City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6385
Colfax
County, WI
84 B
#6386 Colmesneil
County, TX
84 B
#6387 Copperhill
County, TN
84 B
#6388 Corning
County, NY
84 B
#6389 Corning
County, OH
84 B
#6390 Cortland
County, NY
84 B
#6391 Cotter
County, AR
84 B
#6392 Council Grove
County, KS
84 B
#6393 Cranberry Twp
County, PA
84 B
#6394 Crivitz
County, WI
84 B
#6395 Crosby
County, ND
84 B
#6396 Croswell
County, MI
84 B
#6397 Cynthiana
County, KY
84 B
#6398 Dale
County, IN
84 B
#6399 Dansville
County, NY
84 B
#6400 Dedham
County, MA
84 B
#6401 Demotte
County, IN
84 B
#6402 Destin
County, FL
84 B
#6403 Dewey
County, AZ
84 B
#6404 Dixfield
County, ME
84 B
#6405 Douglas
County, MA
84 B
#6406 Downers Grove
County, IL
84 B
#6407 Dracut
County, MA
84 B
#6408 Dundee
County, OR
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.