City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11017
Campti
County, LA
0 F
#11018 Caney
County, KS
0 F
#11019 Canoncito
County, NM
0 F
#11020 Carrizozo
County, NM
0 F
#11021 Carthage
County, TX
0 F
#11022 Casa
County, AR
0 F
#11023 Castor
County, LA
0 F
#11024 Cedar Lake
County, IN
0 F
#11025 Centerfield
County, UT
0 F
#11026 Centerport
County, NY
0 F
#11027 Chama
County, NM
0 F
#11028 Chandler
County, OK
0 F
#11029 Chapel Hill
County, NC
0 F
#11030 Chapmanville
County, WV
0 F
#11031 Chariton
County, IA
0 F
#11032 Chatham
County, LA
0 F
#11033 Chattanooga
County, OK
0 F
#11034 Checotah
County, OK
0 F
#11035 Chenoa
County, IL
0 F
#11036 Cheraw
County, SC
0 F
#11037 Chester
County, TX
0 F
#11038 Chickasha
County, OK
0 F
#11039 Childress
County, TX
0 F
#11040 Choudrant
County, LA
0 F
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.