South Carolina drinking water quality
South Carolina has 1,406 active public water systems serving 4.9 million people. 313 of them, 22%, had at least one EPA violation in the past three years, 128 have an unresolved violation today, and 2 are designated serious violators by the EPA.
Active systems
1,406
in 46 counties
People served
4.9M
559 community systems serve 4.8M
Violations, past 3 years
313
22% of active systems
Serious violators
2
4 systems carry a health flag
Largest counties
All 46 counties| County | People served | Systems | With violations |
|---|---|---|---|
| Greenville | 528,724 | 47 | 8 |
| Charleston | 431,366 | 73 | 12 |
| Horry | 424,440 | 51 | 9 |
| Richland | 396,379 | 79 | 15 |
| Spartanburg | 354,847 | 30 | 1 |
| Beaufort | 223,034 | 47 | 6 |
| York | 212,698 | 144 | 36 |
| Anderson | 206,261 | 40 | 9 |
| Lexington | 187,797 | 132 | 30 |
| Dorchester | 165,538 | 54 | 5 |
Largest community water systems
All 1,406 systems| System | Serves | Status |
|---|---|---|
| Greenville Water (sc2310001) Greenville County |
426,057 | |
| Columbia City of (sc4010001) Richland County |
354,068 | |
| Charleston Water System (sc1010001) Charleston County |
278,771 | |
| Grand Strand W&sa/bull Creek Horry County |
252,840 | |
| Spartanburg Water System (sc4210001) Spartanburg County |
166,364 | |
| Bjw&sa (sc0720003) Beaufort County |
164,829 | |
| Bcwsa Sangaree W/d (0820002) Berkeley County |
95,345 | |
| MT Pleasant Waterworks (sc1010002) Charleston County |
91,500 | |
| Rock Hill City of (sc4610002) York County |
89,850 | |
| Sjwd Middle Tyger Wtp (sc4220006) Spartanburg County |
89,531 |
About the South Carolina data
Retrieved from EPA ECHO on Oct 11, 2026.