City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6457
Holton
County, IN
84 B
#6458 Hormiguero
County, PR
84 B
#6459 Hoxie
County, AR
84 B
#6460 Hudson
County, CO
84 B
#6461 Hudson
County, NY
84 B
#6462 Humansville
County, MO
84 B
#6463 Hyannis
County, MA
84 B
#6464 Independence
County, LA
84 B
#6465 Island Pond
County, VT
84 B
#6466 Itasca
County, TX
84 B
#6467 Jemez Pueblo
County, NM
84 B
#6468 Kaplan
County, LA
84 B
#6469 Kasson
County, MN
84 B
#6470 Kearny
County, NJ
84 B
#6471 Ketchum
County, OK
84 B
#6472 King
County, WI
84 B
#6473 Kirtland
County, NM
84 B
#6474 Knob Noster
County, MO
84 B
#6475 Ladysmith
County, WI
84 B
#6476 Lagrange
County, NC
84 B
#6477 Lake Havasu City
County, AZ
84 B
#6478 Lakefield
County, MN
84 B
#6479 Laurel
County, MS
84 B
#6480 Lavonia,
County, GA
84 B
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.