PEOPLES GAS SYSTEM
GAS OPERATING STATISTICS (Unaudited)

                       
  Operating Revenues*           Therms*        
Three Months Ended March 31,         Percent           Percent
  2002   2001   Change   2002   2001   Change
                       
By Customer Segment:                      
Residential $ 25,819   $ 41,800   (38.2)   25,265   27,483   (8.1)
Commercial 35,701   67,480   (47.1)   95,925   90,810   5.6
Industrial 3,354   3,938   (14.8)   67,389   62,019   8.7
Off System Sales 10,391   4,389   --   33,358   6,619   --
Power generation 2,873   2,885   (0.4)   116,173   78,028   48.9
Other revenues 7,316   13,644   (46.4)   -   -   --

  $ 85,454   $ 134,136   (36.3)   338,110   264,959   27.6

                       
By Sales Type:                      
System supply $ 57,850   $ 105,044   (44.9)   91,645   82,026   11.7
Transportation 20,288   15,448   31.3   246,465   182,933   34.7
Other revenues 7,316   13,644   (46.4)   --   --   --

  $ 85,454   $ 134,136   (36.3)   338,110   264,959   27.6

                       
Average customers 275,975   266,278   3.6   --   --   --

                       
                       
                       

  Operating Revenues*           Therms*        
Twelve Months Ended March 31,         Percent           Percent
  2001   2000   Change   2001   2000   Change
                       
By Customer Segment:                      
Residential $ 72,241   $ 89,612   (19.4)   56,625   61,228   (7.5)
Commercial 131,806   174,965   (24.7)   314,031   298,550   5.2
Industrial 11,903   13,324   (10.7)   246,189   260,329   (5.4)
Off System Sales 44,220   33,960   30.2   132,282   72,160   83.3
Power generation 11,289   11,080   1.9   441,685   394,177   12.1
Other revenues 32,742   39,037   (16.1)   --       --

  $ 304,201   $ 361,978   (16.0)   1,190,812   1,086,444   9.6

                       
By Sales Type:                      
System supply $ 203,772   $ 271,754   (25.0)   301,800   298,731   1.0
Transportation 67,687   51,187   32.2   889,012   787,713   12.9
Other revenues 32,742   39,037   (16.1)   --   --   --

  $ 304,201   $ 361,978   (16.0)   1,190,812   1,086,444   9.6

                       
Average customers 269,016   258,889   3.9   --   --   --

                       
* in thousands