City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9553
Glen Rose
County, TX
55 D
#9554 Harleton
County, TX
55 D
#9555 Harrisonburg
County, LA
55 D
#9556 Haskell
County, TX
55 D
#9557 Jonesboro
County, IL
55 D
#9558 Lake Mary
County, FL
55 D
#9559 Libertyville
County, IL
55 D
#9560 Longwood
County, FL
55 D
#9561 Macomb
County, IL
55 D
#9562 Marked Tree
County, AR
55 D
#9563 Marshall
County, TX
55 D
#9564 Marshalltown
County, IA
55 D
#9565 Mesilla
County, NM
55 D
#9566 Midland
County, TX
55 D
#9567 New Blaine
County, AR
55 D
#9568 Paducah
County, TX
55 D
#9569 Patton
County, PA
55 D
#9570 Pine Valley
County, CA
55 D
#9571 River Rouge
County, MI
55 D
#9572 Sidney
County, IA
55 D
#9573 Snowflake
County, AZ
55 D
#9574 Spanish Fort
County, AL
55 D
#9575 St. Charles
County, IL
55 D
#9576 Standish
County, MI
55 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.