| Company | Location | Certifications | License # |
|---|---|---|---|
| Double E Excavating, Inc. | Maywood, MO | Installer (Level Basic) | 34378 |
| Fire And Ice Enterprises | Revere, MO | Installer (Level Basic) | 37097 |
| Miller Land Management | Taylor, MO | Installer (Level Basic) | 39501 |
| Sutter Trucking & Excavating, Inc. | Taylor, MO | Installer (Level Advanced) | 30202 |
4 companies in the Missouri DHSS registered OWTS installer list are based in Clark County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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