| Company | Location | Certifications | License # |
|---|---|---|---|
| Active Excavation Incorporated | New Meadows, ID | Installer | — |
| Austin Excavating and Tractor Service | McCall, ID | Installer | — |
| Avery Earthworks | Donnelly, ID | Installer | — |
| Best of Idaho, Inc. | McCall, ID | Installer | — |
| C and A Excavating LLC | Cascade, ID | Installer | — |
| Clayton Simpsons Excavating Inc | McCall, ID | Installer | — |
| Dirt Pyle Excavation | Lucile, ID | Installer | — |
| Elkhorn Property Services | Cascade, ID | Installer | — |
| Falveys LLC | McCall, ID | Installer | — |
| Finite Concepts, LLC | Kamiah, ID | Installer | — |
| Forge Landworks, LLC | McCall, ID | Installer | — |
| Freelon Property Services | McCall, ID | Installer | — |
| Granite Excavation | Cascade, ID | Installer | — |
| H and A Excavation | Donnelly, ID | Installer | — |
| Hayven Plumbling | Cascade, ID | Pumper | — |
| Honey Dippers Inc. | McCall, ID | Pumper | — |
| J and R Septic | Cascade, ID | Pumper | — |
| JT and Company Inc | Donnelly, ID | Installer | — |
| K2 Excavation & Construction | McCall, ID | Installer | — |
| Landers Enterprises | Cascade, ID | Installer | — |
| NDI Contracting Inc | McCall, ID | Installer | — |
| OK Gravel Works LLC | Cascade, ID | Installer | — |
| P & M Excavation II | McCall, ID | Installer | — |
| Paradigm Custom Homes | McCall, ID | Installer | — |
| R and N Welding and Repair | McCall, ID | Installer | — |
| Randy Morell Excavating and Construction | McCall, ID | Installer | — |
| Riverbound Excavation | Cascade, ID | Installer | — |
| Swain Excavation | McCall, ID | Installer | — |
| Tom Bateman | McCall, ID | Installer | — |
| Tony Meckel Excavating Inc | McCall, ID | Installer | — |
| Triple J Construction | Cascade, ID | Installer | — |
31 companies in the Idaho DEQ permitted subsurface sewage disposal system installers and septic tank pumpers are based in Valley County as of 2026-07-23. Companies based elsewhere in Idaho also commonly serve the county.
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