<PAGE 1>


               UNITED STATES SECURITIES AND EXCHANGE COMMISSION

                          Washington, D.C. 20549-1004


                                   FORM 10-Q


(Mark One)

[ X ] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

      For the quarterly period ended June 30, 1996

                                      OR

[   ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

      For the Transition Period from ________________ to ________________

                         Commission File Number 1-7316

                            COMMONWEALTH ENERGY SYSTEM                   
      (Exact name of registrant as specified in its Declaration of Trust)

              Massachusetts                                  04-1662010  
      (State or other jurisdiction of                    (I.R.S. Employer
      incorporation or organization)                     Identification No.)


      One Main Street, Cambridge, Massachusetts              02142-9150    
      (Address of principal executive offices)                     (Zip Code)


      Registrant's telephone number, including area code   (617) 225-4000  

                                                                         
      (Former name, address and fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days.       YES   X    NO       

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

                                                   Outstanding at
         Class of Common Stock                     August 1, 1996

      Common Shares of Beneficial
      Interest, $2 par value                       21,529,676 shares

<PAGE 2>


                        PART I. - FINANCIAL INFORMATION

Item 1.  Financial Statements

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                           CONDENSED BALANCE SHEETS

                      JUNE 30, 1996 AND DECEMBER 31, 1995

                                    ASSETS

                            (Dollars in thousands)


                                                     June 30,    December 31, 
                                                       1996          1995     
                                                    (Unaudited)

PROPERTY, PLANT AND EQUIPMENT, at original cost
  Electric                                          $1 116 039   $1 105 502
  Gas                                                  349 818      346 990
  Other                                                 63 300       63 132
                                                     1 529 157    1 515 624
  Less - Accumulated depreciation and
           amortization                                521 112      497 627
                                                     1 008 045    1 017 997
  Add - Construction work in progress
          and nuclear fuel in process                   17 599       10 276
                                                     1 025 644    1 028 273

LEASED PROPERTY, net                                    14 387       14 931

EQUITY IN CORPORATE JOINT VENTURES
  Nuclear electric power companies (2.5%
     to 4.5%)                                           10 123        9 814
  Other investments                                      3 458        3 400
                                                        13 581       13 214

CURRENT ASSETS
  Cash                                                   2 983        4 319
  Accounts receivable                                   98 918      105 377
  Unbilled revenues                                     14 596       31 642
  Inventories, at average cost                          23 759       25 538
  Prepaid taxes and other                                6 637       15 843
                                                       146 893      182 719

DEFERRED CHARGES                                       151 029      150 964

                                                    $1 351 534   $1 390 101




                            See accompanying notes.

<PAGE 3>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                           CONDENSED BALANCE SHEETS

                      JUNE 30, 1996 AND DECEMBER 31, 1995

                        CAPITALIZATION AND LIABILITIES

                            (Dollars in thousands)

                                                    June 30,    December 31,
                                                      1996          1995    
                                                   (Unaudited)
CAPITALIZATION
  Common share investment -
    Common shares, $2 par value -
      Authorized - 50,000,000 shares
      Outstanding - 21,529,676 in 1996 and
        21,528,268 in 1995                          $   43 059   $   43 056
    Amounts paid in excess of par value                111 778      111 749
    Retained earnings                                  256 238      235 980
                                                       411 075      390 785
  Redeemable preferred shares, less current
    sinking fund requirements                           13 590       13 840
  Long-term debt, including premiums, less current
    sinking fund requirements and maturing debt        361 786      377 181
                                                       786 451      781 806

CAPITAL LEASE OBLIGATIONS                               12 747       13 291

CURRENT LIABILITIES
  Interim Financing - 
    Notes payable to banks                              59 750       55 600
    Maturing long-term debt                             24 260       33 230
                                                        84 010       88 830

  Other Current Liabilities -
    Current sinking fund requirements                    8 473        9 103
    Accounts payable                                   114 036      134 908
    Accrued taxes                                       17 425       31 587
    Other                                               35 446       35 407
                                                       175 380      211 005
                                                       259 390      299 835

DEFERRED CREDITS
  Accumulated deferred income taxes                    172 224      170 182
  Unamortized investment tax credits
     and other                                         120 722      124 987
                                                       292 946      295 169

COMMITMENTS AND CONTINGENCIES

                                                    $1 351 534   $1 390 101

                            See accompanying notes.

