FINANCIAL STATEMENTS AND
                      REPORT OF INDEPENDENT
                  CERTIFIED PUBLIC ACCOUNTANTS
                     THE UNITIL CORPORATION
                          TAX DEFERRED
                   SAVINGS AND INVESTMENT PLAN
                December 31, 1999, 1998 and 1997
       Report of Independent Certified Public Accountants


Administrator of
The UNITIL Corporation Tax Deferred
  Savings and Investment Plan


           We  have  audited the accompanying statements  of  net
assets  available  for  benefits of The  UNITIL  Corporation  Tax
Deferred  Savings and Investment Plan (the "Plan") as of December
31,  1999 and 1998, and the related statements of changes in  net
assets available for benefits for each of the three years in  the
period  ended December 31, 1999.  These financial statements  are
the  responsibility of the Plan's management.  Our responsibility
is  to express an opinion on these financial statements based  on
our audits.

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

           In  our opinion, the financial statements referred  to
above  present fairly, in all material respects, the  net  assets
available  for  benefits of The UNITIL Corporation  Tax  Deferred
Savings and Investment Plan as of December 31, 1999 and 1998, and
the  changes in net assets available for benefits for each of the
three  years in the period ended December 31, 1999, in conformity
with generally accepted accounting principles.

                                               GRANT THORNTON LLP



Boston, Massachusetts
June 9, 2000




         The UNITIL Corporation Tax Deferred Savings and Investment Plan

                 STATEMENT OF NET ASSETS AVAILABLE FOR BENEFITS

                                December 31, 1999 (in dollars)
                                                                                               Putnam
                 UNITIL                        Putnam                     Putnam               Inter-    George   Inter-
               Corporation          Putnam     Stable    Putnam   Putnam   New                 national  Putnam  national
                 Stock      Loan    Growth &   Value     Voyager  Income   Opportunity   S&P   Growth    Fund of  Voyager
                 Fund       Fund    Income     Fund      Fund     Fund     Fund          500   Fund      Boston    Fund     Total
                                                                                      

Participant
Loan
Receivable                526,954                                                                                           526,954

Investment  at
market value                       3,182,499  2,924,252 9,090,933 279,664 3,230,404  1,288,537 1,063,755 34,879  350,279 21,445,202

Employer securities
(UNITIL common
stock at market
value)         4,604,611                                                                                                  4,604,611

Net assets
available
for
benefits       4,604,611  526,954  3,182,499  2,924,252 9,090,933 279,664 3,230,404  1,288,537 1,063,755 34,879 350,279  26,576,767



