21 South Carolina water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Greenville Water (2310001)396,265 people · 10 results
- Columbia City of (Sc4010001)319,500 people · 22 results
- Gsw&Sa (Sc2620004)247,550 people · 14 results
- Bjw&Sa (0720003)145,634 people · 13 results
- Spartanburg Water System (4210001)140,024 people · 11 results
- Bcwsa Sangaree W/D (0820002)95,345 people · 16 results
- Rock Hill City of (Sc4610002)82,846 people · 15 results
- Florence City of (Sc2110001)74,204 people · 9 results
- Greer Cpw (Sc2310005)53,602 people · 3 results
- Sumter City of (Sc4310001)53,070 people · 11 results
- N Myrtle Beach City of (Sc2610011)40,625 people · 13 results
- Electric City Utilities (Sc0410012)38,204 people · 9 results
- Seneca City of (3710002)37,478 people · 9 results
- Laurens County W&S Comm (Sc3020001)36,314 people · 13 results
- York County East WD (Sc4620002)30,225 people · 13 results
- Hilton Head Psd 1 (0720006)25,558 people · 12 results
- Gaffney Bpw (1110001)24,290 people · 2 results
- Hammond W/D (Sc0420007)21,193 people · 9 results
- Fort Mill Town of (Sc4610003)20,783 people · 12 results
- Walhalla City of (Sc3710004)18,511 people · 6 results
- Breezy Hill W/D (Sc0220006)17,822 people · 1 results