| Company | Location | Certifications | License # |
|---|---|---|---|
| Bill Majors Construction | Pleasant Hope, MO | Installer (Level Advanced) | 38033 |
| Brush Dominator | Fair Play, MO | Installer (Level Basic) | 39021 |
| Case Landworx | Halfway, MO | Installer (Level Advanced) | 38788 |
| D&D Drilling And Services | Miller, MO | Installer (Level Basic) | 39384 |
| Davis Excavating Service Llc | Everton, MO | Installer (Level Basic) | 37609 |
| Dexter'S Plumbing & Excavation | Stockton, MO | Installer (Level Basic) | 35132 |
| Farmer Septic Llc | Fair Play, MO | Installer (Level Advanced) | 39526 |
| Frieze Construction | Fairplay, MO | Installer (Level Advanced) | 32725 |
| Hannah'S Excavating & Trucking, Llc | Fair Play, MO | Installer (Level Basic) | 38561 |
| Hef Excavating | Fair Grove, MO | Installer (Level Basic) | 38928 |
| Hef Excavating Llc | Fair Grove, MO | Installer (Level Basic) | 38927 |
| Huggins Home Improvement (Hhi) | Morrisville, MO | Installer (Level Basic) | 38656 |
| Hutchinson Excavation | — | Installer (Level Basic) | 33448 |
| J&L Exccavating Llc | Morrisville, MO | Installer (Level Basic) | 33637 |
| James Walborn | Stockton, MO | Installer (Level Basic) | 38974 |
| Justin Cody Condict | Ash Grove, MO | Installer (Level Advanced) | 33625 |
| Latham Melton-Farmer | Halfway, MO | Installer (Level Advanced) | 38792 |
| Legend Contracting | Humansville, MO | Installer (Level Basic) | 38660 |
| Lynch Farms And Excavating Llc | Hermitage, MO | Installer (Level Basic) | 38674 |
| Mathews Brothers Enterprise, Llc | Osceola, MO | Installer (Level Advanced) | 33472 |
| Myers Grading & Services, Llc | Morrisville, MO | Installer (Level Basic) | 36419 |
| Price Excavation Llc | Bolivar, MO | Installer (Level Basic) | 38851 |
| Randy Hughes Backhoe Service | Fair Play, MO | Installer (Level Advanced) | 33620 |
| Reed'S Excavation And Trucking Llc | Bolivar, MO | Installer (Level Basic) | 34804 |
| Rob'S Backhoe | Bolivar, MO | Installer (Level Basic) | 30394 |
| Robert A Elder | Bolivar, MO | Installer (Level Basic) | 35042 |
| Scott Smith Backhow Service Llc | Stockton, MO | Installer (Level Basic) | 38784 |
| Snodgrass Clearing & Excavation Llc | Bolivar, MO | Installer (Level Basic) | 38970 |
| Strickland Backhoe & Trucking | Long Lane, MO | Installer (Level Basic) | 30355 |
| Triple C Land Management | Aldrich, MO | Installer (Level Advanced) | 39360 |
| Wallace Construction Llc | Bolivar, MO | Installer (Level Advanced) | 34089 |
| Ynot Dirtworks | Bolivar, MO | Installer (Level Advanced) | 39082 |
32 companies in the Missouri DHSS registered OWTS installer list are based in Cedar County as of 2026-07-23. Companies based elsewhere in Missouri also commonly serve the county.
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