supply from wholesale  suppliers and other  districts  obtain their supply
from a combination of wells and purchased sources.  Historically,  about half of
the water is provided from wells and about half is purchased.

         Generally,  between mid-spring and mid-fall, little precipitation falls
in  the  California   service  areas.  The  Washington   service  areas  receive
precipitation  in all seasons.  Water demand is highest  during the warm summers
and lowest in the cool winters. Rain and snow during the winter months replenish
underground  water basins and fill  reservoirs,  providing  the water supply for
subsequent delivery to customers. To date, snow and rainfall accumulation during
the  1999-2000  water year has been less than  normal,  but the prior four years
exceeded  normal  levels.  Water storage in state  reservoirs at the end of 1999
exceeds  historic  amounts.  The  Company  believes  that its  supply  from both
underground  aquifers and purchased  sources should be adequate to meet customer
demand during 2000.

Environmental Matters

The  Company is  subject  to  regulations  of the  United  States  Environmental
Protection  Agency (EPA),  state health  service  departments  and various local
health departments  concerning water quality matters.  It is also subject to the
jurisdiction  of  various  state  and  local  regulatory  agencies  relating  to
environmental  matters,  including handling and disposal of hazardous materials.
The Company  believes it is in compliance with all requirements set forth by the
various agencies.

         The Safe  Drinking  Water  Act was  amended  in 1996 to  provide  a new
process for the EPA to select and regulate waterborne contaminants.  The EPA can
now regulate only  contaminants that are known or likely to occur at levels that
would  pose a risk to  public


                                                                              39



health when such regulation  would provide a meaningful  opportunity to reduce a
health risk.  New drinking  water  regulations  will be based  primarily on risk
assessment and measurement of cost/benefit considerations for minimizing overall
health risk.  Over 90 contaminants  for possible  regulation have been listed by
the EPA and the list must be updated  every five years.  Also,  every five years
the EPA must  select at least five listed  contaminants  and  determine  if they
should be regulated.

         The Company has an established water supply monitoring  program to test
for  contaminants  as mandated  by the EPA.  As  necessary  or  required,  water
treatment is added to provide  disinfection for water extracted from underground
sources.  The Company  also owns and  operates  three  surface  water  treatment
plants. The cost of treatment is being recovered in customer rates as authorized
by the regulatory  authorities.  Water  purchased  from  wholesale  suppliers is
treated before delivery to the Company's systems.

         Enforcement  of the EPA standards is the  responsibility  of individual
states, which could impose more stringent  regulation.  In addition to the EPA's
requirements, various regulatory agencies could require increased monitoring and
possibly additional treatment of water supplies.  The Company intends to request
recovery for any additional treatment costs through the ratemaking process.

Liquidity and Capital Resources

Liquidity  The  Company's  liquidity  is  provided  by bank  lines of credit and
internally  generated  funds.  The Company and Cal Water have a $50 million bank
line of credit.  The Company's portion is $20 million and Cal Water's portion is
$30 million.  The Company's  $20 million  portion may be drawn on for use by the
Company,   including  funding   operations  of  either  of  its  two  California
subsidiaries. Cal Water's $30 million portion can be used solely for purposes of
the regulated  utility.  Washington Water has loan commitments from two banks to
meet its  operating  and capital  equipment  purchase  requirements.  Generally,
short-term  borrowings under the commitments are converted annually to long-term
borrowings  with  repayment  terms  tied to system and  equipment  acquisitions.
Additional  information  regarding the bank borrowings is presented in Note 6 to
the  Consolidated  Financial  Statements.  Internally  generated funds come from
retention  of earnings  not paid out as  dividends,  depreciation  and  deferred
income taxes.

         Because  of the  seasonal  nature of the water  business,  the need for
short-term  borrowings under the line of credit  generally  increases during the
first six months of the year when water  sales are lower.  With  greater  summer
usage and increased billings comes increased cash flow from operations, allowing
bank borrowings to be repaid.

         The Company  believes  that  long-term  financing  is  available  to it
through equity and debt markets.  Standard & Poor's and Moody's have  maintained
their ratings of the Cal Water's first mortgage bonds at AA- and Aa3.  Long-term
financing,  which includes common stock, first mortgage bonds,  senior notes and
other debt securities,  has been used to replace short-term  borrowings and fund
construction.  Developer  contributions  in aid of  construction  and refundable
advances for  construction  are also  sources of funds for various  construction
projects.

                                                                         Page 20

         In March 1999,  Cal Water  completed its first  long-term  financing in
four years when Series B, 6.77%,  30-year senior notes were issued. Prior to the
Series B issue,


                                                                              40



operating  and  capital  requirements  were  met by  borrowings  under  the bank
short-term line of credit and by internally generated funds.

         In 1998,  the  Company  introduced  a Dividend  Reinvestment  and Stock
Purchase Plan (Plan),  replacing the existing plan. Under the Plan, stockholders
may reinvest  dividends to purchase  additional  Company common stock.  The Plan
also allows existing  stockholders  and other  interested  investors to purchase
Company common stock through the transfer  agent.  Shares  required for the Plan
may be purchased on the open market or newly issued shares.  Therefore, the Plan
will  provide the Company with an  alternative  means of  developing  additional
equity if new shares are issued.  During 1999 and 1998,  shares  required by the
Plan were  purchased on the open market.  At this time,  the Company  intends to
continue purchasing shares required for the Plan on the open market. However, if
new  shares  were  issued to satisfy  future  Plan  requirements,  the impact on
earnings per share could be dilutive  because of the added  shares  outstanding.
Also,  stockholders  not  participating  in the Plan may experience  dilution of
their ownership percentage.

Capital  Requirements Capital requirements consist primarily of new construction
expenditures for expanding and replacing the Company's utility plant facilities,
and the  acquisition  of new water  properties.  They also  include  refunds  of
advances for construction and retirement of bonds.

         During 1999, total utility plant  expenditures were $44.5 million.  For
1998,  utility  plant  expenditures  totaled  $35.9  million,  compared to $33.9
million in 1997. Expenditures in 1999 included $31.5 million provided by Company
funds and $13.0 million received from developers through contributions in aid of
construction  and refundable  advances for  construction.  Company projects were
funded by internally  generated  funds,  borrowings  under bank credit lines and
commitments, and issuance of the $20 million Series B senior notes.

         The  Company's  2000  construction  program  is  authorized  for  $35.7
million.  The funds for this  program  are  expected to be provided by cash from
operations,  bank  borrowings  and long-term  debt  financing.  New  subdivision
construction  generally  will  be  financed  by  developers'  contributions  and
refundable  advances.  Company-funded  construction  budgets  over the next five
years are projected to be about $175 million.

