| Company | Location | Certifications | License # |
|---|---|---|---|
| Bk Hauling Llc | Pleasant Home, MO | Installer (Level Basic) | 38676 |
| Bosco S Backhoe | Tunas, MO | Installer (Level Basic) | 30087 |
| Breshears Pump Company | Pittsburg, MO | Installer (Level Advanced) | 30360 |
| Collins Skid Steer Service, Llc | Elkland, MO | Installer (Level Basic) | 38697 |
| Crouch Excavating | Buffalo, MO | Installer (Level Basic) | 38653 |
| Ej Onsite Llc | Buffalo, MO | Installer (Level Advanced) | 34919 |
| Gator Construction | Springfield, MO | Installer (Level Advanced) | 35906 |
| Gisselbeck Construction & Excavation | Phillipsburg, MO | Installer (Level Advanced) | 30336 |
| Howard Backhoe & Supply | Long Lane, MO | Installer (Level Basic) | 35616 |
| Jeremiah La Fon | — | Installer (Level Basic) | 39016 |
| John Long Backhoe | Long Lane, MO | Installer (Level Basic) | 39282 |
| Legacy Landmarks Llc | Bolivar, MO | Installer (Level Advanced) | 39504 |
| Miller Excavating Llc | Niangua, MO | Installer (Level Advanced) | 36575 |
| Team Roderick | — | Installer (Level Basic) | 38967 |
| Team Roderick Backhoe & Gravel | Goodson, MO | Installer (Level Basic) | 38968 |
15 companies in the Missouri DHSS registered OWTS installer list are based in Dallas County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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