<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 September 30, 1998

                                      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                     November 1, 1998

      Common Shares of Beneficial
      Interest, $2 par value                       21,533,820 shares

<PAGE 2>


                        PART I. - FINANCIAL INFORMATION

Item 1.  Financial Statements

                          COMMONWEALTH ENERGY SYSTEM

                     CONSOLIDATED CONDENSED BALANCE SHEETS

                   SEPTEMBER 30, 1998 AND DECEMBER 31, 1997

                                    ASSETS

                            (Dollars in thousands)


                                                   September 30, December 31,
                                                        1998         1997     
                                                    (Unaudited)

PROPERTY, PLANT AND EQUIPMENT, at original cost
  Electric                                         $1,191,436    $1,173,797
  Gas                                                 383,468       373,541
  Other                                               118,675        72,475
                                                    1,693,579     1,619,813
  Less - Accumulated depreciation and
           amortization                               618,987       577,962
                                                    1,074,592     1,041,851
  Add - Construction work in progress
          and nuclear fuel in process                  15,025         8,057
                                                    1,089,617     1,049,908

EQUITY IN CORPORATE JOINT VENTURES
  Nuclear electric power companies (2.5%
     to 4.5%)                                          10,217        10,368
  Other investments                                     2,918         3,399
                                                       13,135        13,767

CURRENT ASSETS
  Cash                                                  3,650         4,299
  Accounts receivable                                 100,523       128,946
  Unbilled revenues                                    11,382        32,029
  Inventories, at average cost                         34,624        32,644
  Prepaid taxes and other                              22,614        15,068
                                                      172,793       212,986

DEFERRED CHARGES
  Regulatory assets                                   198,605       178,864
  Other                                                64,316        29,525
                                                      262,921       208,389

                                                   $1,538,466    $1,485,050



                            See accompanying notes.

<PAGE 3>

                          COMMONWEALTH ENERGY SYSTEM

                     CONSOLIDATED CONDENSED BALANCE SHEETS

                   SEPTEMBER 30, 1998 AND DECEMBER 31, 1997

                        CAPITALIZATION AND LIABILITIES

                            (Dollars in thousands)

                                                  September 30, December 31,
                                                       1998         1997    
                                                   (Unaudited)
CAPITALIZATION
  Common share investment -
    Common shares, $2 par value -
      Authorized - 50,000,000 shares
      Outstanding - 21,533,820 in 1998 and
        21,531,784 in 1997                        $   43,068     $   43,063
    Amounts paid in excess of par value              112,075        111,912
    Retained earnings                                291,585        275,795
                                                     446,728        430,770
  Redeemable preferred shares, less current
    sinking fund requirements                         11,380         12,200
  Long-term debt, including premiums, less current
    sinking fund requirements and maturing debt      475,317        364,311
                                                     933,425        807,281

CAPITAL LEASE OBLIGATIONS                             11,251         12,272

CURRENT LIABILITIES
  Interim Financing - 
    Notes payable to banks                            74,050         94,075
    Maturing long-term debt                           49,000         19,000
                                                     123,050        113,075

  Other Current Liabilities -
    Current sinking fund requirements                  8,473          8,473
    Accounts payable                                  74,076        107,157
    Accrued taxes                                     31,103         24,205
    Other                                             77,071         58,922
                                                     190,723        198,757
                                                     313,773        311,832

DEFERRED CREDITS
  Accumulated deferred income taxes                  109,018        176,354
  Purchased power contracts                           62,132         69,659
  Unamortized investment tax credits
     and other                                       108,867        107,652
                                                     280,017        353,665

COMMITMENTS AND CONTINGENCIES

                                                  $1,538,466     $1,485,050

                            See accompanying notes.

<PAGE 4>

                          COMMONWEALTH ENERGY SYSTEM

                  CONSOLIDATED CONDENSED STATEMENTS OF INCOME

        FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1998 AND 1997

          (Dollars in thousands except per share amounts - unaudited)

                                   Three Months Ended      Nine Months Ended 
                                    1998        1997       1998        1997
OPERATING REVENUES
  Electric                         $178,196   $177,723    $473,393   $511,778
  Gas                                43,308     41,870     216,682    235,067
  Steam and other                    12,102      2,522      24,426     13,404
                                    233,606    222,115     714,501    760,249

OPERATING EXPENSES
  Fuel and purchased power           94,773     97,275     250,779    289,320
  Cost of gas sold                   25,145     25,390     116,048    128,127
  Other operation and maintenance    73,142     59,809     197,876    199,996
  Depreciation                       14,456     12,078      45,012     40,398
  Taxes -
    Federal and state income          3,431      4,513      20,449     19,907
    Local property and other          6,700      6,163      21,778     21,929
                                    217,647    205,228     651,942    699,677

OPERATING INCOME                     15,959     16,887      62,559     60,572

OTHER INCOME
  Gain from sale of
    real estate, net                 10,789        -        10,789        -  
  Other                               2,105        340       3,604      1,970
                                     12,894        340      14,393      1,970

INCOME BEFORE INTEREST CHARGES       28,853     17,227      76,952     62,542

INTEREST CHARGES
  Long-term debt                      9,488      8,123      26,708     24,912
  Other interest charges              3,426      2,077       7,881      5,695
  Allowance for borrowed funds
    used during construction           (131)      (120)       (331)      (278)
                                     12,783     10,080      34,258     30,329
NET INCOME                           16,070      7,147      42,694     32,213
  Dividends on preferred shares         234        248         708        751
EARNINGS APPLICABLE
  TO COMMON SHARES                 $ 15,836   $  6,899    $ 41,986   $ 31,462
AVERAGE NUMBER OF COMMON
  SHARES OUTSTANDING             21,533,820 21,531,784  21,533,368 21,530,378

BASIC AND DILUTED EARNINGS
  PER COMMON SHARE                    $ .74      $ .32       $1.95      $1.46
DIVIDENDS DECLARED PER
  COMMON SHARE                        $.405      $.395       $1.215     $1.185


                            See accompanying notes.

