City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6601
Villa Park
County, IL
84 B
#6602 Walpole
County, NH
84 B
#6603 Wapello
County, IA
84 B
#6604 Warren
County, PA
84 B
#6605 Warsaw
County, MO
84 B
#6606 Warsaw
County, NC
84 B
#6607 Warwick
County, RI
84 B
#6608 Washington
County, IA
84 B
#6609 Waterloo
County, IA
84 B
#6610 Waterloo
County, WI
84 B
#6611 Watertown
County, MN
84 B
#6612 Waunakee
County, WI
84 B
#6613 Waupaca
County, WI
84 B
#6614 Waverly
County, OH
84 B
#6615 Waynesville
County, OH
84 B
#6616 Welcome
County, NC
84 B
#6617 Wellborn
County, TX
84 B
#6618 West Liberty
County, OH
84 B
#6619 West Melbourne
County, FL
84 B
#6620 West Sacramento
County, CA
84 B
#6621 Westmont
County, IL
84 B
#6622 Wheeler
County, MS
84 B
#6623 Wheeling
County, IL
84 B
#6624 Whiteville
County, NC
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.