Capital  Structure  Common  stockholders'  equity  increased  by the  amount  of
earnings not paid out for dividends.  No new equity was issued in the past three
years. The long-term debt portion of the capital structure  increased due to the
issuance of Series B senior notes. It was reduced by first mortgage bond sinking
fund payments.

         The  Company's  total  capitalization  at December  31, 1999 was $337.2
million, compared to $313.9 million at the end of 1998.

         Capital ratios were:                        1999             1998

     Common equity                                  52.1%            54.2%
     Preferred stock                                 1.0%             1.1%
     Long-term debt                                 46.9%            44.7%


                                                                              41



         The 1999 return on average common equity was 11.4%, compared with 11.3%
in 1998 and  14.7% in 1997.  Refer to the  discussion  of  authorized  return on
equity in the "Rates and Regulation" section.

Real Estate  Program The  Company's  subsidiaries  own more than 900 real estate
parcels.  Certain  parcels  are  not  necessary  for or used  in  water  utility
operations. A program has been developed to realize the value of certain surplus
properties  through sale or lease of those properties.  Most surplus  properties
have a low cost basis. The program, which commenced in 1999, will be ongoing for
a period of several  years.  During the next four years,  the Company  estimates
that gross  property  transactions  totaling  over six million  dollars could be
completed.

Stockholder  Rights Plan As  explained in Note 5 to the  Consolidated  Financial
Statements, in January 1998, the Board of Directors adopted a Stockholder Rights
Plan (Plan).  In connection with the Plan, a dividend  distribution of one right
for each common share to purchase  preferred  stock under certain  circumstances
was also authorized.  The Plan is designed to protect  stockholders and maximize
stockholder  value  in  the  event  of  an  unsolicited   takeover  proposal  by
encouraging a prospective acquirer to negotiate with the Board.

Dominguez  Merger                                                        Page 21

On  November  13,  1998,  the  boards  of the  Company  and  Dominguez  Services
Corporation (Dominguez) agreed to the merger of the two companies. The agreement
was subsequently amended on March 22, 1999.

         Dominguez is a utility holding company whose subsidiaries provide water
service to about 40,000  customers  in 20  California  communities.  Its primary
subsidiary,  Dominguez  Water  Company,  is a regulated  water  utility with its
largest  operation  serving  over  32,000  accounts in the South Bay area of Los
Angeles  County  adjacent  to Cal  Water's  Hermosa  Redondo  and  Palos  Verdes
districts.  Dominguez  also has  operations  in Kern  County east of Cal Water's
Bakersfield  district  serving over 4,100 accounts,  in the Antelope Valley area
serving about 1,300 accounts and in an area north of San Francisco serving about
1,900 customers.

         Dominguez'  1998 operating  revenue was $25.3 million.  Its net utility
plant was $44.8 million and it had total assets of $52.6 million.

         The amended agreement  provides that each outstanding  Dominguez common
share will be  exchanged  for  between  1.25 and 1.49  shares of Company  common
stock.  The precise  conversion ratio will depend upon the average closing price
of Company  common stock for a twenty-day  period  preceding  the  transaction's
closing date. The conversion ratio is designed to yield Dominguez shareholders a
$33.75  value for each  Dominguez  share.  At  December  31,  1998,  there  were
1,561,000 shares of Dominguez common stock outstanding. The Company also expects
to assume approximately $12 million of outstanding Dominguez debt.

         Dominguez  shareholders  approved  the merger at a meeting in May 1999.
Necessary approvals from federal agencies, including the Securities and Exchange
Commission and Federal Trade Commission,  have been received.  Final approval of
the CPUC is now anticipated in March 2000.


                                                                              42



Washington Acquisitions

During the fourth quarter of 1999,  the Company  completed the  acquisitions  of
Harbor Water Company near Tacoma and South Sound  Utility  Company near Olympia.
The  two  companies,  which  serve  14,800  customers,  were  merged  into a new
subsidiary,  Washington Water Service Company.  The transactions  were completed
through  tax-free  exchanges of 316,472  Company common  shares,  valued at $8.5
million for all of the shares of the two companies.  The Company also assumed $3
million in outstanding  debt. Both  transactions were accounted for on a pooling
of interest basis.

New Accounting Standard

In 1998, the Financial  Accounting Standards Board issued Statement of Financial
Accounting Standards (SFAS) No. 133, "Accounting for Derivative  Instruments and
Hedging  Activities."  The statement  establishes  new  accounting and reporting
standards for  derivative  financial  instruments  and hedging  activities.  The
Company  expects to adopt the standard in 2000. Its adoption is not  anticipated
to have a material  impact on the  Company's  results of operations or financial
position.

Year 2000 Update

Readiness  The  Company  successfully  transitioned  from  1999 to 2000  without
technology or customer service disruptions as a result of preparation efforts by
our employees in the districts  and at the corporate  office.  A Year 2000 (Y2K)
Transition Team was assembled to ensure the Company's Y2K preparedness. Computer
applications  are currently  processed on a  mainframe-based  system and a local
area network (LAN) computer system.  Most billing  applications are processed on
the mainframe  computer.  The information  systems  department (IS)  inventoried
software  programs  and  modified  them  to  be  Y2K  ready.  A  Y2K  compatible
accounting,  purchasing and human resources  software  package was installed and
operated  on  the  LAN  during  1999  as  scheduled.   The  Company   identified
non-computer equipment and operating systems that potentially contained embedded
date-sensitive  chips.  Steps were taken to make the  equipment  and systems Y2K
ready. The Company continues to monitor its computer-based  systems for possible
Y2K disruptions and is ready to respond in the event of a Y2K related problem.

         Suppliers  and  vendors  with whom the Company  has  material  business
relationships  were  contacted  throughout  1998 and 1999 to  assess  their  Y2K
preparedness.   Those  contacted  included  water   wholesalers,   power  supply
companies,  chemical  vendors,  fuel suppliers,  banks and the stock  registrar.
Operating  units  continue in 2000 to work with  suppliers and vendors to assure
availability of necessary products and supplies.

         The Company's  water systems  operate  independent of each other.  Each
system is unique  as to its  operating  requirements.  Each  operating  district
prepared a Y2K readiness and response plan. The plans were continually  reviewed
and updated as testing was  completed  and new  information  received that could
affect the Y2K transition.

                                                                         Page 22

Costs The estimated  remediation  cost for Y2K  preparedness was about $500,000.
This  includes  the  cost  of  an  outside  consultant,   vendors  and  computer
programming  time. The costs of a new computer  system and software  package are
not included since their


                                                                              43



selection and installation  were not Y2K driven. No IS projects were deferred as
a result of the Y2K  efforts.  The Company did  accelerate  the  acquisition  of
several  portable  boosters  for use in  moving  water  in the  event of a power
outage, with a capitalized cost of about $400,000.