<PAGE 4>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                        CONDENSED STATEMENTS OF INCOME

           FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 1996 AND 1995

(Dollars in thousands, except per share amounts)
                                  (Unaudited)

                                   Three Months Ended      Six Months Ended 
                                    1996        1995       1996        1995
OPERATING REVENUES
  Electric                         $151 185   $138 643    $318 953   $290 546
  Gas                                68 033     67 072     191 756    175 050
  Steam and other                     3 884      3 539      11 097      9 272
                                    223 102    209 254     521 806    474 868

OPERATING EXPENSES
  Fuel and purchased power           77 750     76 252     176 769    163 468
  Cost of gas sold                   38 193     39 419      99 806     90 555
  Other operation and maintenance    64 915     62 800     126 168    124 691
  Depreciation                       11 844     11 244      26 511     24 995
  Taxes -
    Federal and state income          5 853     (4 040)     22 901      8 817
    Local property and other          5 504      5 864      14 387     14 227
                                    204 059    191 539     466 542    426 753

OPERATING INCOME                     19 043     17 715      55 264     48 115

OTHER INCOME                            820         23       3 221      1 536

INCOME BEFORE INTEREST CHARGES       19 863     17 738      58 485     49 651

INTEREST CHARGES
  Long-term debt                      8 858      9 772      18 230     19 571
  Other interest charges              1 618      1 884       3 066      3 317
  Allowance for borrowed funds
    used during construction            (76)      (348)       (181)      (600)
                                     10 400     11 308      21 115     22 288
NET INCOME                            9 463      6 430      37 370     27 363
  Dividends on preferred shares         267        282         534        564
EARNINGS APPLICABLE TO
  COMMON SHARES                    $  9 196   $  6 148    $ 36 836   $ 26 799
AVERAGE NUMBER OF COMMON
  SHARES OUTSTANDING (a)         21 529 676 21 249 624  21 529 676 21 191 128

EARNINGS PER COMMON SHARE (a)         $ .43      $ .29       $1.71      $1.26
DIVIDENDS DECLARED PER
  COMMON SHARE (a)                    $.385      $.375       $ .77      $ .75

  (a) Prior period amounts have been restated to reflect a two-for-one stock
      split that became effective June 5, 1996.


                            See accompanying notes.

<PAGE 5>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                      CONDENSED STATEMENTS OF CASH FLOWS

                FOR THE SIX MONTHS ENDED JUNE 30, 1996 AND 1995

(Dollars in thousands)
                                  (Unaudited)

                                                         1996         1995   

OPERATING ACTIVITIES
  Net income                                           $ 37 370     $ 27 363
  Effects of noncash items -
    Depreciation and amortization                        32 225       30 987
    Deferred income taxes and investment
      tax credits, net                                      190         (577)
    Earnings from corporate joint ventures                 (892)        (763)
  Dividends from corporate joint ventures                   525          867
  Change in working capital, exclusive of cash
    and interim financing                                (1 135)      38 086
  All other operating items                              (9 284)     (20 887)
Net cash provided by operating activities                58 999       75 076

INVESTING ACTIVITIES
  Additions to property, plant and equipment
    (exclusive of AFUDC) -
      Electric                                          (19 123)     (26 927)
      Gas                                                (3 233)      (6 150)
      Other                                                (253)        (522)
  Allowance for borrowed funds used during
    construction                                           (181)        (600)
Net cash used for investing activities                  (22 790)     (34 199)

FINANCING ACTIVITIES
  Sale of common shares                                      32        4 798
  Payment of dividends                                  (17 112)     (16 490)
  Proceeds from (payment of) short-term borrowings        4 150      (21 700)
  Long-term debt issues refunded                        (23 230)     (10 000)
  Sinking funds payments                                 (1 385)      (1 825)
Net cash used for financing activities                  (37 545)     (45 217)
Net decrease in cash                                     (1 336)      (4 340)
Cash at beginning of period                               4 319        7 722
Cash at end of period                                  $  2 983     $  3 382

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
  Cash paid during the period for:
    Interest (net of capitalized amounts)              $ 19 785     $ 20 884
    Income taxes                                       $ 17 173     $  4 545




                            See accompanying notes.


