UNITED STATES
SECURITIES AND EXCHANGE COMMISSION 
WASHINGTON, D.C. 20549

Form 10-Q



|[X]                                                    |    | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2003. 
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|                                                       | 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 1-935                          
|                                                      
|QUESTAR GAS COMPANY                                   
|                                                      
|(Exact name of registrant as specified in its charter)





|State of Utah(State or other jurisdiction of
incorporation or organization)                    |  | 87-0155877(IRS Employer Identification Number)
|---------------------------------------------------------------------------------------------- |  | ----------------------------------------------
|                                                                                               |  |                                               
|P.O. Box 45360
180 East 100 South
Salt Lake City, Utah(Address of principal executive offices) |  | 84145-0360(Zip code)                          

(801) 324-5555(Registrant's telephone number, including area code)



|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.
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|                                                                                                                                                                                                                                                                                                                                                        
|Yes   [X]                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                        
|Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act.)                                                                                                                                                                                                                                   
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|Yes   [  ]                                                                                                                                                                                                                                                                                                                                              
|                                                                                                                                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                                                                                                                                        
|Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.                                                                                                                                                                                                                           
|                                                                                                                                                                                                                                                                                                                                                        
|Class                                                                                                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                                                                                                        
|Common Stock, $2.50 par value                                                                                                                                                                                                                                                                                                                           
|                                                                                                                                                                                                                                                                                                                                                        
|Registrant meets the conditions set forth in General Instruction H(a)(1) and (b) of Form 10-Q and is filing this Form 10-Q with the reduced disclosure format.                                                                                                                                                                                          





|Questar Gas Company                                        
|-----------------------------------------------------------
|Form 10-Q for the Quarterly Period Ended September 30, 2003
|                                                           
|TABLE OF CONTENTS                                          



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|PART I   | FINANCIAL INFORMATION                         |   
|-------- | --------------------------------------------- | --
|         |                                               |   
|Item 1.  | Financial Statements                          |   
|         |                                               |   
|         | Income Statements                             | 3 
|         |                                               |   
|         | Condensed Balance Sheets                      | 4 
|         |                                               |   
|         | Condensed Statements of Cash Flows            | 5 
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|         | Notes Accompanying Financial Statements       | 6 
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|Item 2.  | Management's Discussion and Analysis of       | 8 
|         | Financial Condition and Results of Operations |   
|         |                                               |   
|Item 4.  | Controls and Procedures                       | 12
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|PART II. | OTHER INFORMATION                             |   
|         |                                               |   
|Item 1.  | Legal Proceedings                             | 13
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|Item 6.  | Exhibits and Reports on Form 8-K              | 14
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|         | Signatures                                    | 14
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|2       



|PART I  FINANCIAL INFORMATION           
|----------------------------------------
|Item 1.  Financial Statements           
|                                        
|QUESTAR GAS COMPANY                     
|STATEMENTS OF INCOME                    
|(Unaudited)                             
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|REVENUES                                
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|OPERATING EXPENSES                      
|Cost of natural gas sold                
|Operating and maintenance               
|Rate-refund obligation                  
|Depreciation and amortization           
|Other taxes                             
|                                        
|                                        
|TOTAL OPERATING EXPENSES                
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|OPERATING INCOME (LOSS)                 
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|INTEREST AND OTHER INCOME               
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|DEBT EXPENSE                            
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|INCOME (LOSS) BEFORE INCOME             
|TAXES AND CUMULATIVE EFFECT             
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|INCOME TAXES                            
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|INCOME (LOSS) BEFORE                    
|CUMULATIVE EFFECT                       
|                                        
|Cumulative effect of accounting change  
|for asset retirement obligations, net of
|income taxes of $204                    
|                                        
|NET INCOME (LOSS)                       
|                                        
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|                                        
|See notes to the financial statements   
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|3                                       



|QUESTAR GAS COMPANY     
|------------------------
|CONDENSED BALANCE SHEETS
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|4                       