Risks In a worst case  scenario,  the Company  could have been unable to deliver
water to some or all of its  customers if wholesale  suppliers  had not provided
water or power supplies.  Additionally, it could have been impossible to produce
customer  bills or  maintain  accounting  functions  if power  sources  were not
available or computer  billing  programs did not  properly  function.  Insurance
coverage was reviewed and the Company and its broker  believed that the policies
afforded Y2K coverage.

Contingency  Plans Each  district  maintains an emergency  response plan that is
reviewed and updated on a regular basis. These plans are designed to provide for
alternative  operating  plans and procedures in the event normal  operations are
interrupted.  The  emergency  plans were the basis for  developing  separate Y2K
service interruption preparedness and response plans.

         Fixed  site  and  portable   auxiliary  power  generators  are  located
throughout  the service  territories.  These  generators are designed to produce
electric  power for wells and pumps to supply  water to  customers  in the event
power companies  experience outages.  Emergency water connections are maintained
between the Company's  water systems and those of adjacent  purveyors to provide
an emergency water supply.

         Each  district  has  identified   high-profile  water  users,  such  as
hospitals, and developed contingency plans for continued service in the event of
a service disruption. Detailed Y2K plans included the following:  establishing a
timeline to ascertain vendors' ability to provide crucial products and services;
informing employees of Y2K efforts and responsibilities;  scheduling maintenance
so that  water  delivery  facilities  were on line at  year-end;  arranging  for
alternate  water and power supplies;  conducting  "what if" exercises to develop
responses to loss of water or power  outages from normal  sources and  preparing
for manual water system  operations if necessary;  identifying  plans to provide
water service to critical  vendors,  such as  hospitals;  assuring that measures
were in place to maintain water quality and that water testing alternatives were
available;  arranging  for  equipment  needs and  supplies  should Y2K  problems
develop; and scheduling employees to be on duty or available for duty as needed.


CONSOLIDATED BALANCE SHEET                                                                   Page 23

December 31, 1999 and 1998
                                                                                    In thousands
                                                                               1999             1998
                                                                                      
     ASSETS
     Utility plant:

         Land                                                              $  9,424         $  8,221
         Depreciable plant and equipment                                    704,009          667,902
         Construction work in progress                                       13,740           10,829
         Intangible assets                                                   10,179            8,807


                                                                                                  44



              Total utility plant                                           737,352          695,759
         Less depreciation and amortization                                 221,998          206,742
              Net utility plant                                             515,354          489,017

     Current assets:
         Cash and cash equivalents                                            1,437             1,051
         Receivables:
              Customers                                                      12,533           10,700
              Other                                                           3,041            3,436
         Unbilled revenue                                                     7,145            5,958
         Materials and supplies at average cost                               2,229            2,235
         Taxes and other prepaid expenses                                     4,437            4,512
              Total current assets                                           30,822           27,892

     Other assets:
         Regulatory assets                                                   36,458           39,538
         Unamortized debt premium and expense                                 3,503            3,556
         Other                                                                1,481              505
              Total other assets                                             41,442           43,599

                                                                           $587,618         $560,508

CAPITALIZATION AND LIABILITIES
     Capitalization:
         Common stock, $.01 par value; 25,000
              share authorized, 12,936 shares outstanding                  $    129         $    129
         Additional paid-in capital                                          44,881           44,881
         Retained earnings                                                  132,689          126,687
         Accumulated other comprehensive loss                                  (517)              --
         Total common stockholders' equity                                  177,182          171,697
         Preferred stock without mandatory redemption
              provision, $25 par value;  380 shares authorized,
              139 shares outstanding                                          3,475            3,475
              Long-term debt, less current maturities                       156,572          138,758
              Total capitalization                                          337,229          313,930

     Current liabilities:
         Current maturities of long-term debt                                 2,651            2,643
         Short-term borrowings                                               13,599           22,500
         Accounts payable                                                    23,707           16,010
         Accrued taxes                                                        3,556            4,726
         Accrued interest                                                     2,092            1,944
         Other accrued liabilities                                            9,906            9,428
              Total current liabilities                                      55,511           57,251

     Unamortized investment tax credits                                       2,842            2,937
     Deferred income taxes                                                   21,427           27,200


                                                                                                  45



     Regulatory and other liabilities                                        18,001           12,697
     Advances for construction                                               99,991           95,917
     Contributions in aid of construction                                    52,617           50,576

                                                                           $587,618         $560,508
<FN>
See accompanying notes to consolidated financial statements.
</FN>

                                                                                                  46





Consolidated Statement of Income                                                                 Page 24
For the years ended December 31, 1999, 1998 and 1997

                                                                     In thousands, except per share data

                                                                       1999          1998           1997
                                                                                       
      Operating revenue                                            $206,440      $189,659       $198,347
      Operating expenses:
          Operations:
               Purchased water                                       58,132        50,378         52,155
               Purchased power                                       13,033        11,389         12,679
               Pump taxes                                             4,537         3,850          4,302
               Administrative and general                            27,987        25,418         24,566
               Other                                                 26,425        25,065         24,505
          Maintenance                                                 9,183         9,164          9,445
          Depreciation and amortization                              15,802        14,870         13,959
          Income taxes                                               12,176        10,808         14,057
          Property and other taxes                                    8,555         8,178          7,763
               Total operating expenses                             175,830       159,120        163,431

          Net operating income                                       30,610        30,539         34,916

Other income and expenses, net                                        2,510         1,094            949
          Income before interest expense                             33,120        31,633         35,865

Interest expense:
          Long-term debt interest                                    12,144        11,259         11,405
          Other interest                                              1,057         1,438            724
               Total interest expense                                13,201        12,697         12,129

Net income                                                         $ 19,919      $ 18,936       $ 23,736


Basic earnings per share of common stock                           $   1.53      $   1.45       $   1.82
Average number of common shares outstanding                          12,936        12,936         12,936
<FN>
See accompanying notes to consolidated financial statements.
</FN>
                                                                                                      47





Consolidated Statement of Common Stockholders' Equity                                           Page 25
For the years ended December 31, 1999, 1998 and 1997

                                                                  In thousands
                                                                                   Accumulated
                                                         Additional                   Other
                                           Common         Paid-in      Retained   Comprehensive
                                              Stock       Capital      Earnings        Loss         Total
                                                                                  
Balance at December 31, 1996                   $129       $44,881     $111,137     $    --       $156,147

   Net income                                                           23,736                     23,736
   Dividends paid:
          Preferred stock                                                  153                        153
          Common                                                        13,313                     13,313
               Total dividends paid                                     13,466                     13,466
   Income reinvested in business                                        10,270                     10,270
Balance at December 31, 1997                    129        44,881      121,407          --        166,417

