County Water Quality Report

Fairfield County, Connecticut

4 public water systems serving 586,322 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 4
Population served 586,322

Top water quality concerns in Fairfield County

  • Haloacetic acids (HAA9) significantly above health guidelinein 4 of 4 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 4 of 4 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 3 of 4 utilities
  • PFAS contaminationin 1 of 4 utilities
  • Arsenic significantly above health guidelinein 1 of 4 utilities

All utilities in Fairfield County

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

C
67/100

DANBURY WATER DEPARTMENT

BETHEL · 62,055 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

View report →
D
63/100

AQUARION-GREENWICH

GREENWICH · 53,297 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

View report →
D
63/100

AQUARION-STAMFORD

DARIEN · 119,214 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

View report →
F
51/100

AQUARION-EASTERN FAIRFIELD COUNTY

BEACON FALLS · 351,756 residents

Top concern: PFAS contamination

View report →