|QUESTAR GAS COMPANY              
|---------------------------------
|CONDENSED STATEMENTS OF CASH FLOW
|(Unaudited)                      
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|5                                



|QUESTAR GAS COMPANY                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|NOTES TO FINANCIAL STATEMENTS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|September 30, 2003                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|(Unaudited)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Note 1 - Basis of Presentation of Interim Financial Statements                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|The accompanying financial statements of Questar Gas Company (Questar Gas or the Company), with the exception of the condensed balance sheet as of December 31, 2002, have not been audited by independent public accountants.  The interim financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair presentation of the results for the interim periods presented.  All such adjustments are of a normal recurring nature.  Due to the seasonal nature of the business, the results of operations for the three-, nine- and twelve-month periods ended September 30, 2003, are not necessarily indicative of the results that may be expected for the year ending December 31, 2003. The impact of abnormal weather on gas distribution earnings is significantly reduced by the operations of a weather-normalization adjustment. For further information refer to the financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2002 filed by Questar Gas.
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Note 2 - Utah Supreme Court Order in Questar Gas Carbon Dioxide Case                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|On August 1, 2003, the Utah Supreme Court issued an order reversing a decision made by the Public Service Commission of Utah (PSCU) in August of 2000 concerning certain processing costs incurred by Questar Gas.  The court ruled that the PSCU did not comply with its responsibilities and regulatory procedures when approving a stipulation in Questar Gas's general rate case filed in December of 1999.  The stipulation permitted Questar Gas to collect $5 million per year in rates to recover a portion of the costs incurred to reduce the level of carbon dioxide in gas volumes delivered to customers.  The Committee of Consumer Services (Committee), a Utah state agency, appealed the PSCU's decision because the PSCU did not explicitly address whether the costs were prudently incurred.                                                                                                                                                                                                                                                       
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|As a result of the Court's order, Questar Gas recorded a $22 million liability for a potential refund to gas distribution customers.  The liability reflects revenue received for processing costs from June of 1999 through June of 2003.  This charge reduced Questar Gas net income by $13.6 million.  For safety reasons, the Company has decided to continue to operate the plant.  The cost for the second half of 2003 will be approximately $1.6 million, before interest.  Thereafter, annual costs will be approximately $3.2 million after tax, before interest.  Recording the liability did not have a material impact on credit, cash or liquidity of Questar Gas.  Questar Gas has requested ongoing rate coverage for CO2 costs in its recent gas cost pass-through.  Until the issue is decided by the PSCU, Questar Gas will record a liability for potential refund of the ongoing CO2 processing costs being collected in rates.                                                                                                                   
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Questar Gas believes that it acted prudently and in the best interests of its customers to incur the processing costs and that the PSCU should now decide the issues.  It has requested the PSCU proceed with the original case and find Questar Gas's actions were prudent.  The Committee is arguing that the PSCU is precluded from proceeding with the case and has requested the PSCU immediately order refunds.  Questar Gas and the Committee filed briefs on September 25, responsive briefs on October 23 and reply briefs on November 5.  The PSCU has not issued any further decisions and timing for resolution of the CO2 case is uncertain since any PSCU order may be subject to appeals.                                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Note 3 - Cumulative Effect of Accounting Change -"Accounting for Asset Retirement Obligations"                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|On January 1, 2003, Questar Gas adopted Statement of Financial Accounting Standards 143 (SFAS 143) "Accounting for Asset Retirement Obligations."  As a result, the Company recorded a $334,000 after tax charge for the cumulative effect of this accounting change and a $582,000 long-term asset retirement obligation.  SFAS 143 addresses the                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
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|6                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|financial accounting and reporting of the fair value of legal obligations associated with the retirement of tangible long-lived assets.  The new standard requires the Company to estimate a fair value of abandonment costs and to capitalize and depreciate those costs over the life of the related assets. The provisions of SFAS 143 did not apply
to a majority of the Company's long-lived distribution-system assets due to lack of a legal obligation to abandon the assets or to an indeterminable abandonment date.  The new accounting rules allow deferral of an obligation until the abandonment date is known.                                                                                                                                                                                                                                                                                                                                                                                                                                          
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|Questar Gas recorded a regulatory asset amounting to $6.6 million, reflecting a retroactive charge for the abandonment costs associated with gas wells operated on its behalf by Wexpro.  The regulatory asset will be reduced as gas wells are plugged and abandoned.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
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|The asset retirement obligation is adjusted to its present value each period through an accretion process using a credit-adjusted risk-free interest rate.    Both the accretion expense associated with the liability and the depreciation associated with the capitalized abandonment costs are non-cash expenses until the asset is retired.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|Note 4 - Financing                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
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|On January 24, 2003, Questar Gas issued $40 million of ten year notes with an effective interest rate of 5.02%.  The proceeds were used to redeem $41 million of debt with a coupon rate of 8.4%.  Questar Gas paid a $1.7 million call premium.  This issue completed a Form S-3 shelf registration for issuance of up to $100 million of medium-term notes filed by Questar Gas in the third quarter of 2001.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|On February 27, 2003, Questar Gas filed a shelf registration statement for the issuance of up to $70 million of medium-term notes.  In March 2003, Questar Gas sold $70 million of 15-year notes with a coupon rate of 5.31%.  On April 24, 2003, proceeds from the offering were used to redeem $64 million of higher-cost debt issued in 1992 and 1993 with a weighted-average interest rate of 8.11%.  Questar Gas paid a call premium of $2.6 million.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
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|Note 5 - Reclassifications                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
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|Certain reclassifications were made to the 2002 financial statements to conform with the 2003 presentation.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|7                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      



|Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations
|----------------------------------------------------------------------------------------------
|QUESTAR GAS COMPANY                                                                           
|September 30, 2003                                                                            
|(Unaudited)                                                                                   
|                                                                                              
|Operating Results                                                                             
|                                                                                              
|Following is a summary of financial and operating information for the Company:                
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|FINANCIAL RESULTS - (In Thousands)                                                            
|Revenues                                                                                      
|From unaffiliated customers                                                                   
|From affiliates                                                                               
|                                                                                              
|Total revenues                                                                                
|Cost of natural gas sold                                                                      
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|Margin                                                                                        
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|Operating income (loss)                                                                       
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|Income (loss) before cumulative effect                                                        
|Cumulative effect of accounting change                                                        
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|Net income (loss)                                                                             
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|OPERATING STATISTICS                                                                          
|Natural gas volumes (In                                                                       
|Thousands of Decatherms)                                                                      
|Residential and commercial sales                                                              
|Industrial sales                                                                              
|Transportation for industrial customers                                                       
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|Total industrial                                                                              
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|Total deliveries                                                                              
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|Natural gas revenue (per Decatherm)                                                           
|Residential and commercial                                                                    
|Industrial sales                                                                              
|Transportation for industrial customers                                                       
|Heating degree days colder (warmer)                                                           
|than normal                                                                                   
|Average temperature adjusted usage                                                            
|per customer (Decatherms)                                                                     
|Number of customers at September 30,                                                          
|Residential and commercial                                                                    
|Industrial                                                                                    
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|Total                                                                                         
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|8                                                                                             