<PAGE 5>


                          COMMONWEALTH ENERGY SYSTEM

                CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS

             FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1998 AND 1997

                      (Dollars in thousands - unaudited)

                                                       1998          1997


OPERATING ACTIVITIES
  Net income                                        $ 42,694       $ 32,213
  Gain from sale of real estate, net                 (10,789)           -
  Effects of noncash items -
    Depreciation and amortization                     55,037         50,000
    Deferred income taxes and investment
      tax credits, net                                (1,833)        (2,174)
    Earnings from corporate joint ventures            (1,300)        (1,229)
  Dividends from corporate joint ventures              1,698            545
  Change in working capital, exclusive of cash
    and interim financing                             31,992         40,719
  Transition costs deferral                          (31,288)           -  
  All other operating items                          (16,951)       (14,049)
Net cash provided by operating activities             69,260        106,025

INVESTING ACTIVITIES
  Purchase of total energy plant
    and related contracts                           (146,270)           -  
  Proceeds from sale of real estate                   22,175            -  
  Additions to property, plant and equipment
    (inclusive of AFUDC) -
      Electric                                       (24,645)       (23,055)
      Gas                                            (12,710)       (11,632)
      Other                                           (1,713)        (2,461)
Net cash used for investing activities              (163,163)       (37,148)

FINANCING ACTIVITIES
  Payment of dividends                               (26,904)       (26,302)
  Payment of short-term borrowings                   (20,025)       (57,425)
  Long-term debt issues                              152,500         35,000
  Long-term debt issues refunded                     (10,000)       (14,260)
  Sinking funds payments                              (2,317)        (2,316)
Net cash provided by (used for)
  financing activities                                93,254        (65,303)
Net increase (decrease) in cash                         (649)         3,574
Cash at beginning of period                            4,299          1,495
Cash at end of period                               $  3,650       $  5,069

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
  Cash paid during the period for:
    Interest (net of capitalized amounts)           $ 32,624       $ 29,082
    Income taxes                                    $ 27,286       $ 17,154

                            See accompanying notes.

<PAGE 6>


                          COMMONWEALTH ENERGY SYSTEM
             NOTES TO CONSOLIDATED 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 1,792 regular employees including 1,142 (64%)
    represented by various collective bargaining units covered by separate
    contracts with expiration dates ranging from March 2001 through April
    2003.

    Accounting Policies

    (a) Principles of Accounting

        The system's significant accounting policies are described in Note 2
    of Notes to Consolidated Financial Statements included in its 1997 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, certain 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 September 30,
    1998 and 1997, reflect, in the opinion of the System, all adjustments
    (consisting of only normal recurring accruals, except for a one-time
    charge recorded in June 1997 as described in Management's Discussion and
    Analysis of Financial Condition and Results of Operations) 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

        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

        The system's operating utility companies are regulated as to rates,
    accounting and other matters by various authorities, including the Federal
    Energy Regulatory Commission (FERC) and the Massachusetts Department of
    Telecommunications and Energy (DTE).

        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."  Regulated subsidiaries of
    the System have established various regulatory assets in cases where the
    DTE and/or the 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.  In the event the criteria for applying SFAS No. 71 are no longer
    met, the accounting impact would be an extraordinary, non-cash charge to
    operations of an amount that could be material.  Criteria that give rise
    to the discontinuance of SFAS No. 71 include: 1) increasing competition
    that restricts the system's ability to establish prices to recover
    specific costs, and 2) a significant change in the current manner in which
    rates are set by regulators from cost based regulation to another form of
    regulation.  These criteria are reviewed on a regular basis to ensure the
    continuing application of SFAS No. 71 is appropriate.  Based on the
    current evaluation of the various factors and conditions that are expected
    to impact future cost recovery, the system believes that its regulatory
    assets, including those related to generation, are probable of future
    recovery.

        As a result of electric industry restructuring, the system's retail
    electric companies discontinued application of accounting principles
    applied to their investment in electric generation facilities effective
    March 1, 1998.  The system will not be required to write off any of its
    generation-related assets, including regulatory assets.  These assets will
    be retained on the Consolidated Condensed Balance Sheets because the
    legislation and the DTE's plan for a restructured electric industry
    specifically provide for their recovery through a non-bypassable
    transition charge.










<PAGE 8>

                          COMMONWEALTH ENERGY SYSTEM

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

                                                    September 30, December 31,
                                                         1998        1997
                                                      (Dollars in thousands)

      Transition costs                                 $ 34,055    $    -  
      Maine Yankee unrecovered plant and
         decommissioning costs                           31,574      34,908
      Fuel charge stabilization                          27,283      29,655
      Connecticut Yankee unrecovered plant and
         decommissioning costs                           26,007      28,566
      Postretirement benefits costs                      24,459      25,475
      Power contract buy-out                             16,116      17,609
      Deferred income taxes                              13,212      13,089
      FERC Order 636 transition costs                     6,310       7,336
      Pilgrim litigation costs                            5,553       5,929
      Environmental costs                                 5,171       3,930
      Yankee Atomic unrecovered plant and
         decommissioning costs                            4,552       6,184
      Seabrook related costs                              2,339       4,324
      Other                                               1,974       1,859
                                                       $198,605    $178,864

         The regulatory liabilities, reflected in deferred credits in the
    accompanying Consolidated Condensed Balance Sheets and related primarily
    to deferred income taxes, were $13.4 million and $14.1 million at
    September 30, 1998 and December 31, 1997, respectively.

         In November 1997, the Commonwealth of Massachusetts enacted a
    comprehensive electric utility industry restructuring bill.  On November
    19, 1997, the System's electric subsidiaries filed a restructuring plan
    with the DTE.  The plan, approved by the DTE on February 27, 1998,
    provides that the System's retail electric subsidiaries, beginning March
    1, 1998, initiate a ten percent rate reduction for all customer classes
    and allow customers to choose their energy supplier.  As part of the plan,
    the DTE authorized the recovery of certain strandable costs and provides
    that certain future costs may be deferred to achieve or maintain the rate
    reductions that the restructuring bill mandates.  The legislation gives
    the DTE the authority to determine the amount of strandable costs that
    will be eligible for recovery.  Costs that will qualify as strandable
    costs and be eligible for recovery include, but are not limited to,
    certain above market costs associated with generating facilities, costs
    associated with long-term commitments to purchase power at above market
    prices from independent power producers and regulatory assets and
    associated liabilities related to the generation portion of the electric
    business.