The accompanying notes are an integral part of this statement.
The UNITIL Corporation Tax Deferred Savings and Investment Plan STATEMENT OF NET ASSETS AVAILABLE FOR BENEFITS December 31, 1998 (in dollars) Putnam UNITIL Putnam Putnam Inter- Corporation Putnam Stable Putnam Putnam New national Stock Loan Growth & Value Voyager Income Opportunity S&P Growth Fund Fund Income Fund Fund Fund Fund 500 Fund Total Participant Loan Receivable 519,634 519,634 Investments at market value 3,372,521 2,691,166 6,095,519 279,913 1,640,789 965,459 597,051 15,642,418 Employer securities (UNITIL common stock at market value) 3,153,429 3,153,429 Net assets available for benefits 3,153,429 519,634 3,372,521 2,691,166 6,095,519 279,913 1,640,789 965,459 597,051 19,315,481 The accompanying notes are an integral part of this statement.
The UNITIL Corporation Tax Deferred Savings and Investment Plan STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS For the year ended December 31, 1999 (in dollars) Putnam UNITIL Putnam Putnam Inter- George Inter- Corporation Putnam Stable Putnam Putnam New Oppor- national Putnam national Stock Loan Growth & Value Voyager Income tunity S&P Growth Fund of Voyager Pending Fund Fund Income Fund Fund Fund Fund 500 Fund Boston Fund Account Total Additions to net assets attributed to: Investment income Interest 45,973 45,973 Dividends 174,253 324,391 162,781 793,503 17,563 246,447 37,820 2,909 16,527 1,776,194 Other receipts 11,033 25,243 18,371 26,958 14,249 1,036 3,450 5,694 100,340 Net apprec- iation 1,298,371 (278,802) 2,442,805 (23,335) 1,127,539 218,581 345,466 (4,748) 99,875 5,225,752 1,483,657 45,973 70,832 181,152 3,263,266 (5,772) 1,388,235 219,617 386,736 (1,839) 116,402 5,694 7,148,259 Contributions: Participant 153,398 177,566 59,363 297,141 37,501 264,427 98,437 96,822 1,047 7,576 1,193,278 Employer 57,623 58,336 23,587 103,055 13,808 84,989 33,507 29,637 199 1,736 406,477 Rollover 4,888 7,600 17,471 26,583 2,337 8,143 26,346 5,227 98,595 215,909 243,502 100,421 426,779 53,646 357,559 158,290 131,686 1,246 9,312 1,698,350 Total additions 1,699,566 45,973 314,334 281,573 3,690,045 47,874 1,745,794 377,907 518,422 (593) 125,714 5,694 8,852,609 Deductions: Deductions from net assets attributed to: Benefits to participants (203,200) (171,923)(471,864)(439,415) (27,389) (97,321) (30,841) (34,961) (1,476,914) Loan distributions (6,639) (6,639) Other/ forfeitures (11,083) (25,524) (17,056) (27,511) (15,800) (1,036) (3,760) (5,694) (101,770) Total deductions (214,283) (6,639) (197,447)(488,920)(466,926) (27,389)(113,121)(31,877) (38,721) (5,694)(1,585,323) Net Increase (decrease) prior to interfund transfers 1,485,284 39,334 116,887 (207,347)3,223,119 20,485 1,632,673 346,030 479,701 (593) 125,714 7,261,286 Interfund transfers (34,101)(32,014) (306,909) 440,433 (227,705)(20,734) (43,058)(22,952) (12,997) 35,472 224,565 Net increase (decrease) 1,451,182 7,320 (190,022) 233,086 2,995,414 (249)1,589,615 323,078 466,704 34,879 350,279 7,261,286 Beginning balance 3,153,429 519,634 3,372,521 2,691,166 6,095,519 279,913 1,640,789 965,459 597,051 19,315,481 Ending balance 4,604,611 526,954 3,182,499 2,924,252 9,090,933 279,664 3,230,404 1,288,537 1,063,755 34,879 350,279$ 26,576,767 The accompanying notes are an integral part of this statement.
The UNITIL Corporation Tax Deferred Savings and Investment Plan STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS For the year ended December 31, 1998 UNITIL Corporation Putnam Putnam Putnam Stock Loan Growth & Stable Voyager Fund Fund Income Value Fund Fund Assets Additions to net assets attributed to: Investment income Interest - $43,495 - - - Dividends 164,029 - $300,125 150,048 406,027 Other Receipts 123,298 - - 116,106 49,534 Net appreciation (depreciation) in full value of investmentS 162,559 - 177,037 480 766,564 449,886 43,495 477,162 266,634 1,222,125 Contributions: Participants 141,055 - 157,677 51,903 290,924 Employers' 53,677 - 52,496 22,401 99,552 Rollovers 19,855 - 32,765 20,973 42,123 214,587 - 242,938 95,277 432,599 Total Additions 644,473 43,495 720,100 361,911 1,654,724 Deductions: Deductions from net assets attributed to: Benefits to participants (205,520) - (659,713) (370,191) (257,851) Loan distributions - (9,413) - - - Other/forfeitures (124,030) - (376) (125,652) (50,851) Total deductions (329,550) (9,413) (660,089) (495,843) (308,702) Net Increase (decrease) prior to interfund transfers 334,923 34,082 60,011 (133,932) 1,346,022 Interfund transfers (143,247) 782 (208,379) 388,778 (43,795) Net (Decrease) Increase 191,676 34,864 (148,368) 254,846 1,302,227 Net assets available for benefits: Net assets available, beginning of year 2,961,753 484,770 3,520,889 2,436,320 4,793,292 Net assets available, end of year $3,153,429 $519,634 $3,372,521 $2,691,166 $6,095,519 Putnam Putnam Putnam New Putnam International Income