|Third Quarter Earnings                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
|Questar Gas's seasonal third quarter loss increased from $4.7 million in 2002 to $8.3 million in 2003.  The 2002 quarter benefited from a $2.3 million after-tax settlement related to gas processing costs.  However, this amount was later part of a potential liability charge in the second quarter of 2003.  In addition, Questar Gas accrued an additional $900,000 after tax charge in the third quarter for gas processing costs.  Questar Gas's rate structure is more seasonal as a result of a December 2002 general rate case as explained below.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Revenues less cost of natural gas sold (margin)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Questar Gas's margin for the 2003 periods benefited from a general rate increase effective December 30, 2002.  The Public Service Commission of Utah (PSCU) issued an order approving an annual increase of $11.2 million using an 11.2% return on equity and end-of-test-period usage per customer and costs.  The PSCU had based previous rate increases on a historical test year.  Also, the PSCU's general rate order changed the regulatory accounting treatment of contributions in aid of construction (CIAC).  Prior to 2003, CIAC had been treated as revenue.  With the new order, CIAC will reduce rate base.  The change shifted revenues to the first and fourth quarters.                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Questar Gas's margin was 16% lower in the third quarter of 2003 when compared with the third quarter of 2002 primarily due to a one-time recovery of gas costs and CIAC collected in 2002.  The 2002 quarter benefited from an August 2002 one-time recovery of $3.8 million of gas costs, which had been previously denied.  The PSCU's order allowing the recovery was later reversed by a Utah Supreme Court ruling dated August 1, 2003.  CIAC amounted to $1.5 million in the third quarter of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Higher general rates, more customers and higher usage per customer resulted in an increase in Questar Gas's margin for the first nine months of 2003.  These factors more than offset the effect of the 2002 $3.8 million recovery of gas costs, CIAC received in 2002 and elimination of a new premise fee in the general rate case.  The number of customers increased 20,276 or 2.8% in the year to year comparison.  Temperature adjusted usage per customer grew by 2% in the first nine months of 2003 compared with the same period in 2002.  The weather-normalization adjustment (WNA) mitigates the financial effect of temperatures that are either colder or warmer than normal.  Generally, under the WNA customers pay for the non-gas costs reflected in rates based on normal temperatures.                                                                                                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|The margin for the 12-months ended September 30, 2003, was higher when compared with the corresponding period of 2002 due to several factors in addition to those discussed above.  Beginning in 2002 the PSCU authorized Questar Gas to recover the gas cost portion of bad debt expense in pass through gas costs.  Also, gas volumes delivered to industrial customers were lower in the 2003 periods presented due to decreased gas usage for generation of electricity and in manufacturing processes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|Expenses                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Operating and maintenance expenses were higher in the 2003 periods presented when compared to the same periods in 2002 due primarily to higher labor-related costs.   Labor-related expenses have increased primarily because of higher costs of pension and benefit programs and less construction-related capitalization of labor costs. Higher depreciation expense in the first nine months of 2003 reflects increased investment in computer equipment and software, which are depreciated over a shorter life than service lines and meters.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
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|Debt expense was lower in the 2003 periods presented when compared with the 2002 periods as a result of refinancing long-term debt and a lower purchased-gas account.  Questar Gas incurs a carrying charge on the purchased-gas account obligation and earns a carrying fee when the balance is an asset.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|Rate Refund Obligation                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|The Utah Supreme Court issued an order reversing decisions made by the PSCU in August of 2000 and August of 2002.  The PSCU originally permitted Questar Gas to collect $5 million per year to recover costs incurred to process                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
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|9                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|certain gas volumes delivered to customers.  In August 2002, the PSCU allowed an additional $3.8 million of recovery from a previous period.  As a result of the order, Questar Gas recorded a $22 million liability in the second quarter of 2003.  The liability reflects a potential refund of gas processing costs collected in rates from June of 1999 through June of 2003.  In the third quarter of 2003, Questar Gas increased the liability by a $1.5 million charge including interest.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
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|The effective income tax rate was 58.0% for the first nine months of 2003 and was the result of a regulatory adjustment to amortize $921,000 per year of deferred taxes.  The effective income tax rate for the first nine months was 35.4% in 2002.  An income tax credit for non-conventional fuel credits expired for gas produced after December 31, 2002.  However, the expired tax credit was considered in setting rates in Questar Gas's general rate increase effective December 31, 2002.  The Company realized $1.3 million of non-conventional fuel tax credits in the first nine months of 2002.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
