WaterQ

City Water Quality Rankings

11,696 cities ranked by drinking water quality.

Popular city water quality comparisons

Trending Cities

#8617
Groves
County, TX
71 C
#8618
Hagerstown
County, MD
71 C
#8619
Hamilton
County, MA
71 C
#8620
Hamilton
County, NJ
71 C
#8621
Hansen
County, ID
71 C
#8622
Harrington
County, DE
71 C
#8623
Houlka
County, MS
71 C
#8624
Hurricane
County, UT
71 C
#8625
Jackson
County, MS
71 C
#8626
Jacksonville
County, FL
71 C
#8627
Jamestown
County, NC
71 C
#8628
Jayess
County, MS
71 C
#8629
Jena
County, LA
71 C
#8630
Kenilworth
County, IL
71 C
#8631
Lancaster
County, KY
71 C
#8632
Lawrenceville
County, NJ
71 C
#8633
Lincolonwood
County, IL
71 C
#8634
Lithopolis
County, OH
71 C
#8635
Louisville
County, CO
71 C
#8636
Madrid
County, IA
71 C
#8637
Marthasville
County, MO
71 C
#8638
Mechanicsville
County, IA
71 C
#8639
Melrose
County, MA
71 C
#8640
Millersville
County, MO
71 C

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.

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