City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6361
Canyon
County, TX
84 B
#6362 Carlyle
County, IL
84 B
#6363 Carriere
County, MS
84 B
#6364 Carrollton
County, KY
84 B
#6365 Castroville
County, TX
84 B
#6366 Cave City
County, KY
84 B
#6367 Cedar Grove
County, TN
84 B
#6368 Center
County, CO
84 B
#6369 Central City
County, KY
84 B
#6370 Centreville
County, MD
84 B
#6371 Chambersburg
County, PA
84 B
#6372 Chandler Heights
County, AZ
84 B
#6373 Charlestown
County, NH
84 B
#6374 Chatfield
County, MN
84 B
#6375 Chatham
County, MA
84 B
#6376 Chelan
County, WA
84 B
#6377 Chester
County, WV
84 B
#6378 Chicago Ridge
County, IL
84 B
#6379 Churubusco
County, IN
84 B
#6380 Cidra
County, PR
84 B
#6381 Claremont
County, NH
84 B
#6382 Claxton
County, GA
84 B
#6383 Clintwood
County, VA
84 B
#6384 Coaling
County, AL
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.