| Company | Location | Certifications | License # |
|---|---|---|---|
| Custom Power Excavating, Inc | Rosebud, MO | Installer (Level Advanced) | 30035 |
| On Grade Dirt Works | Loose Creek, MO | Installer (Level Advanced) | 37823 |
2 companies in the Missouri DHSS registered OWTS installer list are based in Cole County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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