| Company | Location | Certifications | License # |
|---|---|---|---|
| Brian Johnson | — | Installer (Level Basic) | 39380 |
| Cso Environmental Services, Inc | Springfield, MO | Installer (Level Advanced) | 39085 |
| Kcjw Enterprises Llc | Farmington, MO | Installer (Level Advanced) | 38098 |
| Regional Property Maint. | Cape Girardeau, MO | Installer (Level Advanced) | 39446 |
| Sensible Solutions | Kelso, MO | Installer (Level Basic) | 39277 |
| Williams Construction & Excavating Llc | St. Mary'S, MO | Installer (Level Basic) | 33581 |
6 companies in the Missouri DHSS registered OWTS installer list are based in Cape Girardeau County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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