| Company | Location | Certifications | License # |
|---|---|---|---|
| Broken Shackle Ranch | — | Installer | — |
| Chambers Construction & Septic Service | — | InstallerPumper | — |
| Dream Works Residential Home | — | Installer | — |
| Frost Drilling LLC | — | Installer | — |
| Jackson Septic & Plumbing Services, LLC | — | InstallerPumper | — |
| M&M Plumbing | — | Installer | — |
| Mel Daniel Heating Cooling and Electrical LLC | — | Installer | — |
| Nolan Excavating and Siteworks LLC | — | Installer | — |
| Sandersville Well & Septic Co. | — | InstallerPumper | — |
9 companies in the Georgia DPH certified septic installer & approved pumper lists are based in Washington County as of 2026-07-23. Companies based elsewhere in Georgia also commonly serve the county.
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