| Company | Location | Certifications | License # |
|---|---|---|---|
| A&B Homes Llc | Fort Lawn, SC | Installer (Tier 2) | OSWWI0547 |
| Cauthen'S Truck & Tractor | Fort Lawn, SC | Installer (Tier 2) | OSWWI0036 |
| Christine Lechizer | Fort Lawn, SC | Installer (Tier 2) | OSWWI0051 |
| Franklin Starnes | Edgemoor, SC | Installer (Tier 2) | OSWWI0661 |
| Ingrams Quality Services Llc | Great Falls, SC | Installer (Tier 2) | OSWWI0488 |
| J & F Construction Co | Richburg, SC | Installer (Tier 2) | 12-367-12037 |
| Jb Dirt Works & Farm Llc. | Blackstock, SC | Installer (Tier 2) | 12-367-12047 |
| John Matthew Durand | Chester, SC | Installer (Tier 2) | OSWWI0361 |
| Lenard Price | Chester, SC | Installer (Tier 2) | 12-367-12028 |
| Lisenby Grading, Llc | Chester, SC | Installer (Tier 2) | OSWWI0314 |
| Lloyd'S Unlimited | Chester, SC | Installer (Tier 2) | OSWWI0360 |
| Mayhugh Enterprises, Llc. | Chester, SC | Installer (Tier 2) | 46-367-46237 |
| Millsaps Services Llc | Chester, SC | Pumper | OSWWP0098 |
| Pro Builders & Services | Blackstock, SC | Installer (Tier 2) | 12-367-12046 |
| R.A.M Septic | Great Falls, SC | Installer (Tier 2) | OSWWI0616 |
| Rd Simoes, Inc | Edgemoor, SC | Installer (Tier 2) | OSWWI0089 |
| Robert W Lee Jr | Chester, SC | Installer (Tier 2) | 12-367-12012 |
| Septic Cpr Ltd. Co. | Richburg, SC | Installer (Tier 2) | OSWWI0533 |
| Stroud Plumbing | Chester, SC | Installer (Tier 2) | 12-367-12024 |
| Wilson Septic Tank Service | Great Falls, SC | Installer (Tier 2) | 12-367-12018 |
| Wilson Septic Tank Service | Great Falls, SC | Pumper | 12-368-12004 |
21 companies in the SCDES on-site wastewater (OSWW) contractor registry are based in Chester County as of 2026-07-23. Companies based elsewhere in South Carolina also commonly serve the county.
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