| Company | Location | Certifications | License # |
|---|---|---|---|
| A & F Land Management | Tabor City, NC | Installer (Level II) | 15445 |
| Abcd Construction | Bolton, NC | Installer (Level II) | 3289 |
| B Williamson And Sons Maintenance Llc | Delco, NC | Installer (Level II) | 9505 |
| Bailey Excavating | Whiteville, NC | Installer (Level IV) | 2945 |
| Baldwin Excavation And Septic Services | Whiteville, NC | Installer (Level II) | 14555 |
| Bcw Managements Llc | Delco, NC | Installer (Level II) | 14766 |
| Big Oak Trucking Llc | Delco, NC | Installer (Level II) | 6779 |
| Boggy Branch Hauling And Land Mgmt Llc | Delco, NC | Installer (Level II) | 11297 |
| Carolina Landworks & Mulching Llc | Chadbourn, NC | Installer (Level II) | 11380 |
| Christopher J Ward | Whiteville, NC | Installer (Level II) | 11198 |
| Daryl Wayne Garrell | Chadbourn, NC | Installer (Level II) | 15446 |
| Dba: Back Woods Hauling | Delco, NC | Installer (Level IV) | 5506 |
| Dominion Land Group Llc | Whiteville, NC | Installer (Level II) | 9723 |
| Donald Michael Stanley | Tabor City, NC | Installer (Level II) | 14120 |
| Donna Stanley | Tabor City, NC | Installer (Level II) | 14121 |
| Doug King Construction | Delco, NC | Installer (Level II) | 7326 |
| Eric Leron Watts | Tabor City, NC | Installer (Level II) | 14732 |
| Hoffman Land Solutions Llc | Chadbourn, NC | Installer (Level II) | 11399 |
| Jeremy Gore | Nakina, NC | Installer (Level II) | 9840 |
| Joseph Kemp Heye | Whiteville, NC | Installer (Level II) | 11185 |
| Kevin Horne Service'S Llc | Whiteville, NC | Installer (Level II) | 15022 |
| Malpass Trucking Llc | Delco, NC | Installer (Level II) | 14202 |
| Monk'S Landscaping Llc | Whiteville, NC | Installer (Level II) | 11152 |
| Optimus Construction | Whiteville, NC | Installer (Level II) | 15342 |
| Prince Development Corporation | Whiteville, NC | Installer (Level II) | 4610 |
| Pvi Enterprises | Tabor City, NC | Inspector | 6020I |
| Rayford Harrelson | Tabor City, NC | Installer (Level II) | 12041 |
| Register'S Excavating & Land Dev | Whiteville, NC | Installer (Level II) | 3089 |
| Rising Water Septic | Whiteville, NC | Installer (Level II)Inspector | 14415 |
| Rudolph Inman Septic Tank | Whiteville, NC | Installer (Level IV) | 1088 |
| Straight Line Clearing | Lake Waccamaw, NC | Installer (Level II) | 9470 |
| Timothy Jerome Ellis | Delco, NC | Installer (Level II) | 14183 |
| Triple Aaa | Nakina, NC | Installer (Level II) | 9742 |
| Z Brothers | Nakina, NC | Installer (Level II) | 14745 |
34 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Columbus County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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