| Company | Location | Certifications | License # |
|---|---|---|---|
| Big Carls Llc | Cedarcreek, MO | Installer (Level Advanced) | 38027 |
| Revival Land And Handyman | Gainesville, MO | Installer (Level Basic) | 39451 |
| Steve Hart Excavating | Theodosia, MO | Installer (Level Advanced) | 34111 |
3 companies in the Missouri DHSS registered OWTS installer list are based in Ozark County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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