County · South Carolina
Charleston County, South Carolina: drinking water records
This overview covers 26 ZIP codes and 16 community water systems in Charleston County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Charleston Water System (Sc1010001) SC1010001 | 327,422 | 120 | 5 | 0 | 3.5 ppb |
| Mt Pleasant Water Works (1010002) SC1010002 | 91,500 | 360 | 6 | 0 | 1.1 ppb |
| St John'S Water (Sc1020002) SC1020002 | 22,592 | 119 | 5 | 0 | 2 ppb |
| Kiawah Island Utility (Sc1010008) SC1010008 | 9,550 | 120 | 6 | 0 | 1.1 ppb |
| Isle of Palms W/S Comm (Sc1010004) SC1010004 | 9,530 | 180 | 7 | 0 | 0.5 ppb |
| Seabrook Island Town of (1010009) SC1010009 | 5,939 | 120 | 5 | 0 | 4 ppb |
| Folly Beach City of (1010005) SC1010005 | 5,086 | 120 | 7 | 0 | 0.9 ppb |
| Burbage MHP (Sc1060063) SC1060063 | 171 | 0 | 0 | 1 | 0 ppb |
| Wa Burbage Trailer Park 1 (1060014) SC1060014 | 81 | 0 | 0 | 1 | 1.4 ppb |
| Dewees Utilities (Sc1050011) SC1050011 | 55 | 0 | 0 | 9 | 8 ppb |
| Windwood Farm Home (Sc1070963) SC1070963 | 33 | 0 | 0 | 1 | 0.2 ppb |
| Sullivans Island Town of (1010003) SC1010003 | 2,521 | 0 | 0 | 0 | 0.6 ppb |
| Lincolnville Town of (Sc1010007) SC1010007 | 1,980 | 0 | 0 | 0 | 0.1 ppb |
| Awendaw Town of (Sc1010504) SC1010504 | 713 | 0 | 0 | 0 | 2.3 ppb |
| Jericho Trailer Park (1060061) SC1060061 | 103 | 0 | 0 | 0 | 0.2 ppb |
| Twin Oaks Mobile Home Park VA5019865 | 50 | 0 | 0 | 0 | 2.8 ppb |
ZIP reports in Charleston County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.