| Company | Location | Certifications | License # |
|---|---|---|---|
| B & B Backhoe | Stilwell, OK | Installer (Subsurface, Lagoon, Aerobic Spray) | 328 |
| Morris Jones Backhoe and Dozer | Stilwell, OK | Installer (Subsurface, Lagoon) | 194 |
| Radtke Backhoe Service | Stilwell, OK | Installer (Subsurface) | 611 |
| Thompsons Backhoe Service | Stilwell, OK | Installer (Subsurface) | 609 |
4 companies in the Oklahoma DEQ certified septic installers and licensed septage pumpers/transporters are based in Adair County as of 2026-07-23. Companies based elsewhere in Oklahoma also commonly serve the county.
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