City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9865
Warsaw
County, IL
56 D
#9866 Webbers Falls
County, OK
56 D
#9867 Welaka
County, FL
56 D
#9868 Wesson
County, MS
56 D
#9869 Westmont
County, NJ
56 D
#9870 White Sands Missile Range
County, NM
56 D
#9871 Whitewater
County, KS
56 D
#9872 Yachats
County, OR
56 D
#9873 Yancey
County, TX
56 D
#9874 Attleboro
County, MA
55 D
#9875 Brigantine
County, NJ
55 D
#9876 Brownsville
County, OR
55 D
#9877 Caguas
County, PR
55 D
#9878 Camden
County, AR
55 D
#9879 Charleroi
County, PA
55 D
#9880 Dawson
County, IL
55 D
#9881 Deweyville
County, TX
55 D
#9882 Duquoin
County, IL
55 D
#9883 Glenwood
County, NJ
55 D
#9884 Jensen Beach
County, FL
55 D
#9885 Lake Mary
County, FL
55 D
#9886 Lanai City
County, HI
55 D
#9887 Madison
County, NJ
55 D
#9888 Marshalltown
County, IA
55 D
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.