| Company | Location | Certifications | License # |
|---|---|---|---|
| Bill Adams | — | Installer | — |
| Brandon Hurst | — | Pumper | — |
| Douglas Dawkins | — | InstallerPumper | — |
| Duane Shelley | — | Installer | — |
| Gregg Jones | — | Installer | — |
| Jason Strickland | — | InstallerPumper | — |
| John Lucas | — | Installer | — |
| Justin Woodham | — | InstallerPumper | — |
| Keith Langley | — | Installer | — |
| Kent Adams | — | Pumper | — |
| Mark Donaldson | — | Installer | — |
| Mark Snellgrove | — | InstallerPumper | — |
| Robert Land | — | InstallerPumper | — |
| Ronnie Roland | — | InstallerPumper | — |
| Scott Ellenburg | — | InstallerPumper | — |
| Titus Ross | — | InstallerPumper | — |
16 companies in the Alabama Onsite Wastewater Board licensee roster are based in Houston County as of 2026-07-23. Companies based elsewhere in Alabama also commonly serve the county.
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