<PAGE 6>

              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

                    NOTES TO CONDENSED FINANCIAL STATEMENTS

(1) General Information

        Commonwealth Energy System, the parent company, is referred to in this
    report as the "System" and, together with its subsidiaries, is collec-
    tively referred to as "the system."  The System is an exempt public
    utility holding company under the provisions of the Public Utility Holding
    Company Act of 1935 with investments in four operating public utility
    companies located in central, eastern and southeastern Massachusetts.  In
    addition, the System has interests in other utility and several non-
    regulated companies.

        The system has 2,044 regular employees including 1,209 (59%)
    represented by various collective bargaining units.  Negotiations to
    resolve a labor dispute with one collective bargaining unit that
    represents approximately 17% of regular employees are ongoing.  The
    agreement that covered this bargaining unit expired on March 31, 1996 and 
    work performed by these employees has been disrupted since that time.  A
    workforce of management personnel and experienced contractors are
    performing all essential tasks.  Management is unable to predict the
    ultimate outcome of these negotiations.  New agreements were reached
    earlier this year with two other bargaining units (representing
    approximately 23% of regular employees) that were scheduled to expire on
    October 1, 1996 and November 1, 1997.  These new agreements will remain in
    effect until 2002 and 2001, respectively.

(2) Significant Accounting Policies

    (a) Principles of Accounting

        The system's significant accounting policies are described in Note 1
    of Notes to Consolidated Financial Statements included in its 1995 Annual
    Report on Form 10-K filed with the Securities and Exchange Commission. 
    For interim reporting purposes, the system follows these same basic
    accounting policies but considers each interim period as an integral part
    of an annual period and makes allocations of certain expenses to interim
    periods based upon estimates of such expenses for the year.

        Generally, expenses which relate to more than one interim period are
    allocated to other periods to more appropriately match revenues and
    expenses.  Principal items of expense which are allocated other than on
    the basis of passage of time are depreciation and property taxes of the
    gas subsidiary, Commonwealth Gas Company (Commonwealth Gas).  These
    expenses are recorded for interim reporting purposes based upon projected
    gas revenue.  Income tax expense is recorded using the statutory rates in
    effect applied to book income subject to tax for each interim period.

        The unaudited financial statements for the periods ended June 30, 1996
    and 1995, reflect, in the opinion of the System, all adjustments (consist-
    ing of only normal recurring accruals) necessary to summarize fairly the
    results for such periods.  In addition, certain prior period amounts are
    reclassified from time to time to conform with the presentation used in
    the current period's financial statements.

<PAGE 7>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

        The results for interim periods are not necessarily indicative of
    results for the entire year because of seasonal variations in the
    consumption of energy and Commonwealth Gas' seasonal rate structure.

    (b) Regulatory Assets and Liabilities

        Regulated subsidiaries of the System have established various
    regulatory assets in cases where the Massachusetts Department of Public
    Utilities (DPU) and/or the Federal Energy Regulatory Commission (FERC)
    have permitted or are expected to permit recovery of specific costs over
    time.  Similarly, the regulatory liabilities established by the system are
    required to be refunded to customers over time.

        Based on the current regulatory framework, the system accounts for the
    economic effects of regulation in accordance with the provisions of
    Statement of Financial Accounting Standards (SFAS) No. 71, "Accounting for
    the Effects of Certain Types of Regulation."  On January 1, 1996, the
    system adopted SFAS No. 121, "Accounting for the Impairment of Long-Lived
    Assets and for Long-Lived Assets to be Disposed Of."  SFAS No. 121 imposes
    stricter criteria for regulatory assets by requiring that such assets be
    probable of future recovery at each balance sheet date.  As of June 30,
    1996, SFAS No. 121 did not have an impact on its financial position or
    results of operations.  However, this result may change as modifications
    are made in the current regulatory framework pursuant to electric utility
    restructuring orders issued by the DPU including a final order that is
    expected to be issued by the end of 1996.  For additional discussion of
    electric industry restructuring activities, see Management's Discussion
    and Analysis of Financial Condition and Results of Operations in Item 2 of
    this report. 

