| Company | Location | Certifications | License # |
|---|---|---|---|
| Abegglen Construction Inc | Saint Anthony, ID | Installer | — |
| Aspen Ridge Excavation LLC | Saint Anthony, ID | Installer | — |
| Bob's Excavation Service LLC | Saint Anthony, ID | Installer | — |
| Bollinger & Sons Trucking & Excavation | Ashton, ID | Installer | — |
| Centennial Excavation | Island Park, ID | Installer | — |
| Dad's Construction LLC | Island Park, ID | Installer | — |
| Desert Gem Trucking & Excavation | Saint Anthony, ID | Installer | — |
| Diamond S Excavation | Saint Anthony, ID | Installer | — |
| Glenn Armstrong | Saint Anthony, ID | Installer | — |
| H & M Astin Homes LLC | Saint Anthony, ID | Installer | — |
| Hunter's Sewer and Drain | Saint Anthony, ID | Installer | — |
| Island Park Excavation LLC | Ashton, ID | Installer | — |
| Island Park Services | Island Park, ID | Installer | — |
| Juniper Mountain Excavation Inc | Saint Anthony, ID | Installer | — |
| Parkers Septic Tank Service | Saint Anthony, ID | Pumper | — |
| T&T Plumbing Inc | Ashton, ID | Installer | — |
| Taylor Excavation LLC | Ashton, ID | Installer | — |
| Timberline Excavation LLC | Island Park, ID | Installer | — |
| Wild West Construction and Supply | Island Park, ID | Installer | — |
19 companies in the Idaho DEQ permitted subsurface sewage disposal system installers and septic tank pumpers are based in Fremont County as of 2026-07-23. Companies based elsewhere in Idaho also commonly serve the county.
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