| Company | Location | Certifications | License # |
|---|---|---|---|
| 2 B'S Homes Inc | Yadkinville, NC | Installer (Level II) | 11738 |
| Ace Grading & Environmental | Boonville, NC | Installer (Level IV) | 6344 |
| B & B Mowing Landscape & Grading | Yadkinville, NC | Installer (Level II) | 9974 |
| B & B Mowing Landscape & Grading | Yadkinville, NC | Installer (Level II) | 9973 |
| Black Diamond Industrial Llc | Yadkinville, NC | Installer (Level II) | 11183 |
| Ctis | Yadkinville, NC | Installer (Level II) | 15124 |
| Darrell Salmons Grading & Hauling | Yadkinville, NC | Installer (Level IV)Inspector | 2652 |
| Don Adams Grading Inc | Yadkinville, NC | Installer (Level II) | 3193 |
| Gator Grading | Yadkinville, NC | Installer (Level II) | 9423 |
| Grimes Septic Tank Pumping | Boonville, NC | Installer (Level II) | 5170 |
| Hallie J'S | Yadkinville, NC | Installer (Level II) | 7993 |
| Jbs Excavating | East Bend, NC | Installer (Level II) | 9830 |
| Jeffrey Johnson Backhoe Service | Elkin, NC | Installer (Level II) | 9045 |
| Jr Land Solutions Llc | Yadkinville, NC | Installer (Level II) | 15081 |
| Lundy And Sons Construction Llc | Yadkinville, NC | Installer (Level II) | 14868 |
| Phillips Concrete Construction | Yadkinville, NC | Installer (Level II) | 2646 |
| Quickdraw Enterprises | Yadkinville, NC | Installer (Level II) | 4423 |
| Ron Adams Excavating | Yadkinville, NC | Installer (Level II) | 2577 |
| Rw Eagle Construction | Elkin, NC | Installer (Level II) | 9353 |
| Superior Land Management Llc | Hamptonville, NC | Installer (Level II) | 9493 |
| T B Grading | Jonesville, NC | Installer (Level II) | 4700 |
| Todd Brothers Plumbing | Yadkinville, NC | Installer (Level II) | 11032 |
| Todd Brothers Plumbing | Yadkinville, NC | Installer (Level II) | 14243 |
| Travis Eugene Shore | East Bend, NC | Installer (Level II) | 15184 |
| Zc Grading & Land Management Llc | Yadkinville, NC | Installer (Level II) | 15387 |
25 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Yadkin County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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