        The principal regulatory assets included in deferred charges were as
    follows:

                                                      June 30,   December 31,
                                                        1996          1995    
                                                      (Dollars in thousands)
        Postretirement benefit costs including
           pensions                                    $ 24 701    $ 24 608
        Power contract buy-out                           22 460      23 838
        Fuel charge stabilization                        21 975      22 063
        Deferred income taxes                            14 188      14 106
        FERC Order 636 transition costs                  10 726      11 711
        Yankee Atomic unrecovered plant
           and decommissioning costs                      9 001      10 135
        Seabrook related costs                            7 891       9 511
        Other                                            14 083      14 700
                                                       $125 025    $130 672

        The principal regulatory liabilities, reflected in the accompanying
    condensed balance sheets and related to deferred income taxes, were $19
    million and $20.6 million at June 30, 1996 and December 31, 1995,
    respectively.

<PAGE 8>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

(3) Commitments and Contingencies

        Construction Program

        The system is engaged in a continuous construction program presently
    estimated at $293 million for the five-year period 1996 through 2000.  Of
    that amount, $69.3 million is estimated for 1996.  The program is subject
    to periodic review and revision.

(4) Common Shares

        On June 5, 1996, the System effected a two-for-one stock split of its
    outstanding common shares which was proposed by the System's Board of
    Trustees on March 28, 1996 and subsequently approved by the System's
    shareholders on May 2, 1996.  The record date for the stock split was May
    15, 1996.  The split resulted in the issuance of an additional 10.8
    million common shares and accompanied an increase in the number of
    authorized common shares from 18 million to 50 million and a change in the
    par value from four dollars to two dollars per common share.  Prior period
    amounts for the average number of common shares outstanding, earnings per
    common share, dividends declared per common share and common share
    investment information in the accompanying condensed financial statements
    have been restated to reflect the stock split.

<PAGE 9>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

Item 2. Management's Discussion and Analysis of Financial Condition
        and Results of Operations

        Financial Condition

        Capital resources of the System and its subsidiaries are derived
    principally from retained earnings and equity funds provided through the
    System's Dividend Reinvestment and Common Share Purchase Plan (DRP). 
    However, effective February 1, 1996, the System's DRP common share
    requirement is being fulfilled through open market purchases rather than
    the direct issue of common shares.  This change was prompted by the
    System's improving financial condition and reduced need for equity
    capital.  Supplemental interim funds are borrowed on a short-term basis
    and, when necessary, replaced with new equity and/or debt issues through
    permanent financing secured on an individual company basis.  The System
    purchases 100% of all subsidiary common stock issues and provides, to the
    extent possible, a portion of the subsidiaries' short-term financing
    needs.  These capital resources provide the funds required for the
    subsidiary companies' construction programs, current operations, debt
    service and other capital requirements.

        During the first half of 1996, cash flows from operating activities
    amounted to approximately $59 million and reflect net income of $37.4
    million and noncash items including depreciation of $26.5 million and $5.7
    million in amortization and deferred income taxes.  Working capital since
    December 31, 1995, exclusive of cash and interim financing, decreased 
    $1.1 million reflecting lower levels of accounts payable ($20.9 million)
    and accrued taxes ($14.2 million) offset, in part, by a decrease in
    unbilled revenues ($17 million), prepaid taxes ($9 million), accounts
    receivable ($6.5 million) and inventories ($1.8 million).

        Construction expenditures for the first half of 1996 were approxi-
    mately $22.8 million, including an allowance for funds used during
    construction (AFUDC) and nuclear fuel.  Construction expenditures,
    preferred and common dividend requirements of the System ($17.1 million)
    and the refunding of long-term debt ($23.2 million) were funded almost
    entirely with internally-generated funds.  Proceeds from short-term
    borrowings of $4.2 million helped to meet the cash requirements for the
    current six-month period.

        Results of Operations

        The following is a discussion of certain significant factors that have
    affected operating revenues, expenses and net income during the periods
    included in the accompanying condensed statements of income.  This
    discussion should be read in conjunction with the Notes to Condensed
    Financial Statements appearing elsewhere in this report.