Opportunity S & P Growth Fund Fund 500 Fund Total Assets Additions to net assets attributed to: Investment income Interest - - - - 43,495 Dividends $ 18,425 62,779 - 17,510 1,118,943 Other Receipts - - - - 288,938 Net appreciation (depreciation) in fair value of investments (9,501) 269,944 180,927 69,154 1,617,164 8,924 332,723 180,927 86,664 3,068,540 Contributions: Participants 37,987 273,985 80,293 101,015 1,134,839 Employers' 13,265 90,451 26,043 29,698 387,583 Rollovers 2,471 23,935 10,427 6,382 158,931 53,723 388,371 116,763 137,095 1,681,353 Total Additions 62,647 721,094 297,690 223,759 4,749,893 Deductions: Deductions from net assets attributed to: Benefits to participants (61,606) (170,391) (34,429) (20,644) (1,780,345) Loan distributions - - - - (9,413) Other/forfeitures (205) (2,063) (127) (430) (303,734) Total deductions (61,811) (172,454) (34,556) (21,074) 2,093,492 Net Increase (decrease) prior to interfund transfers 836 548,640 263,134 202,685 2,656,401 Interfund transfers 18,276 (119,775) 153,471 (46,111) - Net (Decrease) Increase 19,112 428,865 416,605 156,574 2,656,401 Net assets available for benefits: Net assets available, beginning of year 260,801 1,211,924 548,854 440,477 16,659,080 Net assets available, end of year $279,913 $1,640,789 $965,459 $597,051 $19,315,481 The accompanying notes are an integral part of this statement. The UNITIL Corporation Tax Deferred Savings and Investment Plan STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS For the year ended December 31, 1997 UNITIL Corporation Putnam Putnam Putnam Stock Loan Growth & Stable Voyager Fund Fund Income Value Fund Fund Additions to net assets attributed to: Investment income Interest $ 1,868 $43,301 - - $ 38 Dividends 173,232 - $445,715 151,356 286,001 Other Receipts 286 - 383 13,010 317 Net appreciation (depreciation) in fair value of investments 554,675 - 155,195 - 691,115 730,061 43,301 601,293 164,366 977,471 Contributions: Participants 148,292 - 135,199 55,201 278,585 Employers' 58,668 - 47,997 25,045 99,119 Rollovers 5,185 - 19,680 3,137 15,692 212,145 - 202,876 83,383 393,396 Total Additions 942,206 43,301 804,169 247,749 1,370,867 Deductions: Deductions from net assets attributed to: Benefits to participants (149,037) - (52,101) (31,643) (235,343) Loan distributions - (24,512) - - - Other/forfeitures (2,729) - (3,739) (1,124) (4,521) Total deductions (151,766) (24,512) (55,840) (32,767) (239,864) Net Increase (decrease) prior to interfund transfers 790,440 18,789 748,329 214,982 1,131,003 Interfund transfers (642,063) 31,463 469,225 (290,054) (170,482) Net (Decrease) Increase 148,377 50,252 1,217,554 (75,072) 960,521 Net assets available for benefits: Net assets available, beginning of year 2,813,376 434,518 2,303,335 2,511,392 3,832,771 Net assets available, end of year $2,961,753 $484,770 $3,520,889 $2,436,320 $4,793,292 Putnam Putnam Putnam New Putnam International Income Opportunity S & P Growth Fund Fund 500 Fund Total Additions to net assets attributed to: Investment income Interest $ 38 $ 38 $ 38 $ 45,321 Dividends $ 13,037 26,540 - 25,351 1,121,232 Other Receipts - - - - 13,996 Net appreciation (depreciation) in fair value of investments 1,890 145,287 89,239 11,401 1,648,802 14,927 171,865 89,277 36,790 2,829,351 Contributions: Participants 35,496 278,956 62,139 82,843 1,076,711 Employers' 13,011 92,962 22,691 27,127 386,620 Rollovers 2,171 12,197 5,006 3,698 66,766 50,678 384,115 89,836 113,668 1,530,097 Total Additions 65,605 555,980 179,113 150,458 4,359,448 Deductions: Deductions from net assets attributed to: Benefits to participants (6,430) (24,726) (1,784) (5,436) (506,500) Loan distributions - - - - (24,512) Other/forfeitures (36) (931) (282) (189) (13,551) Total deductions (6,466) (25,657) (2,066) (5,625) (544,563) Net Increase (decrease) prior to interfund transfers 59,139 530,323 177,047 144,833 3,814,885 Interfund transfers 49,390 170,643 214,922 166,956 - Net (Decrease) Increase 108,529 700,966 391,969 311,789 3,814,885 Net assets available for benefits: Net assets available, beginning of year 152,272 510,958 156,885 128,688 12,844,195 Net assets available, end of year $260,801 $1,211,924 $548,854 $440,477 $16,659,080 The accompanying notes are an integral part of this statement. The UNITIL Corporation Tax Deferred Savings and Investment Plan NOTES TO FINANCIAL STATEMENTS December 31, 1999, 1998 and 1997 NOTE A - DESCRIPTION OF PLAN The following description of The UNITIL Corporation and subsidiaries (the "Company") Tax Deferred Savings and Investment Plan (the "Plan") provides only general information. Participants should refer to the Plan agreement for a more complete description of the Plan's provisions. General The Plan is a defined contribution plan covering substantially all full- time employees of the Company and its wholly owned subsidiaries UNITIL Service Corporation, Concord