<PAGE 9>

                          COMMONWEALTH ENERGY SYSTEM

         The cost of transitioning to competition will be mitigated, in part,
    by the sale of the system's non-nuclear generating assets.  The sale was
    approved by the DTE on October 30, 1998 and by the FERC on November 12,
    1998 (see the "Industry Restructuring - Electric" section under
    Management's Discussion and Analysis of Financial Condition and Results of
    Operations for further discussion of the sale).  The net proceeds from the
    sale of these assets will be used to mitigate transition costs.

         The system's ability to recover its transition costs will depend on
    several factors, including the aggregate amount of transition costs the
    system will be allowed to recover and the market price of electricity.
    Management believes that the system will recover its transition costs.  A
    change in any of the above listed factors could affect the recovery of
    transition costs and may result in a loss to the system.  For additional
    information relating to industry restructuring, see the "Industry
    Restructuring - Electric" section under Management's Discussion and
    Analysis of Financial Condition and Results of Operations.

(3) Commitments and Contingencies

    Capital Expenditures

         Construction Program

         The system is engaged in a continuous construction program presently
    estimated at $248.6 million for the five-year period 1998 through 2002. 
    Of that amount, $60.7 million is estimated for 1998.  The program is
    subject to periodic review and revision.

         Acquisition

         On June 1, 1998, Advanced Energy Systems, Inc. (AES), a wholly-owned
    subsidiary of the System, acquired for $146.3 million all of the issued
    and outstanding shares of capital stock of Harvard University's Medical
    Area Total Energy Plant, Inc. subsidiary (MATEP) and all rights under
    customer contracts owned by Harvard University.  MATEP's principal asset
    is a cogeneration plant that provides heating, chilled water service and
    electricity to several hospitals, medical research centers and teaching
    institutions in the 200-acre Longwood Medical Area of Boston pursuant to
    the contracts that were assigned to AES.  The purchase price was
    established through a sealed-bid auction process and the transaction was
    initially financed with a short-term bank loan of $150 million that was
    subsequently reduced with the proceeds from an equity contribution from
    the System to AES of approximately $40 million.  A permanent financing was
    completed on August 26, 1998 that consisted of $112.5 million in 23-year
    term notes at a rate of 6.92% with sinking fund payments scheduled to
    begin in 2003.  The notes are secured by long-term contracts between MATEP
    and its customers.

         MATEP had revenues of $58 million and net earnings of $7.3 million
    for the fiscal year ended June 30, 1997.  Results for MATEP are included
    in the accompanying Consolidated Condensed Financial Statements from the
    date of acquisition.


<PAGE 10>

                          COMMONWEALTH ENERGY SYSTEM

         The acquisition was accounted for under the purchase method of
    accounting.  The purchase price was allocated based on the fair value of
    assets acquired and resulted in the recognition of an intangible asset
    amounting to approximately $31 million that is being amortized on a
    straight-line basis over fifteen years.


         Based on unaudited data, the following pro forma summary presents the
    consolidated results of operations for the three and nine months ended
    September 30, 1998 and 1997 as if the acquisition had occurred at the
    beginning of the years presented:


                              Three Months Ended           Nine Months Ended
                                 September 30,               September 30,
                                1998          1997         1998        1997
                             (Dollars in thousands except per share amounts)

    Revenues                  $233,606    $239,386       $736,591    $806,227

    Net Income
       Applicable to
       Common Shares          $ 15,836    $  9,305       $ 40,253    $ 33,835

    Basic and Diluted
       Earnings per
       Common Share              $ .74       $ .43          $1.87       $1.57


         The pro forma results do not purport to be indicative of the results
    of operations that actually would have resulted had the acquisition been
    made at the beginning of the years presented, or of results that may occur
    in the future.


<PAGE 11>


                          COMMONWEALTH ENERGY SYSTEM

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.  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.

         Real estate consisting primarily of a ten acre site in Cambridge, MA
    was sold for $22.2 million and resulted in a net gain of $10.8 million. 
    Future plans for the site announced by the developer include a hotel,
    research and development facilities, laboratories, office, retail and
    entertainment space and housing.  This project represents further economic
    growth in our service territory.

         For the current nine-month period, cash flows from operating
    activities amounted to approximately $69.3 million and reflect net income
    of $42.7 million (which includes the net gain of $10.8 million from the
    aforementioned sale of real estate) and noncash items including
    depreciation of $45.5 million and amortization of $9.5 million.  The
    change in working capital since December 31, 1997, exclusive of cash and
    interim financing, amounted to $32 million and had a positive impact on
    cash flows from operating activities, reflecting a lower level of accounts
    receivable ($28.4 million) and unbilled revenues ($20.6 million) coupled
    with a higher level of other current liabilities ($18.1 million) and
    accrued taxes ($6.9 million). These factors were offset, in part, by a
    decline in accounts payable ($33.1 million) and a higher level of
    inventories ($2 million), prepaid taxes ($5.8 million) and other current
    assets ($1.7 million).

         Construction expenditures for the current nine-month period were
    approximately $39.1 million, including an allowance for funds used during
    construction (AFUDC) and nuclear fuel.  Construction expenditures and the
    preferred and common dividend requirements of the System ($26.9 million)
    were funded entirely with internally-generated funds.

