| Company | Location | Certifications | License # |
|---|---|---|---|
| Arthur Arseneau | — | InstallerPumper | — |
| Bradley Warden | — | Installer | — |
| Brandon Gibbs | — | Installer | — |
| Brandon Marberry | — | Installer | — |
| Brennan Bell | — | Installer | — |
| Caine Hillis | — | Installer | — |
| Charles Terrell Jr | — | Installer | — |
| Daniel Sisk | — | Installer | — |
| Danny Burgess | — | Installer | — |
| Darrell Bell | — | Installer | — |
| Darren Marberry | — | Installer | — |
| Dennis Dean | — | Installer | — |
| Dylan Ames | — | InstallerPumper | — |
| Fred Ikard | — | Installer | — |
| Gerald Jones | — | Installer | — |
| Gregory Mullins | — | Installer | — |
| Jacob Rubelsky | — | Installer | — |
| James Burrough | — | InstallerPumper | — |
| Jeffrey Moore | — | Pumper | — |
| Jerry Mullins | — | Installer | — |
| Jim Duncan | — | Installer | — |
| John Bowers Sr | — | InstallerPumper | — |
| John Capuzzo | — | Installer | — |
| John Godinez | — | Pumper | — |
| Johnny Carter | — | Installer | — |
| Jonathan Cobb | — | Installer | — |
| Joseph Anderson Jr. | — | Pumper | — |
| Joshua Henry | — | Installer | — |
| Joshua Houk | — | Pumper | — |
| Justin Watson | — | Installer | — |
| Kasey Becker | — | Pumper | — |
| Larry Manley | — | Installer | — |
| Michael Bias Jr. | — | InstallerPumper | — |
| Michael Oliver | — | Installer | — |
| Michael Watson | — | Installer | — |
| Mike Stephens | — | Installer | — |
| Paul Smith | — | InstallerPumper | — |
| Randy Brady | — | Installer | — |
| Randy Caudle | — | Installer | — |
| Robert Powers | — | Installer | — |
| Roy Tipton | — | Installer | — |
| Shaun Gonzales | — | InstallerPumper | — |
| Shawn Brady | — | Installer | — |
| Sid Nayman | — | Installer | — |
| Steve Poole | — | Installer | — |
| Steve Vinson | — | InstallerPumper | — |
| Steven Dempsey | — | Installer | — |
| Teleasha Pruitt | — | InstallerPumper | — |
| Timothy Heard | — | Installer | — |
| Tony Ikard | — | InstallerPumper | — |
| Tyler Heard | — | Installer | — |
| Warren Pearsall | — | Installer | — |
| Wesley Pruitt | — | Installer | — |
| Wesley Stephens | — | Installer | — |
| William Paseur | — | Installer | — |
| William Simmons | — | Installer | — |
| William Thomas | — | Installer | — |
57 companies in the Alabama Onsite Wastewater Board licensee roster are based in Madison County as of 2026-07-23. Companies based elsewhere in Alabama also commonly serve the county.
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