<PAGE 10>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

        A summary of the period to period changes in the principal items
    included in the accompanying condensed statements of income for the three
    and six-month periods ended June 30, 1996 and 1995 and unit sales for
    these periods is shown below:

                                          Three Months          Six Months
                                         Ended June 30,       Ended June 30,
                                          1996 and 1995        1996 and 1995 
                                                 Increase (Decrease)
                                               (Dollars in thousands)
  Operating Revenues -
      Electric                           $12 542      9.0%    $28 407     9.8%
      Gas                                    961      1.4      16 706     9.5
      Steam and other                        345      9.7       1 825    19.7
                                          13 848      6.6      46 938     9.9

  Operating Expenses -
      Fuel and purchased power             1 498      2.0      13 301     8.1
      Cost of gas sold                    (1 226)    (3.1)      9 251    10.2
      Other operation and maintenance      2 115      3.4       1 477     1.2
      Depreciation                           600      5.3       1 516     6.1
      Taxes -
         Federal and state income          9 544    236.2      14 084   159.7
         Local property and other            (11)    (0.2)        160     1.1
                                          12 520      6.5      39 789     9.3

  Operating Income                         1 328      7.5       7 149    14.9

  Other Income                               797   3465.2       1 685   109.7

  Income Before Interest Charges           2 125     12.0       8 834    17.8

  Interest Charges                          (908)    (8.0)     (1 173)   (5.3)

  Net Income                               3 033     47.2      10 007    36.6

  Dividends on preferred shares              (15)    (5.3)        (30)   (5.3)

  Earnings Applicable to Common Shares  $  3 048     49.6    $ 10 037    37.5

  Unit Sales
    Electric - Megawatthours (MWH)
      Retail                              33 610      3.1      56 815     2.5
      Wholesale                          323 149    122.5     679 140   103.5
                                         356 759     26.3     735 955    25.4

    Gas - Billions of British Thermal
          Units (BBTU)
      Firm                                   648     10.4       2 731    12.2
      Interruptible and other               (276)   (14.8)     (1 446)  (38.3)
                                             372      4.6       1 285     4.9

<PAGE 11>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      The following is a summary of electric and gas unit sales for the three
  and six-month periods ended June 30, 1996 and 1995:

                                   Three Months Ended      Six Months Ended
                                        June 30,               June 30,      
                                     1996      1995         1996      1995 
  Electric Sales - MWH
      Residential                   417 715    392 619     903 739    850 110
      Commercial                    596 162    590 913   1 179 886  1 177 610
      Industrial                    109 225    105 941     203 276    202 250
      Other                           5 108      5 127      11 569     11 685
         Total retail sales       1 128 210  1 094 600   2 298 470  2 241 655
      Wholesale sales               587 002    263 853   1 335 450    656 310
         Total                    1 715 212  1 358 453   3 633 920  2 897 965

  Gas Sales - BBTU
      Residential                     3 719      3 459      14 143     12 863
      Commercial                      1 942      1 731       7 072      6 163
      Industrial                        857        765       2 531      2 239
      Other                             384        299       1 350      1 100
         Total firm sales             6 902      6 254      25 096     22 365
      Off-system sales                  704        967         953      2 380
      Quasi-firm sales                  361        520         485        870
      Interruptible sales               520        374         893        527
         Total                        8 487      8 115      27 427     26 142


  Electric Operating Revenues, Fuel and Purchased Power Costs

      Electric operating revenues increased $12.5 million (9%) and $28.4
  million (9.8%) during the current quarter and first half of 1996 due mainly
  to higher total unit sales reflecting an increase in retail unit sales of
  3.1% and 2.5% and higher wholesale revenues of $8.5 million and $20.7
  million that resulted from the changing capacity needs of non-affiliated
  utilities and NEPOOL.  However, changes in wholesale electric sales have
  little, if any, impact on net income.  The increase in revenues in both
  current periods was also attributed to the absence of a $7.5 million refund
  to customers during the second quarter of 1995 that related to settlement
  agreements reached with the Massachusetts Department of Public Utilities
  (DPU).  The increase in retail unit sales, particularly in the residential
  sector, during the current quarter and first half of 1996 was attributed
  mainly to more favorable weather and a slight increase in customers.