         The system, through its Advanced Energy Systems, Inc. subsidiary
    (AES), purchased a total energy plant (MATEP), that was formerly owned and
    operated by Harvard University and is located in the Longwood Medical Area
    of Boston, and related contracts for $146.3 million on June 1, 1998.  This
    acquisition was originally financed through a $150 million term loan
    agreement.  The System, pursuant to a permanent financing plan, has
    provided a $40 million equity contribution to AES which was financed with

<PAGE 12>

                          COMMONWEALTH ENERGY SYSTEM

    a 2-year term note.  The permanent financing, completed in August 1998,
    consists of $112.5 million in 23-year term notes at a rate of 6.92% with
    sinking fund payments scheduled to begin in 2003.  The notes are secured
    by long-term contracts between MATEP and its customers.  It is projected
    that this new venture will increase system revenues by approximately $45
    million in 1998 and, on average, by approximately $65 million in the years
    1999 through 2002.

         On May 27, 1998, the System announced that three of its subsidiary
    companies (Commonwealth Electric Company, Cambridge Electric Light Company
    and Canal Electric Company) selected affiliates of Southern Energy New
    England, L.L.C., an affiliate of The Southern Company, to buy
    substantially all of their non-nuclear electric generating assets for $462
    million, an amount that is six times the book value of $79 million.  The
    sale was approved by the DTE on October 30, 1998 and by the FERC on
    November 12, 1998.  The net proceeds from the sale of these assets will be
    used to mitigate transition costs.

         Results of Operations

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

<PAGE 13>

                          COMMONWEALTH ENERGY SYSTEM

         A summary of the period to period changes in the principal items
    included in the Consolidated Condensed Statements of Income for the three
    and nine months ended September 30, 1998 and 1997 and unit sales for these
    periods are shown below:
                                          Three Months          Nine Months
                                      Ended September 30,  Ended September 30,
                                         1998 and 1997        1998 and 1997 
                                                 Increase (Decrease)
                                               (Dollars in thousands)
  Operating Revenues -
      Electric                          $   473      0.3 %  $(38,385)   (7.5)%
      Gas                                 1,438      3.4     (18,385)   (7.8)
      Steam and other                     9,580    379.9      11,022    82.2
                                         11,491      5.2     (45,748)   (6.0)
  Operating Expenses -
      Fuel and purchased power           (2,502)    (2.6)    (38,541)  (13.3)
      Cost of gas sold                     (245)    (1.0)    (12,079)   (9.4)
      Other operation and maintenance    13,333     22.3      (2,120)   (1.1)
      Depreciation                        2,378     19.7       4,614    11.4
      Taxes -
         Federal and state income        (1,082)   (24.0)        542     2.7
         Local property and other           537      8.7        (151)   (0.7)
                                         12,419      6.1     (47,735)   (6.8)

  Operating Income                         (928)    (5.5)      1,987     3.3

  Other Income                           12,554  3,692.4      12,423   630.6

  Income Before Interest Charges         11,626     67.5      14,410    23.0

  Interest Charges                        2,703     26.8       3,929    13.0

  Net Income                              8,923    124.8      10,481    32.5

  Dividends on preferred shares             (14)    (5.6)        (43)   (5.7)

  Earnings Applicable to Common Shares $  8,937    129.5    $ 10,524    33.4

  Unit Sales
    Electric - Megawatthours (MWH)
      Retail                             64,504      4.9      37,261     1.0
      Wholesale                         (82,983)    (8.1)    (91,105)   (3.1)
                                        (18,479)    (0.8)    (53,844)   (0.8)

    Gas - Billions of British Thermal
          Units (BBTU)
      Firm                                 (425)   (14.0)     (4,921)  (18.2)
      Interruptible and other               (61)    (6.0)        419    12.1
                                           (486)   (12.0)     (4,502)  (14.7)

<PAGE 14>

                          COMMONWEALTH ENERGY SYSTEM

         The following is a summary of electric unit sales and gas throughput
   for the periods indicated:
                                   Three Months Ended      Nine Months Ended
                                      September 30,          September 30,    
                                     1998      1997         1998      1997 
  Electric Sales - MWH
      Residential                   517,615    482,030   1,369,746  1,376,795
      Commercial                    733,428    700,817   1,934,289  1,891,519
      Industrial                    113,564    117,416     329,091    327,433
      Other                           5,558      5,398      17,201     17,319
         Total retail sales       1,370,165  1,305,661   3,650,327  3,613,066
      Wholesale sales               941,029  1,024,012   2,803,404  2,894,509
         Total                    2,311,194  2,329,673   6,453,731  6,507,575

  Gas Sales - BBTU
      Residential                     1,480      1,466      13,243     15,123
      Commercial                        818      1,012       6,333      7,776
      Industrial                        196        393       1,363      2,663
      Other                             108        156       1,228      1,526
         Total firm sales             2,602      3,027      22,167     27,088
      Interruptible                                                          
        and other                       959      1,020       3,876      3,457
         Total sales                  3,561      4,047      26,043     30,545
      Transportation                  1,075        498       6,474      4,627
         Total throughput             4,636      4,545      32,517     35,172

  Electric Revenues, Fuel and Purchased Power Costs

         Operating revenues from regulated operations for the current quarter
  and nine-month period were $8.8 million and $54.5 million lower,
  respectively, than the corresponding periods in 1997 due to the 10 percent
  rate reduction (further discussed below), decreases in electricity
  purchased for resale, fuel and transmission charges ($3.9 million and $38
  million, respectively), and a lower level of revenues associated with
  demand-side management programs.  The decline in these costs reflects a
  cost deferral of $2 million for the quarter and $31.3 million for the nine-
  month period in conjunction with the Company's restructuring plan as
  approved by the DTE.  As a result of industry restructuring, the Company
  has unbundled its rates, provided customers with a 10 percent rate
  reduction as of March 1, 1998 and has afforded customers the opportunity to
  purchase generation supply in the competitive market consistent with the
  electric industry restructuring legislation further discussed below. 
  Delivery rates are composed of a customer charge (to collect metering and
  billing costs), a distribution charge, a transition charge (to collect
  stranded costs), a transmission charge, an energy conservation charge (to
  collect costs for demand-side management programs) and a renewable energy
  charge.  Electricity supply services provided by the Company include
  optional standard offer service and default service.  Amounts collected
  through these various charges will be reconciled to actual expenditures on
  an on-going basis.  Operating revenues from two non-regulated subsidiaries
  increased by $9.3 million and $16.1 million for the current quarter and
  nine-month period.

