County Water Quality Report

Suffolk County, New York

2 public water systems serving 1,181,760 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
61/100
Utilities rated 2
Population served 1,181,760

Top water quality concerns in Suffolk County

  • PFAS contaminationin 2 of 2 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 1 of 2 utilities
  • Nitrate and nitrite significantly above health guidelinein 1 of 2 utilities
  • Chromium (hexavalent) significantly above health guidelinein 1 of 2 utilities
  • Perfluorohexane sulfonate (PFHXS) significantly above health guidelinein 1 of 2 utilities

All utilities in Suffolk County

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

D
62/100

SUFFOLK COUNTY WATER AUTHORITY

SMITHTOWN (T) · 1,100,000 residents

Top concern: PFAS contamination

View report →
D
60/100

SOUTH HUNTINGTON WATER DISTRICT

HUNTINGTON (T) · 81,760 residents

Top concern: PFAS contamination

View report →