| Company | Location | Certifications | License # |
|---|---|---|---|
| Absolute Property Management | Mill Spring, NC | Installer (Level II) | 11825 |
| Aden Greene | Rutherfordton, NC | Installer (Level II) | 5778 |
| Angela M Halford | Mill Sring, NC | Installer (Level II) | 9729 |
| Barber Landscaping Llc | Mill Spring, NC | Installer (Level II) | 15087 |
| Better Than New Llc | Mill Spring, NC | Installer (Level II) | 14873 |
| Carney Landscaping Llc | Mill Spring, NC | Installer (Level II) | 8098 |
| Cornerstone Contracting Llc | Columbus, NC | Installer (Level IV) | 11857 |
| Cornerstone Contracting Llc | Columbus, NC | Installer (Level IV) | 11877 |
| Curtis Pace Construction | Saluda, NC | Installer (Level II) | 7210 |
| Curtis Pace Construction | Saluda, NC | Installer (Level II) | 1533 |
| D & N Septic | Saluda, NC | Installer (Level II) | 15357 |
| Eco Development Inc | Mill Spring, NC | Installer (Level II) | 2947 |
| Eli Fritz Construction Inc | Saluda, NC | Installer (Level II) | 1482 |
| Eli Fritz Construction Inc | Saluda, NC | Installer (Level II) | 4901 |
| Grindstaff'S Septic Installer | Mill Springs, NC | Installer (Level II) | 11139 |
| Groundbreaking Excavation & Hauling | Columbus, NC | Installer (Level II) | 15269 |
| Hamilton Landscaping | Saluda, NC | Installer (Level II) | 2228 |
| Holberts Grading & Excavation Llc | Columbus, NC | Installer (Level II) | 15330 |
| Ives Footer And Grading Llc | Columbus, NC | Installer (Level II) | 11395 |
| J H Grading | Fletcher, NC | Installer (Level II) | 6374 |
| J'S Septic And Installment | Mill Spring, NC | Installer (Level II) | 11138 |
| Jackson Remodeling | Mill Spring, NC | Installer (Level II) | 14848 |
| Mccraw Grading | Columbus, NC | Installer (Level II) | 3070 |
| Michael Chaffin | Tryon, NC | Installer (Level II) | 14576 |
| Modern Septic Llc | Tryon, NC | Installer (Level II) | 9006 |
| Owensby'S Backhoe & Pumping | Mill Spring, NC | Installer (Level II) | 2642 |
| Paul Ruff | Mill Spring, NC | Installer (Level II) | 3147 |
| Pro Pumping And Grading Llc | Mill Spring, NC | Installer (Level II) | 9795 |
| Pro Pumping And Grading Llc | Mill Spring, NC | Installer (Level II) | 9796 |
| Roy Shatto Grading & Logging | Mill Spring, NC | Installer (Level II) | 4329 |
| Shehan'S Grading | Mill Spring, NC | Installer (Level II) | 3244 |
| Solid Rock Grading And Septic Llc | Hendersonville, NC | Installer (Level II) | 9613 |
| Swanson Project Management | Mill Spring, NC | Installer (Level II) | 14432 |
| The Workx | Columbus, NC | Installer (Level IV) | 5154 |
| Tims Rod Wrench & Consulting Llc | Rutherfordton, NC | Installer (Level II) | 8035 |
| Tripel A Sanitation Inc | Mill Spring, NC | Installer (Level II) | 14399 |
| Triple R Construction | Rutherfordton, NC | Installer (Level II) | 15397 |
| Turners Grading & Septic Tank | Mill Spring, NC | Installer (Level II) | 9011 |
| Turners Grading & Septic Tank | Mill Spring, NC | Installer (Level II) | 9012 |
| Turners Grading & Septic Tank | Mill Spring, NC | Installer (Level II) | 3148 |
40 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Polk County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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