   Net income                                                           18,936                     18,936
   Dividends paid:
          Preferred stock                                                  153                        153
          Common stock                                                  13,503                     13,503
               Total dividends paid                                     13,656                     13,656
   Income reinvested in business                                         5,280                      5,280
Balance at December 31, 1998                    129        44,881      126,687          --        171,697
   Net income                                                           19,919                     19,919
   Dividends paid:
          Preferred stock                                                  153                        153
          Common stock                                                  13,764                     13,764
               Total dividends paid                                     13,917                     13,917
   Income reinvested in business                                         6,002                      6,002
   Comprehensive lo                                                                   (517)          (517)
Balance at December 31, 1999                   $129       $44,881     $132,689     $  (517)      $177,182


<FN>
See accompanying notes to consolidated financial statements.
</FN>
                                                                                                       48






                                                                                                 Page 26


CONSOLIDATED STATEMENT OF CASH FLOWS

For the years ended December 31, 1999, 1998 and 1997
                                                                                     In thousands
                                                                              1999       1998       1997
                                                                                        
Operating activities
      Net income                                                           $19,919    $18,936    $23,736
          Adjustments to reconcile net income to net
                  cash provided by operating activities:
              Depreciation and amortization                                 15,802     14,870     13,959
              Deferred income taxes, investment tax credits,
                 and regulatory assets and liabilities, net                  1,056        273      1,072
              Changes in operating assets and liabilities:
                 Receivables                                                (1,438)     1,013     (1,855)
                 Unbilled revenue                                           (1,187)      (780)       399
                 Accounts payable                                            7,697        374        739
                 Other current liabilities                                    (544)     2,726        365
                 Other changes, net                                          1,352        805      1,507
          Net adjustments                                                   22,738     19,281     16,186
                 Net cash provided by operating activities                  42,657     38,217     39,922

      Investing activities:
          Utility plant expenditures:
                 Company funded                                            (31,509)   (30,780)   (26,153)
                 Developer advances and contributions
                    in aid of construction                                 (12,984)    (5,098)    (7,778)
                 Net cash used in investing activities                     (44,493)   (35,878)   (33,931)

      Financing activities:
          Net short-term borrowings                                         (8,901)     8,000      6,900
          Issuance of long-term debt                                        20,062         --         --
          Advances for construction                                          7,435      3,737      4,559
          Refunds of advances for construction                              (3,902)    (3,760)    (3,701)
          Contributions in aid of construction                               3,685      2,746      2,770
          Retirement of long-term debt                                      (2,240)      (733)    (2,324)
          Dividends paid                                                   (13,917)   (13,656)   (13,466)
              Net cash provided (used) in financing activities               2,222     (3,666)    (5,262)

      Change in cash and cash equivalents                                      386     (1,327)       729
      Cash and cash equivalents at beginning of year                         1,051      2,378      1,649
      Cash and cash equivalents at end of year                             $ 1,437    $ 1,051     $2,378

      Supplemental disclosures of cash flow information:
          Cash paid during the year for:
              Interest (net of amounts capitalized)                        $12,900    $11,319    $11,976
              Income taxes                                                  10,849      8,851     14,666


                                                                                                      49



<FN>
See accompanying notes to consolidated financial statements.
</FN>




Notes To Consolidated Financial Statements                               Page 27
December 31, 1999, 1998, and 1997

Note 1. Organization And Operations

California  Water Service Group  (Company) is a holding  company and through its
wholly owned  subsidiaries  provides water utility and other related services in
California and Washington. During 1999, the Company reincorporated as a Delaware
corporation.  California  Water  Service  Company and  Washington  Water Service
Company provide  regulated  utility  services under the rules and regulations of
their respective  regulatory  commissions  (jointly referred to as Commissions).
CWS Utility Services  provides  non-regulated  water utility and related utility
services.

         The Company operates primarily in one business segment, providing water
and related utility services.

Note 2.  Summary of Significant Accounting Policies

The consolidated  financial  statements  include the accounts of the Company and
its wholly owned subsidiaries.  The financial statements give retroactive effect
to acquisitions, which were accounted for as poolings of interests. Intercompany
transactions and balances have been eliminated.

         The accounting records of the Company are maintained in accordance with
the uniform  system of accounts  prescribed  by the  Commissions.  Certain prior
years'  amounts  have been  reclassified,  where  necessary,  to  conform to the
current presentation.

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting period. Actual results could differ from those estimates.

Revenue Revenue consists of monthly cycle customer  billings for regulated water
service  at  rates  authorized  by  the  Commissions  and  billings  to  certain
non-regulated customers. Revenue from metered accounts includes unbilled amounts
based on the  estimated  usage from the latest  meter  reading to the end of the
accounting period.  Flat-rate accounts, which are billed at the beginning of the
service  period,  are  included  in revenue on a pro rata basis for the  portion
applicable to the current accounting period.

Utility Plant  Utility plant is carried at original cost when first  constructed
or purchased,  except for certain minor units of property  recorded at estimated
fair  values at dates of  acquisition.  Cost of  depreciable  plant  retired  is
eliminated  from  utility  plant  accounts  and such costs are  charged  against
accumulated  depreciation.  Maintenance of utility plant is charged primarily to
operation  expenses.  Interest is capitalized on plant  expenditures  during the
construction  period and  amounted to $324,000  in 1999,  $224,000 in 1998,  and
$267,000 in 1997.

         Intangible  assets  acquired  as part of water  systems  purchased  are
stated at amounts as prescribed by the Commissions.  All other  intangibles have
been recorded at


                                                                              50



cost.  Included in intangible assets is $6,500,000 paid to the City of Hawthorne
to lease the city's water system and associated water rights.  The lease payment
is being amortized on a straight-line  basis over the 15-year life of the lease.
The  Company  continually  evaluates  the  recoverability  of  utility  plant by
assessing whether the amortization of the balance over the remaining life can be
recovered through the expected and undiscounted future cash flows.

Depreciation  Depreciation of utility plant for financial  statement purposes is
computed  on the  straight-line  remaining  life  method  at rates  based on the
estimated useful lives of the assets,  ranging from 5 to 65 years. The provision
for depreciation  expressed as a percentage of the aggregate  depreciable  asset
balances  was  2.6% in 1999,  1998,  and  1997.  For  income  tax  purposes,  as
applicable,  the Company  computes  depreciation  using the accelerated  methods
allowed by the respective  taxing  authorities.  Plant additions since June 1996
are depreciated on a straight-line basis for tax purposes.

Cash Equivalents Cash equivalents include highly liquid  investments,  primarily
U.S. Treasury and U.S. Government agency interest bearing securities,  stated at
cost with original maturities of three months or less.

                                                                         Page 28

Long-Term  Debt  Premium,  Discount  and  Expense  The  discount  and expense on
long-term  debt is being  amortized  over the original lives of the related debt
issues.  Premiums  paid on the early  redemption  of  certain  debt  issues  and
unamortized  original  issue  discount and expense of such issues are  amortized
over the life of new debt issued in conjunction with the early redemption.

