| Company | Location | Certifications | License # |
|---|---|---|---|
| Apex Excavation Llc | Jackson, MO | Installer (Level Basic) | 39496 |
| Ardeola Septic Systems | Advance, MO | Installer (Level Advanced) | 38490 |
| Benjamin R Zimmerman | Doe Run, MO | Installer (Level Advanced) | 36986 |
| C&S Well Service, Llc | Daisy, MO | Installer (Level Advanced) | 30726 |
| Chad'S Septic & Backhoe Service Llc | Perryville, MO | Installer (Level Advanced) | 37645 |
| Dtr Farms Llc | Marble Hill, MO | Installer (Level Advanced) | 38004 |
| Dutch Enterprises | Jackson, MO | Installer (Level Advanced) | 39033 |
| Earth First Contractors | Perryville, MO | Installer (Level Advanced) | 35060 |
| Eddie Cook Enterprises | Marble Hill, MO | Installer (Level Advanced) | 30741 |
| Eddie Cook Enterprises | Marble Hill, MO | Installer (Level Basic) | 38538 |
| Eddie Cook'S Excavating | Marble Hill, MO | Installer (Level Advanced) | 30731 |
| Fil-Billy Excavation & Hauling | Perry, MO | Installer (Level Basic) | 38895 |
| Foltz Brothers Construction | Sedgewickville, MO | Installer (Level Advanced) | 38655 |
| Jamie Horton | — | Installer (Level Basic) | 39378 |
| Jb Digs, Llc | Black, MO | Installer (Level Advanced) | 39407 |
| Jdm Development Solutions | Patterson, MO | Installer (Level Basic) | 38821 |
| Jim Goggin Excavating, Inc | Cape Girardeau, MO | Installer (Level Basic) | 36198 |
| Joseph Layton | Glen Allen, MO | Installer (Level Basic) | 38520 |
| Joshua Moore | — | Installer (Level Advanced) | 39544 |
| Keith Cook'S Backhoe Llc | Sedgewickville, MO | Installer (Level Advanced) | 30815 |
| Kil-Con, Inc. | Marble Hill, MO | Installer (Level Advanced) | 31927 |
| Kramer Plumbing, Septic & Sewer Inc | Jackson, MO | Installer (Level Advanced) | 33405 |
| Logan Blevins Excavation | Cape Girardeau, MO | Installer (Level Basic) | 39000 |
| Matthew Bollinger | Jackson, MO | Installer (Level Basic) | 38288 |
| Mwe Excavating, Llc | Zalma, MO | Installer (Level Basic) | 33580 |
| Newell'S Ram Power Llc | Millersville, MO | Installer (Level Advanced) | 39308 |
| Newll'S Ram Power Llc | Millersville, MO | Installer (Level Advanced) | 39302 |
| None | Jackson, MO | Installer (Level Basic) | 38828 |
| Norvell Services Llc | Fredericktown, MO | Installer (Level Advanced) | 33895 |
| Outlaw Excavating Llc | Desoto, MO | Installer (Level Basic) | 38830 |
| Piedmont Plumbing, Llc | Patterson, MO | Installer (Level Advanced) | 36361 |
| Prestige Plumbing & Air | Cape Girardeau, MO | Installer (Level Basic) | 37834 |
| Putz Construction Llc | Jackson, MO | Installer (Level Advanced) | 32368 |
| Roth Dirt Worx | Greenville, MO | Installer (Level Basic) | 38823 |
| Roth Dirt Worx | Greenville, MO | Installer (Level Basic) | 38894 |
| Schumer'S Wastewater Solutions Llc | Dexter, MO | Installer (Level Basic) | 39468 |
| Sewage Pump Solutions | Desoto, MO | Installer (Level Advanced) | 38884 |
| Shoemaker Trucking & Backhoe | Fredericktown, MO | Installer (Level Basic) | 30932 |
| Thompson Excavating | Fredericktown, MO | Installer (Level Advanced) | 34991 |
| Tj Riley Contracting | Bonne Terre, MO | Installer (Level Advanced) | 38854 |
| Trenton Goodale | — | Installer (Level Advanced) | 37729 |
| Vangennip & Sons Backhoe | Marble Hill, MO | Installer (Level Basic) | 32687 |
42 companies in the Missouri DHSS registered OWTS installer list are based in Bollinger County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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