Kentucky Water Quality Ratings

TapWaterSafety has rated 11 public water systems in Kentucky, serving a combined 3,046,582 residents. The statewide average grade is D.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
D
64/100
Total utilities rated 11
Population served 3,046,582
Most recent test 2024
🇪🇺 Would fail EU standards 2 of 11

Top water quality concerns in Kentucky

  • Haloacetic acids (HAA9) significantly above health guideline
  • Total trihalomethanes (TTHMs) significantly above health guideline
  • Haloacetic acids (HAA5) significantly above health guideline
  • PFAS contamination
  • Lead detected in source water

Cities in Kentucky

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

BOWLING GREEN
D 144,719
BURLINGTON
C 66,300
ELIZABETHTOWN
F 76,326
FT. THOMAS
C 259,949
LEXINGTON
F 669,042
LOUISVILLE
D 764,769
Lexington
D 323,000
Louisville
D 617,000
OWENSBORO
F 60,473
PADUCAH
F 65,004

Grade distribution

A
0 (0%)
B
2 (18%)
C
4 (36%)
D
3 (27%)
F
2 (18%)

All rated utilities in Kentucky

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

Rank Utility City Population Score Grade
#1 BOONE CO WATER & SEWER DISTRICT BURLINGTON 66,300 78 B
#2 NORTHERN KENTUCKY WATER DISTRICT FT. THOMAS 259,949 78 B
#3 BOWLING GREEN MUNICIPAL UTILITIES BOWLING GREEN 53,601 70 C
#4 WARREN COUNTY WATER DISTRICT BOWLING GREEN 91,118 68 C
#5 Lexington Water Utilities Lexington 323,000 67 C
#6 City of Louisville Water Department Louisville 617,000 67 C
#7 LOUISVILLE WATER COMPANY LOUISVILLE 764,769 62 D
#8 KENTUCKY-AMERICAN WATER CO LEXINGTON 669,042 57 D
#9 PADUCAH WATER WORKS PADUCAH 65,004 57 D
#10 HARDIN COUNTY WATER DISTRICT #2 ELIZABETHTOWN 76,326 53 F
#11 OWENSBORO MUNICIPAL UTILITIES OWENSBORO 60,473 49 F