Accumulated Other  Comprehensive  Loss The Company has an unfunded  Supplemental
Executive  Retirement Plan. The unfunded  accumulated  benefit obligation of the
plan exceeds the accrued  benefit  cost.  This amount  exceeds the  unrecognized
prior service cost,  therefore  accumulated  other  comprehensive  loss has been
recorded as a separate component of Stockholders' Equity.

Advances for Construction Advances for Construction consist of payments received
from developers for installation of water production and distribution facilities
to serve new  developments.  Advances are excluded from rate base. Such payments
are  refundable  to the  developer  without  interest  over a 20-year or 40-year
period.  Refund amounts under the 20-year contracts are based on annual revenues
from the extensions.  Unrefunded  balances at the end of the contract period are
credited to Contributions  in Aid of Construction and are no longer  refundable.
Refunds on contracts  entered  into since 1982 are made in equal annual  amounts
over 40 years.  At December 31, 1999, the amounts  refundable  under the 20-year
contracts were  $7,664,000 and under 40-year  contracts  $92,327,000.  Estimated
refunds for 2000 for all water main extension contracts are $4,100,000.

Contributions  in  Aid of  Construction  Contributions  in  Aid of  Construction
represent  payments  received from  developers,  primarily  for fire  protection
purposes,  which are not


                                                                              51



subject to refunds.  Facilities  funded by contributions are included in utility
plant,  but excluded from rate base.  Depreciation  related to  contributions is
charged to Contributions in Aid of Construction.

Income Taxes The Company accounts for income taxes using the asset and liability
method.  Deferred tax assets and  liabilities  are recognized for the future tax
consequences   attributable  to  differences  between  the  financial  statement
carrying  amounts of existing assets and  liabilities  and their  respective tax
bases.  Measurement of the deferred tax assets and liabilities is at enacted tax
rates expected to apply to taxable income in the years in which those  temporary
differences are expected to be recovered or settled.  The effect on deferred tax
assets and liabilities of a change in tax rates is recognized in the period that
includes the enactment date.

         It is  anticipated  that  future rate  action by the  Commissions  will
reflect  revenue  requirements  for the tax  effects  of  temporary  differences
recognized, which have previously been flowed through to customers.

The Commissions  have granted the Company customer rate increases to reflect the
normalization  of the  tax  benefits  of the  federal  accelerated  methods  and
available  investment  tax credits  (ITC) for all assets placed in service after
1980.  ITC are deferred and amortized  over the lives of the related  properties
for  book  purposes.  Advances  for  Construction  and  Contributions  in Aid of
Construction  received  from  developers  subsequent  to 1986 were  taxable  for
federal  income tax purposes and  subsequent  to 1991 were subject to California
income tax. In 1996 the federal  tax law,  and in 1997 the  California  tax law,
changed  and  the  major  portion  of  future  advances  and  contributions  are
nontaxable.

Earnings  per Share Basic  earnings per share (EPS) is  calculated  using income
available  to  common  stockholders  divided  by  the  weighted  average  shares
outstanding   during  the  year.   The  Company  has  no  dilutive   securities;
accordingly, diluted EPS is not shown.

Note 3.  Acquisitions

The Company  acquired all of the  outstanding  stock of Harbor Water Company and
South Sound Utility  Company,  which form the  operations  of  Washington  Water
Service  Company,  serving 14,800  regulated and  non-regulated  customers.  The
acquisitions,  which were  completed in 1999,  were accounted for as poolings of
interests  in exchange for 316,472  shares of Company  stock and  assumption  of
long-term debt of $2,959,000.  The results of operations  previously reported by
the separate entities and included in the accompanying  financial statements are
not significant.

Note 4. Preferred Stock                                                  Page 29

As of  December  31,  1999 and 1998,  380,000  shares of  preferred  stock  were
authorized.  Dividends on  outstanding  shares are payable  quarterly at a fixed
rate before any  dividends  can be paid on common  stock.  Preferred  shares are
entitled  to  sixteen  votes,  each  with the right to  cumulative  votes at any
election of directors.

         The outstanding 139,000 shares of $25 par value cumulative, 4.4% Series
C preferred  shares are not  convertible  to common stock. A premium of $243,250
would be


                                                                              52



due upon voluntary  liquidation of Series C. There is no premium in the event of
an involuntary liquidation.

Note 5. Common Stockholders' Equity

The Company is  authorized to issue  25,000,000  shares of $.01 par value common
stock. As of December 31, 1999 and 1998,  12,935,612 shares of common stock were
issued and  outstanding.  All shares of common stock are eligible to participate
in the Company's dividend  reinvestment plan.  Approximately 10% of stockholders
participate in the plan.

Stockholder  Rights  Plan In  January  1998,  the Board of  Directors  adopted a
Stockholder Rights Plan (the Plan) and authorized a dividend distribution of one
right  (Right) to purchase  1/100th  share of Series D Preferred  Stock for each
outstanding  share of Common Stock. The Rights became effective in February 1998
and expire in  February  2008.  The Plan is  designed  to  provide  stockholders
protection  and to  maximize  stockholder  value by  encouraging  a  prospective
acquirer to negotiate with the Board.

         Each Right  represents  a right to purchase  1/100th  share of Series D
Preferred  Stock at the  price of $120,  subject  to  adjustment  (the  Purchase
Price). Each share of Series D Preferred Stock is entitled to receive a dividend
equal to 100 times any dividend  paid on common stock and 100 votes per share in
any stockholder  election.  The Rights become  exercisable  upon occurrence of a
Distribution   Date.  A  Distribution  Date  event  occurs  if  (a)  any  person
accumulates 15% of the then outstanding  Common Stock, (b) any person presents a
tender  offer which causes the  person's  ownership  level to exceed 15% and the
Board determines the tender offer not to be fair to the Company's  stockholders,
or (c) the Board determines that a stockholder maintaining a 10% interest in the
Common  Stock could have an adverse  impact on the  Company or could  attempt to
pressure the Company to repurchase the holder's shares at a premium.

         Until the occurrence of a Distribution Date, each Right trades with the
Common  Stock  and is not  separately  transferable.  When a  Distribution  Date
occurs: (a) the Company would distribute  separate Rights Certificates to Common
Stockholders  and the Rights would  subsequently  trade separate from the Common
Stock;  and (b) each holder of a Right,  other than the Acquiring  Person (whose
Rights will thereafter be void), will have the right to receive upon exercise at
its then current  Purchase  Price that number of shares of Common Stock having a
market value of two times the Purchase Price of the Right. If the Company merges
into the acquiring  person or enters into any  transaction  that unfairly favors
the acquiring  person or disfavors the Company's other  stockholders,  the Right
becomes a right to purchase Common Stock of the acquiring person having a market
value of two times the Purchase Price.

