| Company | Location | Certifications | License # |
|---|---|---|---|
| Alton Hicks | — | InstallerPumper | — |
| Benito Lopez | — | Installer | — |
| Bruce Massey | — | Installer | — |
| Christian Arnold | — | Installer | — |
| Christopher Collins | — | InstallerPumper | — |
| Christopher Mattox | — | Installer | — |
| Clint Beason | — | Installer | — |
| Donnie Johnson | — | Installer | — |
| Edward Houston | — | Installer | — |
| James Hunter | — | Installer | — |
| James Lee | — | Installer | — |
| Jeremy Lawton | — | InstallerPumper | — |
| Jeremy Thomas | — | Installer | — |
| Johnny Clem | — | InstallerPumper | — |
| Jordan Frazier | — | InstallerPumper | — |
| Josh Burt | — | Installer | — |
| Kenneth Otinger | — | Installer | — |
| L. Lee Davis | — | Installer | — |
| Marcus Gipson | — | Installer | — |
| Michael Cruse | — | Installer | — |
| Michael Gilbreath | — | InstallerPumper | — |
| Michael Hall | — | Installer | — |
| Michael Houston | — | Installer | — |
| Nathan Watters | — | Installer | — |
| Ricky Butts | — | Installer | — |
| Rodney Ivey | — | Installer | — |
| Shawn Michael Hall | — | Installer | — |
| Troy Jiles | — | Installer | — |
| Van Knight | — | Installer | — |
| Wade Taylor | — | Installer | — |
| Will Mattox | — | Installer | — |
| William Bryan | — | Installer | — |
| Zachery Guffey | — | Installer | — |
33 companies in the Alabama Onsite Wastewater Board licensee roster are based in Dekalb County as of 2026-07-23. Companies based elsewhere in Alabama also commonly serve the county.
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