      Fuel and purchased power increased approximately $1.5 million (2%) and
  $13.3 million (8.1%) during the current three and six-month periods
  reflecting higher unit sales and greater fuel costs at Canal (a major
  supplier of electricity to the system) resulting from the absence of
  scheduled maintenance to Canal Unit 1 that occurred in 1995 offset, to a
  great degree, by a decline in purchases from independent power producers.

<PAGE 12>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

  Gas Operating Revenues and Cost of Gas Sold

      During the current quarter, gas operating revenues increased nearly $1
  million (1.4%) due mainly to higher firm unit sales offset, in part, by a
  lower level of cost of gas sold ($1.2 million), which reflected a decline
  in the price of gas and lower off-system and quasi-firm sales.  Gas
  operating revenues for the first half of 1996 increased approximately $16.7
  million (9.5%) due mainly to a $9.3 million increase in the cost of gas
  sold that reflected higher firm and interruptible unit sales.  These
  increases were somewhat offset by a decline in off-system sales and quasi-
  firm sales and a lower level of C&LM costs ($1.2 million).  Fluctuations in
  interruptible unit sales during both the current quarter and first half of
  1996 had no impact on net income.

      The increase in unit sales to firm customers during the current quarter
  (10.4%) and first half of 1996 (12.2%) reflects significant weather-related
  improvements for all customer segments due to the colder than normal
  weather experienced throughout the region, particularly during the first
  quarter as compared to milder weather last year.  A growing customer base
  also contributed to the increase in firm unit sales during both current
  periods.  Heating degree days were nearly 4% and 11% higher in the current
  quarter and first half of 1996 as compared to the same periods in 1995.

      The decreases in off-system and quasi-firm sales had no impact on net
  income during the current quarter and first half of 1996.  A portion of the
  margin realized on these sales reduces the cost of gas sold to firm
  customers and the remaining amount is deferred pending approval of the
  Company's margin sharing proposals.  The proposal related to quasi-firm
  sales was filed in December 1995 and a ruling is expected from the DPU
  later this year.  The proposal for off-system sales is expected to be filed
  by the end of this year.

  Other Operation and Maintenance

      For the current quarter and first half of 1996, other operation and
  maintenance increased approximately $2.1 million (3.4%) and $1.5 million
  (1.2%) reflecting higher postretirement benefit costs ($1.7 million and
  $3.3 million) and the net impact of a labor dispute discussed in Note 1 of
  Notes to Condensed Financial Statements in Item 1 of this report.  These
  increases were partially offset by an $851,000 and $1.7 million reduction
  in maintenance costs, primarily associated with Canal Unit 1, for the three
  and six-month periods, lower insurance costs and a decline in the provision
  for bad debts.

  Depreciation and Taxes

      Depreciation expense increased $600,000 (5.3%) and $1.5 million (6.1%)
  during the current three and six-month periods due primarily to a higher
  level of depreciable plant, particularly Canal Unit 1.  Federal and state
  income taxes increased significantly during the current periods due mainly
  to the impact of the settlement agreements previously discussed and a
  greater level of taxable income.  Local property and other taxes were
  virtually unchanged as compared to the same periods in 1995.

<PAGE 13>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

  Other Income and Interest Charges

      During the current quarter and first half of 1996, other income
  increased $797,000 and $1.7 million as compared to the same periods in 1995
  due mainly to a gain recognized on the sale of a parcel of non-utility
  land.  The change in the current six-month period also reflects the
  recording of a regulatory asset by Canal for costs associated with
  postretirement benefits that are now being recovered in wholesale rates.

      The decline in total interest charges for the current three and six-
  month periods mainly reflects scheduled sinking fund payments and maturing
  long-term debt.

  Electric Industry Restructuring

      On August 16, 1995, the DPU issued an order calling for the restructur-
  ing of the electric utility industry in Massachusetts.  The DPU's intent is
  to reduce electric costs to consumers by providing customers with the
  opportunity to choose their electric power provider while companies such as
  the System's retail electric subsidiaries continue to provide transmission
  and distribution services.  On May 1, 1996, the DPU issued an order
  containing proposed rules for implementing electric industry restructuring.

