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.