City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9937
Tunkhannock
County, PA
48 D
#9938 Virginia
County, IL
48 D
#9939 Wurtland
County, KY
48 D
#9940 Afton
County, OK
47 D
#9941 Angleton
County, TX
47 D
#9942 Campbell
County, MO
47 D
#9943 Clarkton
County, MO
47 D
#9944 Cleveland
County, OK
47 D
#9945 Clinton
County, UT
47 D
#9946 Colton
County, OR
47 D
#9947 Crane
County, MO
47 D
#9948 East Prairie
County, MO
47 D
#9949 Edison
County, NJ
47 D
#9950 Estes Park
County, CO
47 D
#9951 Ferris
County, TX
47 D
#9952 Fort Hancock
County, TX
47 D
#9953 Freemont
County, NC
47 D
#9954 Glenbrook
County, NV
47 D
#9955 Hamilton
County, AL
47 D
#9956 Havre
County, MT
47 D
#9957 Herkimer
County, NY
47 D
#9958 Homer
County, MI
47 D
#9959 Iselin
County, NJ
47 D
#9960 Jamestown
County, RI
47 D
Frequently Asked Questions
How are city water quality rankings calculated?
WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.
Can I compare two US cities directly?
Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.
How often does WaterQ refresh city data?
City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.