         The Board may determine that in certain  circumstances  a proposal that
would cause a distribution date is in the Company  stockholders'  best interest.
Therefore, the Board may, at its option, redeem the Rights at a redemption price
of $.001 per Right.

Note 6.  Short-Term Borrowings

As of December 31, 1999, the Company  maintained a bank line of credit providing
unsecured  borrowings  of up to  $20,000,000  at the prime lending rate or lower
rates as quoted by the bank.  Cal Water  maintained a bank line of credit for an
additional  $30,000,000  on the same  terms as the  Company.  The line of credit
agreements,  which


                                                                              53




expire April 2001, do not require minimum or specific compensating balances. The
following table represents borrowings under these bank lines of credit.

                                                                              Dollars in Thousands

                                                                     1999           1998           1997
                                                                                 
     Maximum short-term borrowings                                $24,000        $24,000        $14,500
     Average amount outstanding                                     9,084         15,750          5,164
     Weighted average interest rate                                  6.52%          7.09%          7.22%
     Interest rate at December 31                                    7.11%          6.97%          7.29%



Note 7.  Long-Term Debt                                                                          Page 30
As of December 31, 1999 and 1998, long-term debt outstanding was:

                                                                                       In Thousands

                                                                                    1999            1998

First Mortgage Bonds:              Series P         7.875%       due 2002       $  2,595        $  2,610
                                   Series S          8.50%       due 2003          2,610           2,625
                                   Series BB         9.48%       due 2008         14,940          16,650
                                   Series CC         9.86%       due 2020         18,700          18,800
                                   Series DD         8.63%       due 2022         19,300          19,400
                                   Series EE         7.90%       due 2023         19,400          19,500
                                   Series FF         6.95%       due 2023         19,400          19,500
                                   Series GG         6.98%       due 2023         19,400          19,500
                                                                                 116,345         118,585

Senior Notes:                      Series A          7.28%       due 2025         20,000          20,000
                                   Series B          6.77%       due 2028         20,000              --

Other long-term debt                                                               2,878           2,816
     Total long-term debt                                                        159,223         141,401
Less current maturities                                                            2,651           2,643

                                                                                $156,572        $138,758

         The  first  mortgage  bonds  are held by  institutional  investors  and
secured by substantially  all of Cal Water's utility plant. The senior notes are
held by  institutional  investors and are  unsecured  and require  interest-only
payments until maturity.  Other long-term debt is primarily  equipment financing
arrangements with other financial institutions. Aggregate maturities and sinking
fund  requirements for each of the succeeding five years (2000 through 2004) are
$2,651,000, $2,613,000, $5,072,000, $5,265,000, and $2,373,000.


                                                                              54




Note 8. Income Taxes
Income tax expense consists of the following:

                                                                           In Thousands

                                                                  Federal          State           Total
                                                                                     
     1999                               Current                   $ 7,476        $ 2,351         $ 9,827
                                        Deferred                    2,524           (175)          2,349
                                        Total                     $10,000        $ 2,176         $12,176

     1998                               Current                   $ 6,368        $ 2,281         $ 8,649
                                        Deferred                    2,515           (356)          2,159
                                        Total                     $ 8,883        $ 1,925         $10,808

     1997                               Current                   $ 9,118        $ 2,894         $12,012
                                        Deferred                    2,239           (194)          2,045
                                        Total                     $11,357        $ 2,700         $14,057


                                                                                                 Page 31

         Income tax expense computed by applying the current federal tax rate of
35% tax  rate to  pretax  book  income  differs  from  the  amount  shown in the
Consolidated  Statement of Income.  The  difference  is  reconciled in the table
below:

                                                                                In Thousands
                                                                     1999           1998            1997
     Computed "expected" tax expense                              $11,233        $10,410         $13,228
     Increase (reduction) in taxes due to:
         State income taxes net of federal tax benefit              1,414          1,251           1,755
         Investment tax credits                                      (173)          (156)           (152)
         Other                                                       (298)          (697)           (774)
     Total income tax                                             $12,176        $10,808         $14,057

The components of deferred income tax expense were:

                                                                                In Thousands
                                                                     1999           1998            1997
     Depreciation                                                 $ 2,629        $ 2,691         $ 2,457
     Developer advances and contributions                            (749)          (798)           (334)
     Bond redemption premiums                                         (62)           (62)            (62)
     Investment tax credits                                           (94)           (93)            (93)
     Other                                                            625            421              77
     Total deferred income tax expense                            $ 2,349        $ 2,159         $ 2,045

The tax effects of  differences  that give rise to  significant  portions of the
deferred tax assets and deferred tax  liabilities  at December 31, 1999 and 1998
are presented in the following table:


                                                                              55



                                                                                        In Thousands
                                                                                    1999            1998
     Deferred tax assets:
         Developer deposits for extension agreements
              and contributions in aid of construction                          $ 40,595         $42,251
         Federal benefit of state tax deductions                                   6,040           2,524
         Book plant cost reduction for future deferred
              ITC amortization                                                     1,679           1,727
         Insurance loss provisions                                                   821             271
         Other                                                                     2,856           1,365
     Total deferred tax assets                                                    51,991          48,138

     Deferred tax liabilities:
         Utility plant, principally due to depreciation differences               72,327          74,186
         Premium on early retirement of bonds                                      1,091           1,152
     Total deferred tax liabilities                                               73,418          75,338
         Net deferred tax liabilities                                           $(21,427)       $(27,200)

         A valuation  allowance was not required during 1999 and 1998.  Based on
historic taxable income and future taxable income projections over the period in
which the deferred assets are deductible,  management believes it is more likely
than  not  that  the  Company  will  realize  the  benefits  of  the  deductible
differences.

Note 9. Employee Benefit Plans                                           Page 32

Pension Plan The Company provides a qualified defined benefit,  non-contributory
pension plan for substantially  all employees.  The cost of the plan was charged
to expense and utility plant. The Company makes annual contributions to fund the
amounts  accrued for pension  cost.  Plan assets are  invested in mutual  funds,
pooled equity, bonds and short-term investment accounts. The data below includes
the unfunded, non-qualified, supplemental executive retirement plan.

Savings  Plan The  Company  sponsors a 401(k)  qualified,  defined  contribution
savings  plan  that  allows  participants  to  contribute  up to 15% of  pre-tax
compensation. The Company matched fifty cents for each dollar contributed by the
employee  up to a maximum  Company  match of 4.0%.  Company  contributions  were
$1,126,000, $1,078,000, and $1,045,000, for the years 1999, 1998 and 1997.

Other  Postretirement  Plans  The  Company  provides  substantially  all  active
employees with medical,  dental and vision benefits through a self-insured plan.
Employees  retiring  at or after  age 58 with 10 or more  years of  service  are
offered, along with their spouses and dependents, continued participation in the
plan by payment of a premium.  Retired employees are also provided with a $5,000
life insurance  benefit.  Plan assets are invested in a mutual fund,  short-term
money market instruments and commercial paper.

