| Company | Location | Certifications | License # |
|---|---|---|---|
| A-1 Septic Tank Company | Charleston, SC | Installer (Tier 2) | 10-367-10038 |
| A-1 Septic Tank Company | Charleston, SC | Pumper | 10-368-10001 |
| All Hers Hauling And Sitework | Ravenel, SC | Installer (Tier 2) | OSWWI0231 |
| Axyl Engstrom | Johns Island, SC | Installer (Tier 2) | OSWWI0346 |
| Black Diamond Construction Llc | Mount Pleasant, SC | Installer (Tier 2) | 10-367-10126 |
| Boyette Service | Wadmalaw Island, SC | Installer (Tier 2) | 10-367-10085 |
| Brown Brothers Construction Ll | Johns Island, SC | Installer (Tier 2) | 10-367-10134 |
| Buckland Developers Llc | Wadmalaw Island, SC | Installer (Tier 2) | 10-367-10084 |
| Buckland Developers, Llc. | Wadmalaw Is, SC | Pumper | OSWWP0089 |
| Bucklanddevelopers | Wadmalaw Island, SC | Pumper | OSWWP0086 |
| Capt'S Septic Tank Svc | Ravenel, SC | Pumper | 10-368-10033 |
| Carolina Restroom | Sullivans Is, SC | Pumper | OSWWP0137 |
| Cc Enterpr Of Charleston Inc | Mount Pleasant, SC | Installer (Tier 2) | 10-367-10093 |
| Coastline Builders | Johns Island, SC | Installer (Tier 2) | OSWWI0120 |
| Down South Site Services Llc | Ravenal, SC | Pumper | OSWWP0139 |
| Dump It Services | Mt Pleasant, SC | Installer (Tier 2) | 10-367-10133 |
| Earthworx Sitework & Hauling | Johns Island, SC | Installer (Tier 2) | 10-367-10125 |
| Huggins Llc Dba Rooterman | Charleston, SC | Pumper | OSWWP0181 |
| Irip Llc | Isle Of Palms, SC | Installer (Tier 2) | OSWWI0574 |
| Island Septic Systems | Wadmalaw Is, SC | Installer (Tier 2) | OSWWI0117 |
| Islands Septic Systems | Wadmalaw Is, SC | Pumper | 10-368-10026 |
| Jw Construction Group | Hollywood, SC | Pumper | OSWWP0108 |
| Key South Construction | Johns Island, SC | Installer (Tier 2) | 10-367-10104 |
| Knotts Contracting, Llc. | Mcclellanville, SC | Installer (Tier 2) | 10-367-10115 |
| Low Country Grease Svc Inc | Mount Pleasant, SC | Pumper | 10-368-10050 |
| M & R Trucking & Hauling Llc | Hollywood, SC | Installer (Tier 2) | 10-367-10113 |
| Mark Boyer Grading | Johns Island, SC | Installer (Tier 2) | 10-367-10049 |
| Mark Boyer Grading | Johns Is, SC | Installer (Tier 2) | OSWWI0731 |
| Mcgraw Event Pros, Llc | N Charleston, SC | Pumper | OSWWP0120 |
| Meeks Construction | Meggett, SC | Installer (Tier 2) | 10-367-10056 |
| Mr. Handyman Of Charleston And Summerville | Summerville, SC | Installer (Tier 2) | 18-367-18054 |
| Nature'S Calling | North Charleston, SC | Pumper | 10-368-10020 |
| Palmetto Portable Toilets Llc | Mount Pleasant, SC | Pumper | OSWWP0159 |
| Preferred Home Services | N. Charleston, SC | Installer (Tier 2) | OSWWI0775 |
| Preferred Home Services | N. Charleston, SC | Pumper | OSWWP0175 |
| Prosser Engineering & Development, Llc | Charleston, SC | Installer (Tier 2) | OSWWI0806 |
| Rigel Jessson | Mcclellanvle, SC | Installer (Tier 2) | OSWWI0103 |
| Rooterman | Charleston, SC | Pumper | OSWWP0182 |
| S & C Landworks Llc | Johns Island, SC | Installer (Tier 2) | OSWWI0187 |
| Sc Sanitation Co | N Charleston, SC | Pumper | OSWWP0032 |
| Septic Shark Llc | Charleston, SC | Installer (Tier 2) | OSWWI0816 |
| Septic Shark Llc | Charleston, SC | Pumper | OSWWP0186 |
| Sevgru Llc | Mount Pleasant, SC | Installer (Tier 2) | OSWWI0499 |
| Shoreline Custom Homes Llc | Mt Pleasant, SC | Installer (Tier 2) | OSWWI0440 |
| Southeastern Land Development, Llc | Hollywood, SC | Installer (Tier 2) | 10-367-10129 |
| T.B. Maintenance | Johns Island, SC | Installer (Tier 2) | 10-367-10130 |
| The Dung Beetle Llc | Edisto Island, SC | Installer (Tier 2) | OSWWI0572 |
| The Dung Beetle Llc | Edisto Island, SC | Pumper | OSWWP0158 |
| Thornley'S Service Inc. Dba Roto-Rooter | Johns Island, SC | Pumper | 10-368-10041 |
| W Frazier Const Inc | Ravenel, SC | Installer (Tier 2) | 10-367-10102 |
| Zackary Akinjobi | Awendaw, SC | Installer (Tier 2) | OSWWI0322 |
51 companies in the SCDES on-site wastewater (OSWW) contractor registry are based in Charleston County as of 2026-07-23. Companies based elsewhere in South Carolina also commonly serve the county.
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