      The proposed rules, which were the subject of public comment and
  hearings during June and July 1996, provide for:

    (1)  the establishment of an independent system operator to operate the
         regional transmission system;
    (2)  a power exchange to manage a competitive bidding pool for short-term
         power sales;
    (3)  functional separation of electric companies into generation,
         transmission and distribution corporate entities;
    (4)  preservation of discounts for low-income customers, shut-off
         protections and provision of service to all customers;
    (5)  registration requirements for generation suppliers;
    (6)  options for phased incentives for electric companies to divest their
         generation assets;
    (7)  promotion of environmental goals;
    (8)  support for energy efficiency and renewable energy resources;
    (9)  a price cap system of incentive regulation for the remaining
         distribution and transmission functions;
   (10)  unbundling of rates on bills into separate components of
         transmission, distribution and energy, and implementation of a
         competitive generation market by January 1, 1998; and
   (11)  a reasonable opportunity for recovery of stranded cost.

  On August 9, 1996, the DPU issued an order delaying the issuance of final
  rules until the end of 1996.  The DPU also stated that it will soon issue a
  revised schedule for electric companies to make company-specific unbundled
  rate filings.

<PAGE 14>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

      Although the DPU has not yet issued its revised rate filing schedule,
  Commonwealth Electric Company and Cambridge Electric Light Company (the
  Companies) anticipate filing their revenue-neutral, unbundled rates in
  early 1997 after the issuance of the DPU's final rules.  Also, during 1997,
  the Companies will file their comprehensive restructuring plan.  One
  element of the Companies' plan (announced on February 15, 1996) calls for
  the auctioning, in a competitive market, of their capacity entitlement
  (1,140 MW) in all twenty-one power contracts in an effort to develop a
  competitive market whereby customers would have the flexibility to choose
  their electric supplier.  These entitlements include contracts for power
  from Canal Units 1 and 2 and Seabrook 1, which are owned or jointly owned
  by the System's generating subsidiary Canal Electric Company.  The
  Companies' plan provides for total recovery of the difference between the
  current market value of the Companies' power contracts and their
  unavoidable costs.  Under the Companies' plan, this difference, a component
  of what is often referred to as stranded cost, would be recovered through a
  non-bypassable access charge paid over an appropriate time period by all
  customers in the Companies' service areas.

      The DPU's May 1 order reaffirmed that one of its transition principles
  is to seek near-term rate relief for electric customers.  Also, the DPU's
  proposed rules would limit the period for recovery of net, non-mitigable
  stranded cost to a ten-year period (January 1, 1998 through December 31,
  2007).  Recovery of stranded cost depends upon the timing, nature, and
  degree of competition that may result from future changes in regulatory
  policies governing the Companies' activities and prices, as well as future
  power costs and market prices of power.  The Companies' single largest
  component of stranded cost relates to their purchased power contracts with
  non-utility generators.  Based on their analyses of the DPU's proposal, the
  Companies would be unable to recover a substantial portion of their
  stranded cost within the ten-year period without rate increases.

      Generally accepted accounting principles require that losses be accrued
  in full when costs to complete a contract are expected to exceed related
  revenues expected to be realized.  To the extent that the Companies
  determine that they will be unable to recover costs associated with their
  purchased power contracts, the Companies would be required to take an
  immediate charge against earnings when such a loss is probable and
  estimable.  Statement of Financial Accounting Standards No. 121 -
  "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
  Assets to be Disposed Of" (SFAS No. 121) which became effective for 1996,
  requires impairment losses on long-lived assets to be recognized when the
  book value of an asset exceeds its expected future cash flows.  This
  standard also imposes stricter criteria for the retention of regulatory-
  created assets by requiring that such assets be probable of future recovery
  at each balance sheet date.  To the extent such recovery is not probable at
  the balance sheet date, the Companies would be required to take a charge
  against earnings in that period.

      The Companies currently account for the economic effects of regulation
  in accordance with the provisions of Statement of Financial Accounting
  Standards No. 71, "Accounting for the Effects of Certain Types of
  Regulation" (SFAS No. 71) based on the cost-of-service regulatory 

<PAGE 15>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES

  framework in which they operate.  The DPU has proposed that the
  distribution and transmission functions of their businesses be regulated
  under a form of price capped incentive regulation.

