EXHIBIT 8.1 
                               ARTHUR ANDERSEN LLP 
                               One Financial Plaza 
                             Hartford CT 06103-2699 
                                 (860) 280-0500 
    
    
    
   December 27, 1996                                                
    
    
   Connecticut Natural Gas Corporation 
   100 Columbus Boulevard 
   Hartford, CT 06103-2805 
    
   Re:  Exchange of CTG Stock for CNG Stock 
    
   Gentlemen: 
    
   You have requested our opinion regarding certain U.S. federal income tax
   consequences of the proposed exchange (Exchange) of common stock of
   Connecticut Natural Gas Corporation, a Connecticut corporation (CNG), for
   common stock of CTG Resources, Inc., a Connecticut corporation (CTG). 
   Specifically, you have requested our opinion regarding whether the Exchange
   will qualify as an exchange described in Section 351 (a) of the Internal
   Revenue Code of 1986, as amended, whether CNG's shareholders will recognize
   any income or gain as a consequence of the Exchange, and whether CTG will
   recognize any income or gain as a consequence of the Exchange.1  Our opinion
   does not address any tax consequences of the Exchange to any person other
   than CNG's shareholders and CTG. 
    
   In rendering our opinion, we have relied upon the accuracy and completeness
   of the facts assumptions and representations (without regard to any
   limitation based on knowledge or belief) (i) set forth herein, (ii)
   contained in the documents listed on Exhibit A to this opinion, (iii) set
   forth in the representation letter, dated December 27, 1996, signed by an
   appropriate officer of CNG and CTG, and (iv) contained in the Arthur
   Andersen Technical Memorandum, dated December 27, 1996.  You have
   represented that such facts, assumptions and representations are true,
   correct and complete and that we have been provided all facts, documents and
   other materials relevant to the Exchange.  However, we have not
   independently audited or otherwise verified any of these facts, documents or
   other materials.  A misstatement or omission of any fact or a change or
   amendment in any of the facts, assumptions or representations we have relied
   upon, may require a modification of all or a part of this opinion.  In
   addition, our opinion is based on the facts as represented to us as of the
   date of this letter.  Any changes in the facts or form of the transaction
   between the date of this letter and the actual closing of the transaction
   may require a modification of all or part of this opinion.  We have no
                              

               1    All references cited as "Section" or "Code" are to the
                    Internal Revenue Code of 1986, as amended, unless
                    otherwise indicated.





   responsibility to update this opinion for events, transactions,
   circumstances or changes in any of the facts, assumptions or representations
   occurring after this date. 
    
   I.    SCOPE OF OPINION 
    
   Our opinion is based solely on our interpretation of the Code; related U.S.
   federal income tax regulations thereunder; relevant court decisions; and
   Internal Revenue Service (Service) published Revenue Rulings; Private Letter
   Rulings; Technical Advice Memoranda; General Counsel Memoranda; and Revenue
   Procedures as of the date of this opinion.  U.S. federal income tax laws and
   their interpretations are subject to change, which changes could adversely
   affect this opinion. 
    
   If there is a change in the Code, the regulations and published rulings
   thereunder, the current administrative rulings, or in the prevailing
   judicial interpretation of the foregoing, the opinion expressed herein would
   necessarily have to be reevaluated in light of any such changes.  Our
   opinion is as of the date of this letter and we have no responsibility to
   update this opinion for changes in the above-listed law or authorities
   occurring after this date. 
    
   Our opinion is limited to the U.S. federal income tax consequences of the
   Exchange listed above as it relates solely to CNG's shareholders, CTG and
   CNG.  Our opinion is not intended to address any other federal income, non-
   income, state, local or foreign tax issues, if any, that may be relevant to
   CNG, CTG, their shareholders or related entities.  Further, except as
   expressly provided below, our opinion is not intended to address the
   potential tax ramifications to CTG, CNG and related entities resulting from
   any other transaction, including the contemplated corporate restructuring
   transactions described herein.  We also express no opinion on nontax issues
   such as corporate law or securities law matters. 
    
   Our opinion reflects what we regard to be the material U.S. federal income
   tax consequences of the Proposed Exchange as described herein; nevertheless,
   it is an opinion only and should not be taken as an assurance of the
   ultimate tax treatment.  The Service, of course, is not bound by this
   opinion. 
    
   II.    CURRENT STRUCTURE/BACKGROUND 
    
   CNG is a public utility engaged primarily in the regulated distribution and
   sale of natural gas in Hartford and twenty other cities and towns in central
   Connecticut and in Greenwich.  CNG provides gas service to approximately
   140,000 customers.  CNG's business operations are regulated by the
   Connecticut Department of Public Utility Control (DPUC). 
    