         Total unit sales decreased in both the current quarter and nine-

<PAGE 15>

                          COMMONWEALTH ENERGY SYSTEM

  month period despite increases in retail sales as wholesale sales decreased
  by 8.1% and 3.1%, respectively.

  Gas Revenues and Cost of Gas Sold

         Operating revenues from regulated operations decreased by $1.5
  million and $29.7 million during the current quarter and nine-month period,
  respectively, due primarily to the considerable declines in firm unit
  sales.  Operating revenues from an unregulated subsidiary increased by $2.9
  million and $11.3 million for the current quarter and nine-month period. 
  Also affecting revenues in both periods was a lower average cost of gas.

         The decrease in unit sales to firm customers reflects the impact of
  the milder weather conditions experienced during 1998 on all customer
  segments.  The fluctuation in interruptible and other sales reflects the
  competitive market that exists today in the natural gas industry.

  Other Operating Expenses

         For the current quarter, other operation and maintenance increased
  by $13.3 million (22.3%) and reflects costs associated with new business
  development ($5.8 million), higher costs relating to the outsourcing of the
  information technology, telecommunications and network services function
  ($3 million) that includes costs associated with Year 2000 compliance,
  higher conservation and load management (C&LM) costs ($2.6 million), an
  increase in costs associated with non-regulated real estate operations
  ($1.5 million) and an increase in transmission charges ($1 million).  These
  increases were partially offset by a decline in insurance and employee
  benefits costs ($2.3 million) and labor savings resulting from a personnel
  reduction program (PRP) initiated during the second quarter of 1997 ($1
  million).  For the current nine-month period, other operation and mainten-
  ance decreased by $2.1 million (1.1%) reflecting the absence of a one-time
  charge ($17.7 million) related to the aforementioned PRP program, labor
  savings realized from the PRP ($5.4 million), a reduction in insurance and
  employee benefits costs ($3.8 million, the absence of storm damage costs
  related to an April 1997 blizzard ($2 million) and a decline in the pro-
  vision for bad debts ($1.6 million).  These decreases were offset, in part,
  by costs associated with new business development ($11.5 million), higher
  costs ($9.1 million) associated with information technology and related
  services as detailed above, increased C&LM costs ($2.6 million) and higher
  costs associated with non-regulated real estate operations ($1.2 million).

         Depreciation increased $2.4 million (19.7%) during the current
  quarter and $4.6 million (11.4%) in the nine-month period and reflects the
  treatment allowed for certain production plant pursuant to the electric
  industry restructuring legislation as well as a higher level of depreciable
  plant including the newly acquired MATEP facility.  Federal and state
  income taxes decreased $1.1 million (24%) during the current quarter and
  increased $542,000 (2.7%) for the nine-month period reflecting the level of
  pretax income related to continuing operations.  The tax impact from the
  sale of real estate ($6.3 million) was reflected as an offset to the gain
  from the sale in Other Income on the Consolidated Condensed Statements of
  Income.  The increase of $537,000 (8.7%) in local property and other taxes
  for the current quarter was due primarily to real estate taxes associated

<PAGE 16>

                          COMMONWEALTH ENERGY SYSTEM

  with MATEP and higher real estate tax rates and assessments offset, in
  part, by a decline in payroll taxes attributable to savings realized from
  the aforementioned PRP.

  Other Income and Interest Charges

         During the current quarter and nine-month period, other income
  increased by $12.6 million and $12.4 million due to the gain from the
  aforementioned sale of real estate ($10.8 million net of taxes).

         The increase in total interest charges for the current three and
  nine-month periods mainly reflects higher levels of short-term borrowings,
  the issuance of two new series of long-term debt in September 1997 and the
  issuance of 23-year term notes in August 1998 partially offset by maturing
  long-term debt and scheduled sinking fund payments.

  Industry Restructuring - Electric

         On November 25, 1997, the Governor of Massachusetts signed into law
  the Electric Industry Restructuring Act (the Act).  This legislation
  provided, among other things, that customers of retail electric utility
  companies who take standard offer service receive a 10 percent rate
  reduction and be allowed to choose their energy supplier, effective March
  1, 1998.  The Act also provides that utilities be allowed full recovery of
  transition costs subject to review and an audit process.  The rate
  reduction mandated by the legislation increases to 15 percent effective
  September 1, 1999 for customers who continue to take standard offer
  service.  A statewide ballot referendum that sought to repeal the
  legislation was defeated by a wide margin on November 3 of this year.

         The system filed a comprehensive electric restructuring plan with
  the DTE in November 1997, that was substantially approved by the DTE in
  February 1998.  The divestiture of the system's non-nuclear generation
  assets and the entitlements associated with its purchased power contracts
  is an integral part of the system's restructuring plan and is consistent
  with the Act.  While the system is encouraged with the treatment afforded
  net non-mitigable transition costs (which, for the system, are primarily
  the result of above-market purchased power contracts with non-utility
  generators) by the legislation and the DTE, the mandated rate reduction has
  had a significant impact on cash flows of the system.  However, the
  successful results of the generation auction, as discussed below, could
  significantly reduce the impact that the rate reductions will have on
  future cash flows.

         In March 1997, the system had submitted a report to the DTE that
  detailed the proposed auction process for selling its electric generation
  assets and the entitlements associated with purchased power contracts.  The
  auction process provided a market-based approach to maximizing stranded
  cost mitigation and minimizing the transition costs that retail customers
  will have to pay for stranded cost recovery.  A request for bids from
  interested parties was issued in August 1997 and an Offering Memorandum
  followed in October 1997.  Potential bidders examined all pertinent
  information related to the generating facilities and purchased power

<PAGE 17>

                          COMMONWEALTH ENERGY SYSTEM

  contracts in order to prepare and submit their first round of bids in mid-
  December.  Final binding bids were submitted in May 1998.