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|Cumulative effect of change in accounting method                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|On January 1, 2003, the Company adopted a new accounting rule, SFAS 143, "Accounting for Asset Retirement Obligations" and recorded a cumulative effect that reduced net income by $334,000.  Another $6.6 million, before income taxes, was recorded as a regulatory asset representing the accumulated SFAS 143 costs incurred by Wexpro for gas wells operated on behalf of Questar Gas.  This asset will be amortized as the wells are plugged and abandoned.  The ongoing accretion and depreciation expenses associated with SFAS 143 that will directly affect income are insignificant.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Liquidity and Capital Resources                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Operating Activities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Net cash provided from operating activities in the first nine months of 2003 was $53.7 million less than was provided during the same period of 2002, primarily due to changes in operating assets and liabilities.  The purchased-gas adjustment changed to an undercollected position in 2003.  In addition, a mild winter and higher gas prices in 2003 resulted in more gas volumes in storage at a higher average cost.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|Investing Activities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Capital expenditures were $46.2 million for the first nine months of 2003 and are estimated to reach $82.3 million for calendar year 2003.  Questar Gas's forecasted capital investment in 2003 includes approximately $17.2 million to replace an aging customer information system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|Financing Activities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Net cash provided from operating activities in the first nine months of 2003 allowed the Company to finance capital expenditures and pay dividends.  Capital expenditures for the remainder of 2003 are expected to be financed from net cash flow provided from operating activities.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
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|Questar Gas issued $110 million of medium-term notes in 2003 and used the proceeds to replace $105 million of existing medium-term notes that carried higher coupon rates.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|OTHER INFORMATION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
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|Federal Energy Regulatory Commission (FERC) - Notice of Proposed Rulemaking (NOPR) on Affiliated Relations                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|The FERC has proposed rules requiring pipelines to comply with certain "nondiscriminatory" standards when dealing with affiliated energy companies including state regulated local distribution companies.  At the current time, local distribution companies (LDCs) such as Questar Gas that do not engage in unregulated gas sales are exempt from the FERC's marketing affiliate regulations.  Questar Regulated Services believes that the current exemption should be continued, but the FERC has not yet made a decision on whether affiliate rules should be expanded to include gas                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|10                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|LDCs such as Questar Gas.  A FERC decision to extend energy affiliate rules to include LDCs could have adverse consequences for Questar Gas.  Questar Pipeline and Questar Gas realize significant cost savings by sharing the cost of administrative, engineering, gas control, technical, accounting, legal and regulatory services.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
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|Purchased-Gas Cost Filings                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Effective July 1, 2003, the PSCU approved a $146.4 million pass-on increase in annual gas costs for Utah customers.  Subsequently, gas prices have fallen.  Effective October 1, 2003, the PSCU approved a $43.4 million pass-on decrease in annual gas cost.  The Public Service Commission of Wyoming (PSCW) granted Questar Gas permission to pass on a $6.8 million increase in gas costs to Wyoming customers also effective July 1, 2003.  Also, the PSCW approved a 1.7 million pass-on decrease effective October 1, 2003 due to falling gas costs.  Pass-on rate increases or decreases result in equal adjustments of revenues and gas costs without affecting the earnings of Questar Gas.                                                                                                                                                                                                                                                                                                                                                                                                                              
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|FORWARD LOOKING STATEMENTS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|This report includes "forward-looking statements" within the meaning of Section 27(A) of the Securities Act of 1933, as amended, and Section 21(E) of the Securities Exchange Act of 1934, as amended.  All statements other than statements of historical facts included or incorporated by reference in this report, including, without limitation, statements regarding the Company's future financial position, business strategy, budgets, projected costs and plans and objectives of management for future operations, are forward-looking statements.  In addition, forward-looking statements generally can be identified by the use of forward-looking terminology such as "may," "will," "could," "expect," "intend," "project," "estimate," "anticipate," "believe," "forecast," or "continue" or the negative thereof or variations thereon or similar terminology.  Although these statements are made in good faith and are reasonable representations of the Company's expected performance at the time, actual results may vary from management's stated expectations and projections due to a variety of factors.
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|Important assumptions and other significant factors that could cause actual results to differ materially from those expressed or implied in forward-looking statements include:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Changes in general economic conditions;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|Changes in prices and supplies;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Changes in rate-regulatory policies;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
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|Regulation of the Wexpro agreement;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
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|Rate of inflation and interest rates;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|Weather and other natural phenomena;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
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|The effect of environmental regulation;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|Changes in customers' credit ratings and their ability to pay for gas consumed;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Competition from other forms of energy;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|The effect of accounting policies issued periodically by accounting standard-setting bodies;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|Adverse repercussion from terrorist attacks or acts of war;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|Adverse changes in the business or financial condition of the Company; and                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|Lower credit ratings.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|11                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 