Electric Company, Exeter and Hampton Electric Company and Fitchburg Gas and Electric Light Company (the "subsidiaries"), who satisfy the eligibility requirements. It is subject to the provisions of the Employee Retirement Income Security Act of 1974 ("ERISA"). During 1998, the Plan Administrator directed the transfer of all Plan assets from the Fleet Boston to Putnam Investments ("Putnam"). The transfer was made as a result of a change in custodianship of the assets. Contributions A member may authorize a Basic Employee Contribution from 1% to 15% with a maximum contribution not to exceed $10,000 for 1999. The Employer shall contribute as of December 31, of each plan year from current or accumulated net profits on behalf of each member participating in the Plan on December 31, of each plan year, an amount equal to 100% of the first 3% of salary the employee puts into the plan (except Fitchburg Gas and Electric Light Company Union Employees whose matching is as follows: first year 1%, second year 2%, third year and after 3%). Participant Accounts Each participant's account is credited with the participant's contribution and allocations of (a) the Company's contribution and, (b) Plan earnings, and charged (as applicable) with an allocation of administrative expenses. Allocations are based on participant earnings or account balances, as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account. The Plan administrator will pay for substantially all expenses of the Plan. The UNITIL Corporation Tax Deferred Savings and Investment Plan NOTES TO FINANCIAL STATEMENTS - CONTINUED December 31, 1999, 1998 and 1997 NOTE A - DESCRIPTION OF PLAN - Continued Vesting Participants are immediately vested in their contributions plus actual earnings thereon. Vesting in the Company's matching and discretionary contribution portion of their accounts plus actual earnings thereon is based on years of continuous service. A participant is 100 percent vested after three years of credited service. If a participant terminates employment for any reason other than disability or retirement, he will be entitled to the full amount of contributions he has deposited, plus a percentage of his account balance derived from employer contributions based upon the following schedule: Year of Service % Vested 0-1 0% 1-2 33% 2-3 67% 3+ 100% A member will become 100% vested in his account as a result of disability, death or retirement. Participant Loans Receivable Participants may borrow from their fund accounts a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50% of their account balance. Net loan transactions are treated as a transfer to (from) the Investment Fund from (to) the Participant Loan Fund. Loan terms range from 1-5 years or up to 25 years for the purchase of primary residence. The loans are secured by the balance in the participant's account and bear interest at a rate of prime plus one percent (1%). Principal and interest is paid ratably through monthly payroll deductions. Payment of Benefits On termination of service due to death, disability or retirement, a participant may elect to receive either a lump-sum amount equal to the value of the participant's vested interest in his or her account, or annual installments over a fixed number of calendar quarters or years. Forfeitures A member who terminates his employment prior to becoming eligible for benefits and does not have a 100% vested right to Company contributions, forfeits the amounts not vested. Such forfeited amounts are used to reduce future Company contributions. The UNITIL Corporation Tax Deferred Savings and Investment Plan NOTES TO FINANCIAL STATEMENTS - CONTINUED December 31, 1999, 1998 and 1997 NOTE A - DESCRIPTION OF PLAN - Continued Upon enrollment and reenrollment, each participant shall direct that his contributions are to be invested in accordance with any of the following investment options. UNITIL Corporation Common Stock Fund (UNITIL Corporation, no par value common stock). Putnam S & P 500: This fund invests primarily in publicly traded common stocks, to achieve a return that closely approximates the return of the Standard & Poors 500- composite stock price index. Putnam Stable Value Fund: This fund invests in high-quality guaranteed investment contracts (GIC's) issued by insurance companies and banks with the objective to achieve a high current income. Putnam Income Fund: This fund invests in debt securities, including both government and corporate obligations, preferred stocks and dividend - paying common stocks. Putnam Fund for Growth and Income: This fund seeks capital growth and current income by investing primarily in common stocks that offer potential for capital growth and current income. Putnam New Opportunities Fund: This fund seeks long-term capital appreciation through the investment in common stocks with the potential of