         On May 27, 1998, the System announced that three of its subsidiary
  companies (Cambridge Electric Light Company, Canal Electric Company and
  Commonwealth Electric Company) selected affiliates of Southern Energy New
  England, L.L.C. (Southern Energy), an affiliate of The Southern Company of
  Atlanta, Georgia, to buy substantially all of their non-nuclear electric
  generating assets for approximately $462 million (subject to certain
  adjustments at closing).  These facilities represent 984 megawatts (mw) of
  electric capacity and have an approximate book value of $79 million.

         The plants being sold include: Canal Unit 1 (566 mw) and a one-half
  interest in Canal Unit 2 (282.5 mw) located in Sandwich, MA and owned by
  Canal Electric; the Kendall Station facility (67 mw) and the adjacent
  Kendall Jets (46 mw), located in Cambridge, MA and owned by Cambridge
  Electric; five diesel generators (13.8 mw) in Oak Bluffs and West Tisbury
  on the island of Martha's Vineyard that are owned by Commonwealth Electric,
  and a 1.4 percent joint-ownership interest (8.9 mw) in Wyman Unit No. 4
  located in Yarmouth, ME, also owned by Commonwealth Electric.

         The system continues to evaluate bids related to the purchased power
  contracts.  The system is also evaluating the disposition of the Blackstone
  Station generating unit (15.3 mw) owned by Cambridge Electric and located
  in Cambridge, MA which is subject to a right of first offer held by Harvard
  University on any divestiture of the facility.

         On July 31, 1998, a formal divestiture filing was submitted to the
  FERC and the DTE that requested approval of the sale of the system's
  generating assets to Southern Energy and further proposes (subject to
  completion of the sale) that the current 10 percent rate reduction
  increase, effective January 1, 1999, to 12.1 percent for Commonwealth
  Electric and to 15.2 percent for Cambridge Electric.  In addition, the
  companies propose to increase the retail price of standard offer service,
  starting January 1, 1999, from the present rate of 2.8 cents per
  kilowatthour (kwh) to 3.5 cents.  At the same time that the price for
  standard offer service is increased, the transition charge for Commonwealth
  Electric's customers will decline from 4.08 cents per kwh to 3.13 cents and
  for Cambridge Electric's customers from 2.73 cents per kwh to 1.56 cents. 
  These proposed changes, which are intended to further reduce the cost of
  electricity to customers, to make the market increasingly more attractive
  for independent power suppliers to sell electricity directly to consumers,
  and to reduce the system's cost deferrals associated with the pricing of
  standard offer service, are based on a specific allocation methodology for
  the net proceeds from the sale of the Canal units.

         On October 30, 1998, the DTE approved the system's sale of its
  generating assets to Southern Energy.  The DTE, however, deferred ruling on
  the allocation of proceeds from the sale of Canal Units 1 and 2 between
  Cambridge Electric and Commonwealth Electric and on the rate of return to
  be paid to customers on the net proceeds from the sale over an eleven-year
  period.  These issues are not expected to impact the asset sale that is
  scheduled to close in the fourth quarter.  The FERC approved the sale on
  November 12, 1998.

<PAGE 18>

                          COMMONWEALTH ENERGY SYSTEM

  Industry Restructuring - Gas

         On July 18, 1997, the DTE directed the ten Massachusetts gas
  utilities, including Commonwealth Gas, to initiate a collaborative process
  that will establish guiding principles and specific procedures for
  unbundling rates and services for all customers.

         The DTE listed six principles that it considers important to the
  success of a competitive natural gas market that will provide safe and
  reliable service at the lowest possible cost to customers.  The natural gas
  market would: (1) provide the broadest possible choice; (2) provide all
  customers with an opportunity to share in the benefits of increased
  competition; (3) ensure full and fair competition in the gas supply market;
  (4) functionally separate supply from local distribution services; (5)
  support and further the goals of environmental regulation; and lastly (6)
  rely on incentive regulation where a fully competitive market cannot or
  presently does not exist.

         In addition, the DTE outlined several specific issues that it
  expects the collaborative to address: (1) services that can be offered on a
  competitive basis; (2) terms and conditions of service; (3) consumer
  protections and social programs; (4) mitigation of gas related and non-gas
  related transition costs; (5) third-party supplier qualifications; and (6)
  curtailment principles.  The DTE also suggested that the collaborative
  reconsider the pricing and provision of interruptible transportation
  services.

         On August 18, 1997, the DTE noted that the development of unbundling
  principles and procedures constitutes only a part of the effort necessary
  to develop full customer choice for gas service.  The DTE recognized that
  each local distribution company will be filing a comprehensive unbundling
  proposal at some later date.  In the interim, the DTE directed those
  companies that do not currently have unbundled rates, including Common-
  wealth Gas, to have such rates in effect no later than November 1, 1998.

         Commonwealth Gas and eight other gas utilities initiated the
  Massachusetts Gas Unbundling Collaborative (the Collaborative) on September
  15, 1997, to explore and develop generic principles to achieve the goals
  set forth by the DTE.  Collaborative participants represented a broad array
  of stakeholder interests including the utilities, natural gas marketers,
  interstate pipelines, producers, energy consultants, labor unions, consumer
  advocates and representatives for the DTE, the Massachusetts Attorney
  General's Office, and the Massachusetts Division of Energy Resources.

         On November 15, 1997, the Collaborative filed a status report with
  the DTE that outlined its progress in moving the gas industry to a more
  competitive structure that provides all customers with meaningful access to
  competitive markets consistent with public-policy objectives.  The status
  report summarized the substantive issues that had been the subject of
  Collaborative discussion, including: (1) the disposition of interstate
  pipeline capacity; (2) the unbundling of rates; (3) customer enrollment,
  billing, termination, and information exchange procedures; and, (4)
  consumer protections, low-income discounts, and competitive supplier

<PAGE 19>

                          COMMONWEALTH ENERGY SYSTEM

  registration.  The status report also established a schedule to implement a
  final unbundling plan by November 1, 1998.

