| Company | Location | Certifications | License # |
|---|---|---|---|
| Ace Plumbing, Electric, Heating And Air Llc | Williamston, SC | Installer (Tier 2) | OSWWI0668 |
| American States Utility Services(Psus) | Fort Jackson, SC | Pumper | OSWWP0179 |
| Apple Services Plumbing | Irmo, SC | Pumper | OSWWP0114 |
| B&K Grading And Paving, Llc | Aiken, SC | Pumper | OSWWP0121 |
| Carolina Digz | N Myrtle Bch, SC | Installer (Tier 2) | OSWWI0677 |
| Construction Waste Svcs Columb | Columbia, SC | Pumper | 40-368-40040 |
| Davis Environmental Llc | Columbia, SC | Installer (Tier 2) | OSWWI0569 |
| E & D Enterprises Inc | Columbia, SC | Pumper | 40-368-40013 |
| Eargle Septic & Backhoe Servic | Columbia, SC | Installer (Tier 2) | 40-367-40051 |
| Enegue Llc | Eastover, SC | Installer (Tier 2) | 40-367-40065 |
| Flush Group | Woodruff, SC | Installer (Tier 2) | OSWWI0321 |
| Fusionsite Services Dba Portable Services | Columbia, SC | Pumper | OSWWP0092 |
| Gray Portable Toilet Services | Columbia, SC | Pumper | 38-368-38023 |
| Kleene Greene Grease Services | Irmo, SC | Pumper | 40-368-40039 |
| Local Waste Service | Columbia, SC | Pumper | OSWWP0013 |
| Midlands | Columbia, SC | Installer (Tier 2) | OSWWI0753 |
| Moye Septic & Porta John Svc L | Hopkins, SC | Pumper | 40-368-40035 |
| Moye Septic & Porta John Svc Llc | Hopkins, SC | Installer (Tier 2) | OSWWI0184 |
| Palmetto Septic Install & Repair | Blythewood, SC | Installer (Tier 2) | OSWWI0620 |
| Providence Environmental Inc | Columbia, SC | Pumper | 40-368-40029 |
| R Smith Grading Llc | Seneca, SC | Installer (Tier 2) | OSWWI0365 |
| Rent Ready Low Country | Ladson, SC | Installer (Tier 2) | OSWWI0801 |
| Santech, Llc | Saluda, SC | Installer (Tier 2) | OSWWI0443 |
| Santech, Llc | Saluda, SC | Pumper | OSWWP0103 |
| Septimio Construction Inc | Columbia, SC | Installer (Tier 2) | OSWWI0154 |
| Sharpe'S Contracting | Blythewood, SC | Installer (Tier 2) | 40-367-40060 |
| Smallworks Llc | Travelers Rst, SC | Installer (Tier 2) | OSWWI0390 |
| Turd Burglars | Irmo, SC | Installer (Tier 2) | OSWWI0755 |
| Turd Burglars Llc | Irmo, SC | Installer (Tier 2) | OSWWI0756 |
| Turd Burglars Llc | Irmo, SC | Pumper | 40-368-40042 |
30 companies in the SCDES on-site wastewater (OSWW) contractor registry are based in Richland County as of 2026-07-23. Companies based elsewhere in South Carolina also commonly serve the county.
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