|Item 4.  Controls and Procedures                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
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|a. Evaluation of Disclosure Controls and Procedures.  The Company's Chief Executive Officer and Chief Financial Officer have evaluated the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Rules 13a-14(c) and 15d-14(c) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date").  Based on such evaluation, such officers have concluded that, as of the Evaluation Date, the Company's disclosure controls and procedures are effective in alerting them on a timely basis to material information relating to the Company, including its consolidated subsidiaries, required to be included in the Company's reports filed or submitted under the Exchange Act.
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|b.  Changes in Internal Controls.  Since the Evaluation Date, there have not been any significant changes in the Company's internal controls or in other factors that could significantly affect such controls.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
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|12                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Part II 
OTHER INFORMATION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                



|Item 1.   Legal Proceedings                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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|a.	   Questar Gas Company ("Questar Gas" or "the Company") has filed initial and responsive briefs with the Public Service Commission of Utah ("PSCU") to comply with a scheduling order set by the PSCU after receipt of a decision issued by the Supreme Court of Utah.  See the Company's Quarterly Report on Form 10-Q for the period ending June 30, 2003, Part II, Item 1.  Legal Proceedings, for a description of this decision in which the court found that the PSCU did not comply with regulatory procedures when approving a stipulation in Questar Gas's 1999 general rate case permitting the recovery of specified carbon dioxide processing costs.                                                                                                                                                                                                  
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|In its briefs, Questar Gas contends that the PSCU should proceed with deliberations in the 1999 general rate case to consider the prudence of incurring costs for the removal of carbon dioxide from gas volumes to enhance the heating value of such volumes.  This processing provides customers with a transitional period to have their appliances checked and adjusted, if necessary, to burn gas volumes with a lower heating value.  The Committee of Consumer Services, the Utah state agency that filed and won the appeal, argues that the PSCU should order Questar Gas to refund the costs it has collected in rates for such processing activities.  Two additional parties to the original stipulation have asked the PSCU to answer whether it made a prudent finding in the 1999 rate case, and, if not, to proceed with making such a determination.
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|Questar Gas filed a reply brief with the PSCU on November 5, 2003.  Oral arguments will be presented to the PSCU on December 11, 2003.  Pending the outcome of the regulatory proceedings and possible legal appeals, the Company is continuing to collect the processing costs as part of its gas costs, but has recorded a liability equal to the total amount of such costs recovered in rates plus interest.                                                                                                                                                                                                                                                                                                                                                                                                                                                     
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|b.   On September 4, 2003, the Company filed an "out of period" application with the PSCU, seeking approval to reduce its annualized gas costs by $43,402,000 for a new total of $440,507,693.  Questar Gas, in its application, noted that purchased gas costs were decreasing since the Company's semi-annual, gas-cost application filed in May of 2003 and requested that the reduced rates be effective October 1, 2003.  The Company also requested that the PSCU authorize it to continue collecting carbon dioxide processing costs in gas costs.  The requested rate schedule would result in an annual bill of $815.93 for a typical residential customer using 115 decatherms per year, compared to an annual bill of $695.86 using January 2003 rates.                                                                                                   
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|Questar Gas, the Division of Public Utilities, and the Committee of Consumer Services agreed to a stipulation that the entry of an interim order by the PSCU would not be deemed a decision to allow or deny recovery of carbon dioxide processing costs.  By interim order dated September 30, 2003, the PSCU authorized the Company to reflect the decrease in its rates effective October 1, 2003.                                                                                                                                                                                                                                                                                                                                                                                                                                                                
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|c.   Questar Gas filed a companion gas-cost application with the Public Service Commission of Wyoming ("PSCW") on August 28, 2003.  In this application, the Company requested authorization to reduce annualized gas costs by $1,697,000, for a new total of $17,918,365.  The PSCW, by notice and order dated September 17, 2003, authorized Questar Gas to charge the new rates effective October 1, 2003.                                                                                                                                                                                                                                                                                                                                                                                                                                                        