         In accordance with that schedule, the Collaborative submitted to the
  DTE a Rate Unbundling Status Report on January 16, 1998.  The report
  detailed an overall process for developing unbundled rates consistent with
  the DTE's rate structure goals of efficiency, fairness, simplicity,
  continuity and earnings stability.  In response to the Collaborative's
  proposal, the DTE ordered Commonwealth Gas to submit, by April 15, 1998, a
  consensus-based settlement, or partial settlement, of unbundled rate
  tariffs designed according to the general concepts set forth in the report. 
  Subsequently, the DTE granted Commonwealth Gas an extension to reach a
  settlement with the Collaborative's participants.

         On March 18, 1998, the Collaborative filed a second status report
  that summarized the progress made by the Collaborative since it had last    
  updated the DTE on its activities.  The Collaborative reported that it had
  made substantial progress in the areas of rate unbundling and terms and
  conditions for unbundled services.  The report also described at least two
  policy issues, capacity disposition and cost responsibility, on which the
  Collaborative's participants require specific regulatory guidance before
  completing a comprehensive framework for the transition to a more
  competitive market structure.

         In response to the March report, the DTE issued a Notice of Inquiry
  to address the Collaborative's unresolved issues.  On May 1, 1998, Common-
  wealth Gas filed initial written comments in the proceeding arguing in
  favor of a mandatory capacity assignment proposal.  On June 8, 1998, the
  DTE, as part of the aforementioned Notice of Inquiry, received final
  comments regarding the feasibility of implementing comprehensive unbundling
  for all local distribution companies by November 1, 1998.  On June 29,
  1998, Commonwealth Gas and three other Massachusetts local distribution
  companies submitted unbundled rate settlements to the DTE for
  consideration.

           The DTE issued a procedural order regarding the Notice of Inquiry
  on July 2, 1998 which stated that the introduction of comprehensive un-
  bundling for all classes of customers for all local distribution companies
  is not feasible by November 1, 1998.  The DTE stated that unbundled rates
  for the four local distribution companies that filed settlements on June
  29, 1998 (including Commonwealth Gas) shall be in place by November 1, 1998
  and that comprehensive unbundling shall be implemented no later than April
  1, 1999.  Also, as part of the July 2, 1998 procedural order, the DTE
  ordered that a set of proposed Model Terms and Conditions be submitted by
  the Collaborative no later than July 15, 1998.  These Model Terms and
  Conditions were submitted on July 10, 1998 but a decision has not yet been
  issued by the DTE.

<PAGE 20>

                          COMMONWEALTH ENERGY SYSTEM

  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.  The DTE has approved recovery of costs associated with MGP sites. 
  Commonwealth Gas is also involved in certain other known or potentially
  contaminated sites where the associated costs may not be recoverable in
  rates.  For further information on other related environmental matters,
  refer to the System's 1997 Annual Report on Form 10-K.

  New Accounting Standards

         In June 1998, the Financial Accounting Standards Board issued
  Statement of Financial Accounting Standards No. 133 (SFAS No. 133),
  "Accounting for Derivative Instruments and Hedging Activities."  SFAS No.
  133 establishes accounting and reporting standards requiring that every
  derivative instrument (including certain derivative instruments embedded in
  other contracts possibly including fixed-price fuel supply and power
  contracts) be recorded on the balance sheet as either an asset or liability
  measured at its fair value.  SFAS No. 133 requires that changes in the
  derivative's fair value be recognized currently in earnings unless specific
  hedge accounting criteria are met.  Special accounting for qualifying
  hedges allows a derivative's gains and losses to offset related results on
  the hedged item in the income statement, and requires that a company must
  formally document, designate and assess the effectiveness of transactions
  that receive hedge accounting.

         SFAS No. 133 is effective for fiscal years beginning after June 15,
  1999 and may be implemented as of the beginning of any fiscal quarter after
  issuance but cannot be applied retroactively.  SFAS No. 133 must be applied
  to derivative instruments and certain derivative instruments embedded in
  hybrid contracts that were issued, acquired or substantively modified after
  December 31, 1997 and, at the company's election, before January 1, 1998.

         The system has not yet quantified the impacts of adopting SFAS No.
  133 on its financial statements and has not determined the timing of its
  method of adopting SFAS No. 133.

         In April 1998, the American Institute of Certified Public
  Accountants issued Statement of Position 98-5 "Reporting on the Costs of
  Start-Up Activities" (SOP 98-5).  SOP 98-5 provides guidance on the
  financial reporting of start-up and organization costs and requires that
  these costs be expensed as incurred.  The impact of SOP 98-5 is not
  expected to have a material impact on the system's results of operations or
  financial condition.

<PAGE 21>

                          COMMONWEALTH ENERGY SYSTEM

  Year 2000

         The Year 2000 issue is the result of computer programs being written
  using two digits rather than four to define the applicable year.  Any
  computer program that has date sensitive software may recognize a date
  using "00" as the year 1900 rather than the year 2000.  This could result
  in a temporary inability to process transactions or engage in normal
  business activities.  The system has been involved in Year 2000 compliancy
  since 1996.

         The system, on a coordinated basis and with the assistance of RCG
  Information Technologies and other consultants, is addressing the Year 2000
  issue.  The system has inventoried and assessed all date sensitive informa-
  tion and transaction processing computer systems and determined that a
  substantial portion of its software needed to be modified or replaced. 
  Plans have been developed and are being implemented to correct and test all
  affected systems, with priorities assigned based on the importance of the
  activity.  The system has identified the software and hardware
  installations that will be necessary.  All installations are expected to be
  completed and tested by mid-1999.  The system has also inventoried its non-
  information technology systems that may be date sensitive, (facilities,
  electric and gas operations, energy supply/production and distribution),
  that use embedded technology such as micro-controllers and micro-
  processors.  The system anticipates that these systems will be updated or
  replaced as necessary and tested by mid-1999.

         Modifying and testing the system's information and transaction
  processing systems from 1996 through 2000 is currently expected to cost $6
  to $7 million, including approximately $900,000 incurred through 1997 and
  $1.6 million spent during the first nine months of 1998.  Approximately
  $1.2 million is expected to be spent in the fourth quarter of this year and
  the balance of $2.5 to $3 million in 1999 and 2000.  Year 2000 costs have
  been expensed as incurred and will continue to be funded from operations.

