Delaware Water Quality Ratings

TapWaterSafety has rated 4 public water systems in Delaware, serving a combined 521,002 residents. The statewide average grade is F.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
F
58/100
Total utilities rated 4
Population served 521,002

Top water quality concerns in Delaware

  • PFAS contamination
  • Total trihalomethanes (TTHMs) significantly above health guideline
  • Haloacetic acids (HAA9) significantly above health guideline
  • Perfluorohexane sulfonate (PFHXS) significantly above health guideline
  • Haloacetic acids (HAA5) significantly above health guideline

Cities in Delaware

Browse tap water quality reports by city. Click any city to see its grade, what's in the water, and recommended filters.

BEAR
F 231,114
HOCKESSIN
F 231,114
NEW CASTLE
F 100,495
REHOBOTH BEACH
D 81,417
WILMINGTON
F 208,471

Grade distribution

A
0 (0%)
B
0 (0%)
C
0 (0%)
D
3 (75%)
F
1 (25%)

All rated utilities in Delaware

Sorted by score, highest first. Click any utility to see the full grade card.

Rank Utility City Population Score Grade
#1 REHOBOTH PUMP DISTRICT (TUI) REHOBOTH BEACH 81,417 64 D
#2 WILMINGTON WATER DEPARTMENT WILMINGTON 107,976 59 D
#3 ARTESIAN WATER COMPANY BEAR 231,114 55 D
#4 VEOLIA WATER DELAWARE, INC NEW CASTLE 100,495 52 F