| Company | Location | Certifications | License # |
|---|---|---|---|
| 95 North Rentals & Excavation | Bonners Ferry, ID | Installer | — |
| Andrews Excavation | Moyie Springs, ID | Installer | — |
| Cedar Mountain Homes LLC | Bonners Ferry, ID | Installer | — |
| Chapman Excavation | Bonner Ferry, ID | Installer | — |
| Dirtworx | Naples, ID | Installer | — |
| Duarte Construction Inc. | Bonners Ferry, ID | Installer | — |
| Fulton Quality Construction LLC | Bonners Ferry, ID | Installer | — |
| Kauffman Excavation LLC | Bonners Ferry, ID | Installer | — |
| Kellys Excavating Company | Bonners Ferry, ID | Installer | — |
| KG&T Septic | Bonners Ferry, ID | Installer | — |
| KG&T Septic Service Inc. | Bonners Ferry, ID | Pumper | — |
| Laflin Construction | Bonners Ferry, ID | Installer | — |
| Mastre Backhoe Service Inc. | Bonners Ferry, ID | Installer | — |
| Meadow Creek Excavation | Bonners Ferry, ID | Installer | — |
| Natures Landscaping Design & Excavation Inc. | Naples, ID | Installer | — |
| No Boundaries Services LLC | Moyie Springs, ID | Installer | — |
| Pinnacle Septic & Excavation | Bonners Ferry, ID | Installer | — |
| PLS Handyman & Construction LLC | Bonners Ferry, ID | Installer | — |
| Redline Landscape & Excavation | Bonners Ferry, ID | Installer | — |
| S&L Underground Inc. | Bonners Ferry, ID | Installer | — |
| Selkirk Septic Pumping Inc. | Bonners Ferry, ID | Pumper | — |
| Tamarack Innovations | Bonners Ferry, ID | Installer | — |
| West Wood LLC | Bonners Ferry, ID | Installer | — |
| Wink Inc.orporated | Bonners Ferry, ID | Installer | — |
24 companies in the Idaho DEQ permitted subsurface sewage disposal system installers and septic tank pumpers are based in Boundary County as of 2026-07-23. Companies based elsewhere in Idaho also commonly serve the county.
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