| Florida | TECO Peoples Gas | Docket No. 080318-GU |
| Georgia | Alanta Gas |
Docket No. 8390-U |
| Illinois | Nicor Gas | Docket No. 08-0363 |
| Missouri | Atmos Laclede Gas Missouri Gas Energy Empire District Gas | Case No. GR-2006-0387 Case No. GR-2002-356 Case No. GR-2006-0422 Case No. GR-2009-0434 |
| Nebraska | SourceGas Distribution | Docket No. NG-0060 |
| North Dakota | Xcel Energy | Case No. PU-04-578, PU-08-171 |
| Ohio | Columbia Gas Dominion East Ohio Gas Duke Energy Vectren Ohio | Case No. 08-0072-GA-AIR Case No. 07-0829-GA-AIR Case No. 07-589-GA-AIR Case No. 07-1080-GA-AIR |
| Oklahoma | Oklahoma Natural Gas | Case No. PUD200400610 |
| Texas | Texas Gas Service El Paso | City of El Paso, Texas, Ordinance (Resolution), Dated January 15, 2008 |