         The Company  records the costs of  postretirement  benefits  during the
employees'  years of active service.  The Commissions have issued decisions that
authorize rate recovery of tax deductible funding of postretirement benefits and
permit  recording  of a  regulatory  asset for the portion of costs that will be
recoverable in future rates.


                                                                              56




         The following table  reconciles the funded status of the plans with the
accrued pension  liability and the net  postretirement  benefit  liability as of
December 31, 1999 and 1998:

                                                                              In Thousands
                                                                Pension Benefits          Other Benefits
                                                               1999         1998        1999        1998
                                                                                    
     Change in benefit obligation:
     Beginning of year                                     $ 49,934     $ 44,576    $  9,221    $  8,230
     Service cost                                             2,339        1,899         456         370
     Interest cost                                            3,149        3,011         646         577
     Assumption change                                      (6,669)        2,313       (929)         303
     Plan amendment                                             744           --          --       1,101
     Experience (gain) or loss                               (2,378)         220         507        (872)
     Benefits paid                                           (2,204)      (2,085)       (368)       (488)
     End of year                                           $ 44,915     $ 49,934    $  9,533    $  9,221

     Change in plan assets:
     Fair value of plan assets at beginning of year        $ 44,946     $ 42,390    $  1,214    $    936
     Actual return on plan assets                             5,110        2,433         136         131
     Employer contributions                                     177        2,208          --         635
     Retiree contributions                                       --           --         343         357
     Benefits paid                                           (2,204)      (2,085)       (711)       (845)
     Fair value of plan assets at end of year              $ 48,029     $ 44,946    $    982    $  1,214

     Funded status                                         $  3,114     $(4,988)    $ (8,551)   $ (8,007)
     Unrecognized actuarial (gain) or loss                  (12,332)      (1,708)        964       1,485
     Unrecognized prior service cost                          4,828        4,758         959       1,030
     Unrecognized transition obligation                          --           --       3,228       3,476
     Unrecognized net initial asset                             572          858          --          --
     Net amount recognized                                 $ (3,818)    $ (1,080)   $ (3,400)   $ (2,016)


                                                                                                 Page 33
Amounts recognized on the balance sheet consist of:

                                                                              In Thousands
                                                                Pension Benefits          Other Benefits
                                                               1999         1998        1999        1998

     Accrued benefit costs                                 $ (3,818)    $ (1,080)   $ (3,400)   $ (2,016)
     Additional minimum liability                            (1,460)          --          --          --
     Intangible asset                                           943           --          --          --
     Accumulated other comprehensive loss                       517           --          --          --
     Net amount recognized                                 $ (3,818)    $ (1,080)   $ (3,400)   $ (2,016)

                                                                Pension Benefits          Other Benefits
                                                               1999         1998        1999        1998
     Weighted-average assumptions as
        of December 31:
           Discount rate                                      7.50%        6.75%       7.50%       6.75%


                                                                                                      57



           Long-term rate of return on plan assets             8.0%         8.0%        8.0%        8.0%
           Rate of compensation increases                      4.5%         4.5%          --         --


Net periodic  benefit costs for the pension and other  postretirement  plans for
the years  ending  December  31,  1999,  1998 and 1997  included  the  following
components:

                                                                In Thousands
                                                 Pension Plan                      Other Benefits
                                        1999       1998          1997         1999       1998       1997
                                                                                
     Service cost                     $2,339     $1,899        $1,545       $  456     $  370     $  280
     Interest cost                     3,149      3,011         2,805          646        577        549
     Expected return on
       plan assets                    (3,542)    (3,320)       (2,876)        (107)       (83)       (52)
     Net amortization and
       deferral                          969        823           768          389        346        338
     Net periodic benefit cost        $2,915     $2,413        $2,242       $1,384     $1,210     $1,115

         Postretirement  benefit  expense  recorded in 1999,  1998, and 1997 was
$680,000,  $635,000,  and $581,000.  $3,400,000,  which is  recoverable  through
future customer rates, is recorded as a regulatory asset. The Company intends to
make  annual  contributions  to the  plan up to the  amount  deductible  for tax
purposes.

         For 1999  measurement  purposes,  a 5.5% annual rate of increase in the
per  capita  cost of  covered  benefits  was  assumed;  the rate was  assumed to
decrease  gradually to 5% in the year 2000 and remain at that level  thereafter.
The health  care cost  trend rate  assumption  has a  significant  effect on the
amounts  reported.  A  one-percentage  point change in assumed  health care cost
trends would have the following effect:

                                                           In Thousands
                                                  1-percentage     1-percentage
                                                 Point Increase   Point Decrease
   Effect on total service and interest costs        $250               $(166)
   Effect on accumulated postretirement
       benefit obligation                          $1,378             $(1,121)


                                                                         Page 34

Note 10. Agreement Of Merger With Dominguez Services Corporation

On November  13,  1998,  the Boards of  Directors  of the Company and  Dominguez
Services  Corporation  (Dominguez)  agreed  to a  merger  of the two  companies.
Dominguez is a utility holding company whose wholly owned  subsidiaries  provide
water service to about 40,000 accounts in 20 California communities.  Dominguez'
1998 operating revenue was $25.3 million,  net income was $0.9 million and basic
earnings per share was $0.61.  At December 31, 1998,  its net utility  plant was
$44.8 million and its total assets were $52.6 million.

         The merger agreement  provides that each  outstanding  Dominguez common
share will be exchanged on a tax-free basis for Company  common shares  yielding
an equivalent  value of $33.75 per Dominguez  share. At December 31, 1999, there
were


                                                                              58



1,506,512 shares of Dominguez common stock outstanding. The Company also expects
to  assume  approximately  $12.0  million  of  Dominguez'  long-term  debt.  The
transaction is expected to be accounted for as a pooling of interests.

         The only  approval  the Company has yet to receive is that of the CPUC.
The CPUC's approval of the merger is expected in March of 2000.

Note 11. Fair Value Of Financial Instruments

For those  financial  instruments for which it is practicable to estimate a fair
value the following methods and assumptions were used. For cash equivalents, the
carrying amount  approximates  fair value because of the short-term  maturity of
the instruments.  The fair value of the Company's long-term debt is estimated at
$175,700,000 as of December 31, 1999, and  $153,900,000 as of December 31, 1998,
using a discounted  cash flow analysis,  based on the current rates available to
the  Company  for debt of similar  maturities.  The fair value of  advances  for
construction  contracts is estimated at $31,000,000 as of December 31, 1999, and
$30,000,000 as of December 31, 1998, based on data provided by brokers.

