County Water Quality Report

Charleston County, South Carolina

2 public water systems serving 418,922 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
F
55/100
Utilities rated 2
Population served 418,922

Top water quality concerns in Charleston County

  • PFAS contaminationin 2 of 2 utilities
  • Haloacetic acids (HAA9) significantly above health guidelinein 2 of 2 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 2 of 2 utilities
  • Dibromoacetic acid significantly above health guidelinein 1 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 1 of 2 utilities

All utilities in Charleston County

Click any utility for full grade card, contaminant data, and treatment plant contact info.

D
55/100

CHARLESTON WATER SYSTEM (SC1010001)

CHARLESTON · 327,422 residents

Top concern: PFAS contamination

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D
55/100

MT PLEASANT WATER WORKS (1010002)

MOUNT PLEASANT · 91,500 residents

Top concern: PFAS contamination

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