City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6577
Skokomish Nation
County, WA
84 B
#6578 Smithton
County, IL
84 B
#6579 Smithville
County, MO
84 B
#6580 South Daytona
County, FL
84 B
#6581 Southborough
County, MA
84 B
#6582 Southwest Harbor
County, ME
84 B
#6583 Spring Valley
County, IL
84 B
#6584 St Charles
County, MO
84 B
#6585 St. Helena
County, CA
84 B
#6586 Stanton
County, MI
84 B
#6587 Stewartville
County, MN
84 B
#6588 Stillman Valley
County, IL
84 B
#6589 Stonewood
County, WV
84 B
#6590 Summit
County, MS
84 B
#6591 Swanton
County, VT
84 B
#6592 Syracuse
County, UT
84 B
#6593 Tahoe City
County, CA
84 B
#6594 Thompsonville
County, IL
84 B
#6595 Thorndike
County, MA
84 B
#6596 Tiplersville
County, MS
84 B
#6597 Tobyhanna
County, PA
84 B
#6598 Tuscarawas
County, OH
84 B
#6599 Unity
County, ME
84 B
#6600 Valatie
County, NY
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.