   As of December 6, 1996, CNG had issued 10,690,977 shares of its $3.125 par
   common stock, of which 10,690,977 shares were outstanding.  CNG had also
   issued 915,204 shares of $3.125 par value, 8% noncallable preferred stock of
   which 138,360 shares were outstanding.  Holders of CNG common stock or 8%
   noncallable preferred stock are entitled to one vote per share with respect

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   to the election of members of the Board of Directors.  As of such date, CNG
   also had issued 9,999,634 shares of $100 par value, callable 6% Series B
   preferred stock, of which 4,667 shares were outstanding.  Holders of the 6%
   preferred stock are not entitled to vote with respect to the election of
   members of the Board of Directors.  There will be no material change in the
   number of shares of CNG common stock, 8% preferred stock or 6% preferred
   stock outstanding between December 6, 1996 and the closing of the Exchange. 
    
   CTG was formed on October 31, 1996 for the purpose of effectuating the
   Exchange.  On such date, CNG contributed nominal assets to CTG in exchange
   for all of the common stock of CTG.  CTG has issued and outstanding 100
   shares of common stock.  It has no other shares of stock outstanding.  CTG
   is currently inactive. 
    
   CNG has two wholly owned subsidiaries, CNG Realty Corp., and The Energy
   Network, Inc. (TEN), in addition to CTG. 
    
   CNG Realty Corp., a wholly owned subsidiary of CNG, is a single purpose
   corporation which owns title to CNG's Operating and Administrative Center
   located in downtown Hartford.  This facility is leased to CNG. 
    
   TEN is CNG's principal non-regulated subsidiary.  TEN, and one of its four
   wholly owned subsidiaries, The Hartford Steam Company, are primarily engaged
   in providing steam and hot water for heating and chilled water for cooling
   to a significant number of large buildings in the downtown and capitol areas
   of Hartford, Connecticut through an underground pipe system.  TEN's wholly-
   owned subsidiary, ENServe Corporation, offers residential, commercial and
   industrial energy management services and heating and cooling equipment and
   installations throughout Connecticut.  TEN's wholly-owned subsidiary, ENI
   Gas Services, Inc., owns a one-third interest in KBC Energy Services of New
   England (KBC) joint venture partnership.  KBC markets natural gas supplies,
   other energy sources and energy management related services on a
   nonregulated basis to commercial and industrial end users, primarily in New
   England.  ENI Transmission Company (ENIT) recently became a wholly owned
   subsidiary of TEN as a result of the contribution of its stock to TEN by
   CNG.  ENIT owns a 4.87% share in the Iroquois Gas Transmission System
   Partnership (Iroquois).  Iroquois operates a natural gas pipeline that first
   delivered gas in December, 1991 and reached full operations in 1992. 
    
   III. EXCHANGE AND RELATED RESTRUCTURING 
    
   Pursuant to Sec. 33-816 of the Connecticut General Statutes, the
   shareholders of CNG will adopt an Agreement and Plan of Exchange with CTG. 
   Under the statute, the adoption of the plan will cause the shares of CNG to
   be deemed to be shares of CTG; accordingly, new certificates will not be
   issued to current CNG shareholders.  CNG common shareholders will own all
   the issued and outstanding shares of CTG under the Connecticut General
   Statutes.  The CNG 8% preferred stock and 6% preferred stock will remain
   outstanding after the Exchange and will not be exchanged for CTG stock.  The
   shares of CTG held by CNG prior to the Exchange will be canceled. 

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   Holders of CNG common stock will have appraisal rights and therefore may
   choose to receive cash instead of CTG stock if they properly perfect their
   rights as dissenters.  Holders of CNG 8% preferred stock also will have
   appraisal rights and therefor may choose to receive cash for their shares if
   they properly perfect their rights as dissenters.  Any shareholder who
   dissents must dissent as to all CNG shares beneficially owned by such share-
   holder.  Under Connecticut law, CNG must pay to a dissenter an amount equal
   to the estimated fair value of the dissenter's CNG shares, plus accrued
   interest. 
    
   Following the Exchange, CNG intends to undertake a corporate restructuring. 
   CNG plans to distribute all of the stock of TEN to CTG.  The corporate
   restructuring will result in a holding company structure whereby CTG will
   own all of the common stock of CNG, a regulated subsidiary, and all of the
   stock of TEN, a non-regulated subsidiary. 
    
