| Company | Location | Certifications | License # |
|---|---|---|---|
| Andrea Potter | — | Installer | — |
| Arnold Colquitt | — | Installer | — |
| Brandon Hodges | — | Installer | — |
| Brantley Campbell | — | Installer | — |
| Charles Pendley | — | Installer | — |
| Chris Meeks | — | Installer | — |
| Christopher Blankenship | — | Installer | — |
| Christopher Layfield | — | InstallerPumper | — |
| Daniel Patterson | — | Installer | — |
| David Batson | — | Installer | — |
| Donald Wells | — | Installer | — |
| Dylan Green | — | Installer | — |
| Gene Ferguson | — | Installer | — |
| Jacob Posey | — | Installer | — |
| James Grier | — | Installer | — |
| Jeremy Deason | — | InstallerPumper | — |
| Jerry Bice Jr | — | Installer | — |
| Justin Alexander | — | InstallerPumper | — |
| Lonnie Newton | — | Installer | — |
| Mark Andrews | — | Installer | — |
| Oliver Peterson | — | Installer | — |
| Robert Mulvehill | — | Installer | — |
| Shawn Newman | — | InstallerPumper | — |
| Thomas Graves | — | InstallerPumper | — |
| Thomas Hereford | — | Installer | — |
| Tony Gowins | — | InstallerPumper | — |
| Victor Turner | — | Installer | — |
| William Owen | — | Installer | — |
28 companies in the Alabama Onsite Wastewater Board licensee roster are based in St. Clair County as of 2026-07-23. Companies based elsewhere in Alabama also commonly serve the county.
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