above-average long-term growth. Putnam Voyager Fund: This fund seeks capital appreciation for investors willing to assume above-average risk in return for above-average capital growth potential. Putnam International Growth Fund: This fund seeks capital appreciation by investing primarily in equity securities of companies located in a country other than the United States. George Putnam Fund of Boston: This fund seeks to provide a balanced investment comprised of a well-diversified portfolio of stocks and bonds that will produce both capital growth and current income. Putnam International Voyager Fund: This fund seeks long-term capital appreciation by investing primarily in smaller company stocks in a variety of countries outside the United States. Participants may change their investment options daily. The UNITIL Corporation Tax Deferred Savings and Investment Plan NOTES TO FINANCIAL STATEMENTS - CONTINUED December 31, 1999, 1998 and 1997 NOTE A - DESCRIPTION OF PLAN - Continued The number of participants in each fund at December 31 was as follows: 1999 1998 Unitil Corporation Stock Fund 179 245 Putnam Growth & Income Fund 262 262 Putnam Stable Value Fund 179 177 Putnam Voyager Fund 329 305 Putnam Income Fund 104 102 Putnam New Opportunities Fund 250 234 Putnam S&P 500 Fund 146 127 Putnam International Growth Fund 147 133 George Putnam Fund of Boston 7 N/A Putnam International Voyager Fund 29 N/A NOTE B - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Effective Date The Plan's effective date is July 1, 1987, as amended effective May 8, 1992 and January 1, 1994. The Plan as amended effective May 8, 1992, provided for the merger of the Fitchburg Gas and Electric Tax Deferred Savings and Investment Plan with The Plan. The Plan as amended effective January 1, 1994, provided for the merger of the Fitchburg Gas and Electric Light Company Union Tax Deferred Savings and Investment Plan into the Plan. Basis of Accounting The financial statements of the Plan are prepared under the accrual method of accounting. The UNITIL Corporation Tax Deferred Savings and Investment Plan NOTES TO FINANCIAL STATEMENTS - CONTINUED December 31, 1999, 1998 and 1997 NOTE B - SUMMARY OF ACCOUNTING POLICIES - Continued Management Estimates In preparing the financial statements in conformity to generally accepted accounting principles, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and revenues and expenses during the reporting period. Actual results could differ from those estimates. Investment Valuation and Income Recognition The Plan is administered by a trustee. The Plan's investments (including investments bought, sold and held during the year) are carried at current fair value. The difference between current fair value and the cost of investments are included in net appreciation or (depreciation) in fair value of investments. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Payment of Benefits Benefits are recorded when paid. Eligibility Employees are eligible for membership on either January 1 or July 1 coincident with or the next day following on which they have both: (1)Attained the age of 18, and (2)Completed 1000 hours of credited service Normal Retirement Date A participant's normal retirement benefit date is the date he/she reaches his/her 65th birthday or, if later, the 10th anniversary of the date he/she becomes a participant. The UNITIL Corporation Tax Deferred Savings and Investment Plan NOTES TO FINANCIAL STATEMENTS - CONTINUED December 31, 1999, 1998 and 1997 NOTE C - PLAN TERMINATION Although it has not expressed any intent to do so, the Company has the right under the Plan to terminate the Plan at any time subject to the provision of ERISA with respect to its employees by a written resolution with a copy delivered to the trustee. In the event of a Plan termination, participants will become fully vested in their accounts. NOTE D - DETERMINATION LETTER The Internal Revenue Service has determined and informed the Company by a letter dated May 9, 1995, that the Plan and related trust are designed in accordance with applicable sections of the Internal Revenue Code (IRC). The Plan was amended in July 1998 and the Company believes that this amendment will not affect the status of the Plan with the IRC. Consent of Independent Certified Public Accountants We have issued our report dated June 9, 2000, accompanying the financial statements of The UNITIL Corporation Tax Deferred Savings and Investment Plan contained in the information required by Form 11-K filed as an exhibit to the UNITIL Corporation Annual Report on Form 10-K for the year ended December 31, 1999. We herby consent to the incorporation by reference of said report in the Registration Statement of The UNITIL Corporation Tax Deferred Savings and Investment Plan on Form S-8 (File No. 33-24436). GRANT THORNTON LLP Boston, Massachusetts June 9, 2000