   The Exchange and related corporate restructuring is being undertaken for a
   real and substantial business purpose.  This business purpose is discussed
   more fully in the Proxy Statement for CNG, Prospectus for CTG included with
   Amendment No. 1 to Form S-4, filed with the Securities and Exchange
   Commission on December 27,1996 (Proxy/ Prospectus), at "Item 2. The
   Exchange; Reasons for the Exchange and Corporate Restructuring." To
   summarize, the purpose of the Proposed Exchange and the related corporate
   restructuring transactions described below is to facilitate a plan designed
   to separate the ownership of activities subject to regulation by the DPUC
   from those that are not subject to its review.  Management believes this
   separation will permit greater flexibility to develop and operate businesses
   in an increasingly competitive environment, offer a mechanism for better
   defining and separating the regulated and non-regulated businesses and for
   protecting the regulated business and its customers from the risks involved
   in non-regulated ventures, and facilitate more efficient access to capital
   markets in the future for both the regulated and non-regulated businesses. 
    
   IV.  CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE EXCHANGE 
    
   Our opinions expressed below are addressed only to those federal income tax
   aspects relating to the Exchange that in our judgment are material to CNG
   and its shareholders.  The opinions set forth below do not address the tax
   consequences of the Exchange to a CNG shareholder that has a special status,
   including insurance companies; tax-exempt entities; financial institutions
   or broker-dealers; foreign corporations, estates and trusts not subject to
   U.S. federal income tax on their income regardless of source, and persons
   who are not citizens or residents of the United States; and persons who
   acquired stock as a result of the exercise of an employee stock option,
   pursuant to an employee stock purchase plan, or otherwise as compensation. 
    
   Based on the facts, assumptions and representations set forth or referred to
   above, it is our opinion that: 
    

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       1)  The Exchange should be treated as an exchange of shares of CNG
           common stock for shares of CTG common stock to which Section 351
           applies. 
    
       2)  No gain or loss should be recognized by a CNG shareholder that
           receives solely shares of CTG common stock in exchange for shares of
           CNG common stock pursuant to the Exchange. [Section 351(a)]. 
    
       3)  The tax basis of the shares of CTG common stock received pursuant to
           the Exchange by a CNG shareholder should be the same as the tax
           basis of the shares of CNG common stock exchanged therefor.
           [358(a)(1)]. 
    
       4)  The holding period of the shares of CTG common stock received
           pursuant to the Exchange by a CNG shareholder should include the
           period during which the shares of CNG common stock exchanged
           therefor were held by such shareholder, provided that such shares
           were held as capital assets. [Section 1223(1)]. 
    
       5)  No income, gain or loss should be recognized by CTG on the issuance
           of its shares of common stock in exchange for shares of CNG common
           stock pursuant to the Exchange. [Section 10321]. 
    
       6)  Gain or loss should be recognized by a CNG shareholder who properly
           perfects such shareholder's appraisal rights under Connecticut law,
           measured by the difference between the amount of cash received
           (other than any amount constituting interest, which should be
           ordinary income to such shareholders) and the basis of the shares of
           CNG stock exchanged therefor. [Section 1001].  Such gain or loss
           should be capital gain or loss provided that the shares of CNG stock
           were held as capital assets at the time of the Exchange, and should
           be long term capital gain or loss if such shares were held for more
           than one year at such time. [Section 1222].  Under certain circum-
           stances, a dissenting CNG shareholder may be considered to own
           shares of CNG stock owned by related parties. [Section 318].  As a
           result, a dissenting CNG shareholder may recognize dividend income
           equal to the amount of cash received (other than any amount
           constituting interest, which should be ordinary income to such
           dissenting shareholder) pursuant to the appraisal rights, instead of
           recognizing capital gain or loss. [Section 301].  Accordingly,
           dissenting CNG shareholders are urged to consult their tax advisors
           in connection with the Exchange. 
    
   This opinion is solely for your benefit and is not intended to be relied
   upon by anyone other than you.  Except to the extent expressly permitted
   hereby, and without the prior written consent of this firm, this letter may
   not be quoted in whole or in part or otherwise referred to in any documents
   or delivered to any other person or entity. (Any such authorized other party
   receiving a copy of this letter must consult and rely upon the advice of
   his/her/its own counsel, accountant, or other adviser). 

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   We hereby consent to the filing of this opinion as an exhibit to the S-4
   Registration/Proxy Statement filed with the Securities and Exchange
   Commission under the Securities Act of 1933 and to the reference to us in
   the Proxy/Prospectus. 
    
   Very truly yours, 
    
   ARTHUR ANDERSEN LLP 
    









































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