| Naics index | Naics index description |
|---|---|
| 221210 | Distribution of manufactured gas |
| 221210 | Distribution of natural gas |
| 221210 | Distribution of renewable natural gas (RNG) |
| 221210 | Gas, manufactured, distribution |
| 221210 | Gas, mixed natural and manufactured, distribution |
| 221210 | Gas, natural, distribution |
| 221210 | Liquefied petroleum gas (LPG) distribution through mains |
| 221210 | Manufactured gas distribution |
| 221210 | Natural gas brokers |
| 221210 | Natural gas distribution systems |