| Company | Location | Certifications | License # |
|---|---|---|---|
| Bishop Family 3 Llc | Greenwood, SC | Installer (Tier 2) | OSWWI0514 |
| Boggero Septic | Greenwood, SC | Installer (Tier 2) | 24-367-24069 |
| Boggero'S Portable Toilets Llc | Greenwood, SC | Pumper | OSWWP0185 |
| Boggero'S Septic Tank | Greenwood, SC | Pumper | 24-368-24019 |
| Boggs Septic | Ninety Six, SC | Installer (Tier 2) | 24-367-24067 |
| C M Backhoe | Greenwood, SC | Installer (Tier 2) | 24-367-24045 |
| Chandler Construction Svcs Inc | Ninety Six, SC | Installer (Tier 2) | 24-367-24070 |
| E J Sullivan | Greenwood, SC | Installer (Tier 2) | 24-367-24059 |
| Gibson Backhoe & Dozer | Greenwood, SC | Installer (Tier 2) | 24-367-24034 |
| Gibson Backhoe & Dozer | Greenwood, SC | Pumper | 24-368-24018 |
| J & K Land Solutions | Greenwood, SC | Installer (Tier 2) | OSWWI0524 |
| J & K Land Solutions Llc | Greenwood, SC | Installer (Tier 2) | OSWWI0462 |
| Junior Norman S/T Service | Greenwood, SC | Installer (Tier 2) | 24-367-24028 |
| Kelley General Contractors | Greenwood, SC | Installer (Tier 2) | 24-367-24054 |
| Lakeview Grading & Hardscape | Greenwood, SC | Installer (Tier 2) | OSWWI0712 |
| Majestic Creations Landscaping | Greenwood, SC | Installer (Tier 2) | 24-367-24061 |
| Patriots Portable Service | Donalds, SC | Pumper | OSWWP0072 |
| Pgh Sewer & Grading Llc | Greenwood, SC | Installer (Tier 2) | 24-367-24068 |
| Premier Septic Llc | Hodges, SC | Pumper | 24-368-24021 |
| S B Of Greenwood Inc | Greenwood, SC | Installer (Tier 2) | 24-367-24044 |
| Suttles Septic Services | Greenwood, SC | Pumper | 24-368-24022 |
| The Cwt Company Inc | Greenwood, SC | Installer (Tier 2) | 24-367-24056 |
| Thomas Suttles | Greenwood, SC | Installer (Tier 2) | 24-367-24073 |
| Threlko Inc. | Ninety Six, SC | Installer (Tier 2) | OSWWI0319 |
| Werts Utility Construction | Ninety Six, SC | Installer (Tier 2) | 24-367-24019 |
25 companies in the SCDES on-site wastewater (OSWW) contractor registry are based in Greenwood County as of 2026-07-23. Companies based elsewhere in South Carolina also commonly serve the county.
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