      In the event that recovery of specific costs through rates becomes
  unlikely or uncertain for all or a portion of the Companies' utility
  operations, whether resulting from the expanding effects of competition or
  specific regulatory actions which move the Companies away from cost-of-
  service ratemaking, SFAS No. 71 would no longer apply.  While the Companies
  are unable to predict the final rules which may be adopted by the DPU in
  its restructuring effort, the Companies could be required to discontinue
  the application of SFAS No. 71.   Discontinuance of SFAS No. 71 would cause
  the write-off of the applicable portions of their regulatory assets which
  would have an adverse impact on the Companies' financial position and
  results of operations.  The Companies will challenge any order that would
  have a significant adverse impact on them, including attempts to limit
  their recovery of stranded cost.

  Environmental Matters

      Commonwealth Gas is participating in the assessment of a number of
  former manufactured gas plant (MGP) sites and alleged MGP waste disposal
  locations to determine if and to what extent such sites have been
  contaminated and whether Commonwealth Gas may be responsible for remedial
  actions.  Commonwealth Gas and certain other subsidiaries are also involved
  in other known or potentially contaminated sites where the associated costs
  may not be recoverable in rates.  There were no significant new
  developments that occurred during the first half of 1996.  For further
  information on these matters, refer to the System's 1995 Annual Report on
  Form 10-K.

<PAGE 16>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES


Item 1.     Legal Proceedings

       The System is subject to legal claims and matters arising from its
       course of business including Cambridge Electric's involvement in two
       court actions filed by the Massachusetts Institute of Technology (MIT)
       relating to a September 1995 decision of the DPU approving Cambridge
       Electric's customer transition charge (CTC) for the recovery of
       stranded cost.  The first proceeding is an appeal by MIT of the DPU
       decision to the Massachusetts Supreme Judicial Court (SJC).  Cambridge
       Electric is an intervenor in this proceeding.  The SJC has not yet
       established a schedule for submitting briefs.  This issue is discussed
       more fully in the System's 1995 Annual Report on Form 10-K.  At this
       time, management is unable to predict the outcome of this proceeding.

       The second proceeding involves a complaint filed by MIT in May 1996
       with the United States District Court alleging that the CTC is
       inconsistent with the provisions of the Public Utility Regulatory
       Policies Act of 1978 (PURPA), discriminates against qualifying
       facilities, and is inconsistent with the policies of the Federal
       Energy Regulatory Commission (FERC) regarding stranded cost recovery. 
       MIT named both the DPU and Cambridge Electric as parties to the
       complaint.  In June 1996, Cambridge Electric filed a Motion to Dismiss
       MIT's complaint arguing that the Court lacks jurisdiction over the
       matter, the CTC is wholly consistent with PURPA, and, in the
       alternative, the Court must abstain from considering the case to avoid
       interfering with the SJC proceeding.  Cambridge Electric also noted
       that MIT's complaint is virtually identical to a complaint filed
       earlier by MIT at the FERC that the FERC dismissed.  A hearing on the
       Motion to Dismiss was held in July 1996.  The Court has taken the
       matter under advisement, and, at this time, management is unable to
       predict the outcome of this proceeding.

Item 2.     Changes in the Rights of the Company's Security Holders

       None

Item 3.     Defaults by the Company on its Senior Securities

       None

Item 4.     Results of Votes of Security Holders

       None

Item 5.     Other Information

       None

<PAGE 17>


              COMMONWEALTH ENERGY SYSTEM AND SUBSIDIARY COMPANIES
                          PART II - OTHER INFORMATION


Item 6.      Exhibits and Reports on Form 8-K

       (a)   Exhibits

             Exhibit 27 - Financial Data Schedule

             Filed herewith as Exhibit 1 is the Financial Data Schedule for
             the six months ended June 30, 1996.

             Filed herewith as Exhibit 2 is the restated Financial Data
             Schedule for the six months ended June 30, 1995.

       (b)   Reports on Form 8-K

             No reports on Form 8-K were filed during the three months ended
             June 30, 1996.

<PAGE 18>


                          COMMONWEALTH ENERGY SYSTEM

                                  SIGNATURES

   Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                                            COMMONWEALTH ENERGY SYSTEM
                                                  (Registrant)


                                            Principal Financial and
                                               Accounting Officer



                                            JAMES D. RAPPOLI             
                                            James D. Rappoli,
                                            Financial Vice President
                                              and Treasurer




Date:  August 14, 1996