         The system has initiated formal communications with its significant
  suppliers to determine the extent to which the system may be vulnerable to
  their failure to correct their own Year 2000 issues.  The system has not
  received enough responses to its survey to make an accurate assessment of
  the Year 2000 readiness of its suppliers.  Failure of the system's
  significant suppliers to address Year 2000 issues could have a material
  adverse effect on the system's operations, although it is not possible at
  this time to quantify the amount of business that might be lost or the
  costs that could be incurred by the system.

         In addition, parts of the global infrastructure, including national
  banking systems, electrical power grids, gas pipelines, transportation
  facilities, communications and governmental activities, may not be fully
  functional after 1999.  Infrastructure failures could significantly reduce
  the system's ability to acquire energy and its ability to serve its
  customers as effectively as they are now being served.  The system is
  identifying elements of the infrastructure that are critical to its
  operations and is obtaining information as to the expected Year 2000
  readiness of these elements.

<PAGE 22>

                          COMMONWEALTH ENERGY SYSTEM

         The system has started its contingency planning for critical
  operational areas that might be effected by the Year 2000 issue if
  compliance by the system is delayed.  System gas and electric operations
  currently have emergency operating plans as well as information technology
  disaster recovery plans as components of its standard operating procedures. 
  These plans will be enhanced to identify potential Year 2000 risks to
  normal operations and the appropriate reaction to these potential failures
  including contingency plans that may be required for any third parties that
  fail to achieve Year 2000 compliance.  All necessary contingency plans are
  expected to be completed by early 1999, although in certain cases,
  especially infrastructure failures, there may be no practical alternative
  course of action available to the system.

         The system is working with other energy industry entities, both
  regionally and nationally with respect to Year 2000 readiness and is
  cooperating in the development of local and wide-scale contingency
  planning.

         While the system believes its efforts to address the Year 2000 issue
  will be successful in avoiding any material adverse effect on the system's
  operations or financial condition, it recognizes that failing to resolve
  Year 2000 issues on a timely basis would, in a "most reasonably likely
  worst case scenario," significantly limit its ability to acquire and
  distribute energy and process its daily business transactions for a period
  of time, especially if such failure is coupled with third party or
  infrastructure failures.  Similarly, the system could be significantly
  effected by the failure of one or more significant suppliers, customers or
  components of the infrastructure to conduct their respective operations
  after 1999.  Adverse affects on the system could include, among other
  things, business disruption, increased costs, loss of business and other
  similar risks.

         The foregoing discussion regarding Year 2000 project timing,
  effectiveness, implementation and costs includes forward-looking statements
  that are based on management's current evaluation using available
  information.  Factors that might cause material changes include, but are
  not limited to, the availability of key Year 2000 personnel, the readiness
  of third parties, and the system's ability to respond to unforeseen Year
  2000 complications.

  Forward-Looking Statements

         This discussion contains statements which, to the extent it is not a
  recitation of historical fact, constitute "forward-looking statements" and
  is intended to be subject to the safe harbor protection provided by the
  Private Securities Litigation Reform Act of 1995.  A number of important
  factors affecting the System's business and financial results could cause
  actual results to differ materially from those reflected in the forward-
  looking statements or projected amounts.  Those factors include
  developments in the legislative, regulatory and competitive environment,
  certain environmental matters, demands for capital and new business
  development expenditures and the availability of cash from various sources.


<PAGE 23>

                          COMMONWEALTH ENERGY SYSTEM
                          PART II - OTHER INFORMATION

Item 1.     Legal Proceedings

       The System is subject to legal claims and matters arising from its
       course of business including when Cambridge Electric was an intervenor
       in an appeal at the Massachusetts Supreme Judicial Court (SJC) filed
       by the Massachusetts Institute of Technology (MIT) involving a DTE
       decision approving a customer transition charge (CTC) for the recovery
       of stranded investment costs.  By its terms, the CTC was terminated on
       March 1, 1998, coincident with the retail access date established by
       the Massachusetts Legislature in the Electric Industry Restructuring
       Act.  On September 18, 1997, the SJC remanded the CTC matter to the
       DTE for further consideration.  The SJC stated that, although recovery
       of prudent and verifiable stranded costs by utility companies is in
       the public interest and consistent with the Public Utility Regulatory
       Policies Act, the insufficiencies of the DTE's subsidiary findings
       precluded the SJC from undertaking a meaningful review of the DTE's
       calculations that formed the basis of the CTC.  The DTE is in the
       process of determining whether to hear additional evidence in the
       remand or to rely on the record and pleadings already filed.  On
       January 16, 1998 Cambridge Electric submitted to the DTE a customer
       exit charge rate tariff and sought a finding that the tariff would
       apply to MIT.  On July 23, 1998 the DTE issued a ruling which rejected
       the form of customer exit charge rate tariff, but opened a new
       investigation into whether MIT should be required to pay an exit
       charge, and, if so, what the amount of the exit charge should be. 
       Also, the DTE's investigation includes whether this case should be
       joined with the remand proceeding currently before the DTE.  This
       issue is discussed more fully in the System's 1997 Annual Report on
       Form 10-K.  At this time, management is unable to predict the ultimate
       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 24>

                          COMMONWEALTH ENERGY SYSTEM

Item 6.      Exhibits and Reports on Form 8-K

       (a)   Exhibits

             Exhibit 3 - Declaration of Trust

                     Commonwealth Energy System (Registrant)

3.1.1        Filed herewith as Exhibit 1 is the Declaration of Trust of CES
             dated December 31, 1926, as amended by vote of the shareholders
             and trustees May 7, 1998.

             Exhibit 27 - Financial Data Schedule

             Filed herewith as Exhibit 2 is the Financial Data Schedule for
             the nine months ended September 30, 1998.

       (b)   Reports on Form 8-K

             None.

<PAGE 25>


                          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:  November 13, 1998