City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1393
Carmichael
County, CA
98 A
#1394 Castle Rock
County, WA
98 A
#1395 Cave Springs
County, AR
98 A
#1396 Celebration
County, FL
98 A
#1397 Centerville
County, GA
98 A
#1398 Centerville
County, MN
98 A
#1399 Centralia
County, WA
98 A
#1400 Charleston
County, SC
98 A
#1401 Chatham
County, VA
98 A
#1402 Cherry Point
County, NC
98 A
#1403 Chester
County, CA
98 A
#1404 Chester
County, VT
98 A
#1405 Chesterfield Township
County, MI
98 A
#1406 Chincoteague
County, VA
98 A
#1407 City Of Gainesville
County, GA
98 A
#1408 Clint
County, TX
98 A
#1409 Clinton
County, IA
98 A
#1410 Clive
County, IA
98 A
#1411 Clover
County, SC
98 A
#1412 Clyde
County, OH
98 A
#1413 Cochiti
County, NM
98 A
#1414 Coeburn
County, VA
98 A
#1415 Coeur D Alene
County, ID
98 A
#1416 Coleraine
County, MN
98 A
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.