Note 12. Quarterly Financial And Common Stock Market Data (Unaudited)

The Company's  common stock is traded on the New York Stock  Exchange  under the
symbol  "CWT."  There  were  approximately  11,000  holders  of common  stock at
December 31, 1999.  Quarterly  dividends  have been paid on common stock for 220
consecutive  quarters and the quarterly  rate has been increased each year since
1968.

                                    1999 - in thousands except per share amounts

                                        first     second        third     fourth
Operating revenue                     $39,853    $52,112      $64,021    $50,454
Net operating income                    4,862      8,062       11,051      6,635
Net income                              2,621      5,649        8,020      3,629
Basic earnings per share                  .20        .43          .62        .28
Common stock market price range:
    High                                31.25      27.63        31.88      32.00
    Low                                 23.38      22.69        25.88      24.13
Dividends paid                         .27125     .27125       .27125     .27125

                                    1998 - in thousands except per share amounts


                                        first     second        third     fourth
Operating revenue                     $35,920    $45,275      $63,380    $45,084
Net operating income                    4,598      6,660       12,273      7,008
Net income                              1,709      3,638        9,662      3,927
Basic earnings per share                  .13        .28          .74        .30
Common stock market price range:
    High                                33.75      30.19        27.69      33.13
    Low                                 24.31      21.50        20.75      21.25
Dividends paid                          .2675      .2675        .2675      .2675


                                                                              59



                                                                         Page 35

Independent Auditors' Report

The Stockholders and Board of Directors
California Water Service Group:

         We  have  audited  the  accompanying   consolidated  balance  sheet  of
California  Water  Service  Group and  subsidiaries  as of December 31, 1999 and
1998, and the related  consolidated  statements of income,  common stockholders'
equity,  and cash  flows for each of the years in the  three-year  period  ended
December  31,   1999.   These   consolidated   financial   statements   are  the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these consolidated financial statements based on our audits.

         We conducted our audits in accordance with generally  accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

         In our opinion, the consolidated financial statements referred to above
present fairly, in all material  respects,  the financial position of California
Water Service Group and  subsidiaries  as of December 31, 1999 and 1998, and the
results  of their  operations  and their cash flows for each of the years in the
three-year period ended December 31, 1999, in conformity with generally accepted
accounting principles.

                                                     KPMG (signature)

     Mountain View, California
     January 21, 2000


                                                                              60



Corporate Information                                                    Page 36

Stock Transfer, Dividend Disbursing and Reinvestment Agent
The First National Bank of Boston
(Boston EquiServe)
P.O. Box 644
Boston, MA  02102-0644
800.736.3001

To Transfer Stock

A change of  ownership  of shares  (such as when stock is sold or gifted or when
owners are deleted from or added to stock  certificates)  requires a transfer of
stock. To transfer stock,  the owner must complete the assignment on the back of
the  certificate  and sign it exactly  as his or her name  appears on the front.
This signature must be guaranteed by an eligible guarantor  institution  (banks,
stock brokers,  savings and loan  associations and credit unions with membership
in  approved  signature  medallion  programs)  pursuant to SEC Rule  17AD-15.  A
notary's acknowledgement is not acceptable. This certificate should then be sent
to Boston EquiServe,  Stockholder Services, by registered or certified mail with
complete transfer instructions.

Bond Registrar
US Bank Trust, N.A.
One California Street
San Francisco, CA  94111-5402
415.273.4580

Executive Office
California Water Service Group
1720 North First Street
San Jose, CA  95112-4598
408.367.8200

Annual Meeting

The Annual Meeting of Stockholders will be held on Wednesday,  April 19, 2000 at
10 a.m. at the Company's Executive Office, located at 1720 North First Street in
San Jose,  California.  Details  of the  business  to be  transacted  during the
meeting  will be  contained  in the  proxy  material,  which  will be  mailed to
stockholders on or about March 17, 2000.

Annual Report for1999 on Form 10-K

A copy of the Company's  report for 1999 filed with the  Securities and Exchange
Commission  on Form 10-K will be  available in April 2000 and can be obtained by
any stockholder at no charge upon written request to the address below.

Stockholder Information
California Water Service Group
Attn:  Stockholder Relations
1720 North First Street
San Jose, CA  95112-4598


                                                                              61



408.367.8200 or 800.750.8200
http://www.calwater.com
- -----------------------


                                                                              62




                                                               Inside Back Cover

Board Of Directors

California Water Service Group,  California  Water Service Company,  CWS Utility
Services (PHOTOGRAPHS: a picture of each director appears above the caption)

Peter C. Nelson*
President and Chief Executive Officer

Robert W. Foy*
Chairman of the Board

C.H. Stump*++
Former Chairman of the Board and former
CEO of California Water Service Company

Linda R. Meier+++
Member, National Advisory Board, Haas Public
Service Center; Member of the Board of
Directors, Comerica Bank-California

George A. Vera+
Chief Financial Officer,
the David & Lucile Packard Foundation

J.W. Weinhardt+*
Chairman of SJW Corp. and Chairman of its subsidiary, San Jose Water Company

Edward D. Harris, JR., M.D.+*
George DeForest Barnett Professor of Medicine,
Stanford University Medical Center

Richard P. Magnuson++
Private Venture Capital Investor

Robert K. Jaedicke+++
Professor Emeritus of Accounting and former
Dean, Stanford Graduate School of Business

Officers

California Water Service Company

Robert W. Foy (1,2,3)
Chairman of the Board

Peter C. Nelson (1,2,3)
President and Chief Executive Officer


                                                                              63



Gerald F. Feeney (1,2,3)
Vice President, Chief Financial Officer and Treasurer

Francis S. Ferraro
Vice President, Regulatory Matters

James L. Good (2)
Vice President, Corporate Communications and Marketing

Robert R. Guzzetta (2)
Vice President, Engineering and Water Quality

Christine L. McFarlane
Vice President, Human Resources

Raymond H. Taylor
Vice President, Operations

Raymond L. Worrell
Vice President, Chief Information Officer

Calvin L. Breed (1)
Controller, Assistant Secretary and Assistant Treasurer

Paul G. Ekstrom (1,2,3)
Corporate Secretary

John S. Simpson
Assistant Secretary, Manager of New Business

Washington Water Service Company

Michael P. Ireland
President

+  Member of the Audit Committee
++ Member of the Compensation Committee
o  Member of the Executive Committee
o  1 Holds the same  position with  California  Water Service Group
o  2 Holds the same position with CWS Utility Services
o  3 Also an officer of Washington Water Service Company


                                                                              64



California Water Service Group                                      (back cover)


1720 North First Street
San Jose, California 95112-4598
408.367.8200
www.calwater.com

Four company logos appear on the back cover:

         California Water Service Group
         California Water Service Company
         CWS Utility Services
         Washington Water Service Company


                                                                              65