| Company | Location | Certifications | License # |
|---|---|---|---|
| Alpha Precision Soil Science Pllc | Murphy, NC | Designer (Soil Evaluator) | 10058E |
| Ammons Contracting | Robbinsville, NC | Installer (Level II) | 11436 |
| Bradley Guffie | Belmont, NC | Installer (Level II) | 14361 |
| Burchfield'S Tree Service | Robbinsvile, NC | Installer (Level II) | 4920 |
| Capps Septic Pumping & Installing | Robbinsville, NC | Installer (Level II) | 11493 |
| Capps Septic Pumping & Installing | Robbinsville, NC | Installer (Level II) | 11492 |
| Darrin'S Septic Service | Robbinsville, NC | Installer (Level II) | 9518 |
| David Mitchell Holder | Robbinsville, NC | Installer (Level II) | 1379 |
| Finnish Excavating Llc | Robbinsville, NC | Installer (Level II) | 11355 |
| Jack'S Welding Service/Septic | Robbinsville, NC | Installer (Level II) | 11815 |
| James A Bird | Robbinsville, NC | Installer (Level II) | 14561 |
| Jon Andrews Enterprises Inc | Almond, NC | Installer (Level IV)Inspector | 1695 |
| Jr Cody Construction | Robbinsville, NC | Installer (Level II) | 5367 |
| Kerr Douglas Cable | Almond, NC | Installer (Level II) | 1364 |
| M. C. R. Ecavating | Robbinsville, NC | Installer (Level II) | 3824 |
| Michael R Phillips | Robbinsville, NC | Installer (Level II) | 3227 |
| Millsaps Contracting | Robbinsville, NC | Installer (Level II) | 11620 |
| Rex David Waldroup | Hayesville, NC | Installer (Level II) | 1690 |
| Sellers Septic Service | Robbinsville, NC | Installer (Level II) | 7126 |
| Two Turkeys Cont | Robbinsville, NC | Installer (Level II) | 1645 |
20 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Graham County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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