|Item 6.   Exhibits and Reports on Form 8-K.                  
|-------------------------------------------------------------
|                                                             
|a.   The following exhibits are filed as part of this report:





|Exhibit No.                                                                                                                                                                                                  | Exhibit                                                                                                                                        
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | -----------------------------------------------------------------------------------------------------------------------------------------------
|                                                                                                                                                                                                             |                                                                                                                                                
|31.1                                                                                                                                                                                                         | Certification signed by A. K. Allred, Questar Gas Company's Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
|                                                                                                                                                                                                             |                                                                                                                                                
|31.2                                                                                                                                                                                                         | Certification signed by S. E. Parks, Questar Gas Company's Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 
|                                                                                                                                                                                                            
|b.   During the quarter, Questar Gas filed a Current Report on Form 8-K dated August 1, 2003, disclosing the adverse decision rendered by the Supreme Court of Utah in the Company's 1999 general rate case.
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|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.
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                  |  | QUESTAR GAS COMPANY
   (Registrant)                               
|----------------- |  | ------------------------------------------------------------------
|November 12, 2003 |  | /s/ A. K. Allred                                                  
|                  |  |                                                                   
|Date              |  | A. K. Allred
President and Chief Executive Officer                
|                  |  |                                                                   
|                  |  |                                                                   
|November 12, 2003 |  | /s/S. E. Parks                                                    
|                  |  |                                                                   
|Date              |  | S. E. Parks
Vice President, Treasurer, and Chief Financial Officer
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|Exhibit List
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|Exhibit No. 31.1
|----------------
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|CERTIFICATION   





|I, Alan K. Allred, certify that:
|--------------------------------





|1. | I have reviewed this quarterly report on Form 10-Q of Questar Gas Company;
|-- | --------------------------------------------------------------------------





|2. | Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|3. | Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|4. | The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | a) | designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | b) | evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | c) | presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------





|5. | The registrant's other certifying officer and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function):
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | a) | all significant deficiencies in the design or operation of internal controls that could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|   | b) | any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls;
|-- | -- | --------------------------------------------------------------------------------------------------------------------------------------------------
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|16





|6. | The registrant's other certifying officer and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|                  |  |                                                   
|----------------- |  | --------------------------------------------------
|November 12, 2003 |  | By:  /s/A. K. Allred                              
|                  |  |                                                   
|Date              |  | A. K. Allred
President and Chief Executive Officer
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|Exhibit No. 31.2
|----------------
|                
|CERTIFICATION   





|I, S. E. Parks, certify that:
|-----------------------------





|1. | I have reviewed this quarterly report on Form 10-Q of Questar Gas Company;
|-- | --------------------------------------------------------------------------





|2. | Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|3. | Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|4. | The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | a) | designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | b) | evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | c) | presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------





|5. | The registrant's other certifying officer and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function):
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | a) | all significant deficiencies in the design or operation of internal controls that could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|   | b) | any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls;
|-- | -- | --------------------------------------------------------------------------------------------------------------------------------------------------
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|18





|6. | The registrant's other certifying officer and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|                  |  |                                                                   
|----------------- |  | ------------------------------------------------------------------
|November 12, 2003 |  | By:  /s/S. E. Parks                                               
|                  |  |                                                                   
|Date              |  | S. E. Parks
Vice President, Treasurer, and Chief Financial Officer
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