| Company | Booth | |
| HalenHardy | 101 | |
| HARBO Technologies | 251 | |
| Haz-Mat Response/Haz-Mat One | 210 | |
| HipLink Software | 528 | |
| Horizon Environmental | 419 | |
| Hull's Environmental Services, Inc. | 408 | |
Alabama Department of Environmental Management
Florida Department of Environmental Protection
Mississippi Department of Environmental Quality