| Naics index | Naics index description |
|---|---|
| 237110 | Irrigation project construction (except lawn) |
| 237110 | Lagoon, sewage treatment construction |
| 237110 | Pumping station, water and sewage system, construction |
| 237110 | Reservoir construction |
| 237110 | Sanitary sewer construction |
| 237110 | Sewage collection and disposal line construction |
| 237110 | Sewage disposal plant construction |
| 237110 | Sewage treatment plant construction |
| 237110 | Sewer construction |
| 237110 | Sewer main, pipe and connection, construction |