Active Natural Gas Utility Service Areas |
| Canada |
Kentucky |
| Alberta |
Columbia Gas of Kentucky |
| AltaGas Utility |
Maryland |
| Direct Energy Regulated Services North |
Baltimore Gas & Electric |
| Direct Energy Regulated Services South |
Columbia Gas of Maryland |
| British Columbia |
Washington Gas Light - MD |
| Terasen Gas-East Kootenays |
Michigan |
| Terasen Gas-Inland |
Consumers Energy Michigan |
| Terasen Gas-Lower Mainland/Squamish |
Michigan Consolidated Gas |
| Manitoba |
New Jersey |
| Centra Gas Manitoba |
NJ Natural Gas |
| Ontario |
NUI Elizabethtown Gas |
| Enbridge Gas Distribution Inc. |
PSE&G New Jersey |
| Kingston Utilities - Natural Gas |
South Jersey Gas |
| Kitchener Utilities |
Ohio |
| Union Gas - Northern\Eastern Ont. |
Columbia Gas of Ohio |
| Union Gas Southern Ontario |
Dominion East Ohio Gas |
| United States |
Duke Energy (Cincinnati Gas and Electric) |
| Georgia |
Vectren Energy Delivery |
| Atlanta Gas Light |
Pennsylvania |
| Illinois |
Columbia Gas of PA |
| Nicor Gas |
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