City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6169
Boston
County, GA
85 B
#6170 Bottineau
County, ND
85 B
#6171 Boulder
County, CO
85 B
#6172 Boulder Creek
County, CA
85 B
#6173 Brodhead
County, KY
85 B
#6174 Brookfield
County, MO
85 B
#6175 Bryan
County, TX
85 B
#6176 Bushnell
County, FL
85 B
#6177 Byhalia
County, MS
85 B
#6178 Camp Lejeune
County, NC
85 B
#6179 Capac
County, MI
85 B
#6180 Caraway
County, AR
85 B
#6181 Carrollton
County, MO
85 B
#6182 Cary
County, IL
85 B
#6183 Castledale
County, UT
85 B
#6184 Cedarville
County, OH
85 B
#6185 Center Valley
County, PA
85 B
#6186 Champaign
County, IL
85 B
#6187 Chattanooga
County, TN
85 B
#6188 Clewiston
County, FL
85 B
#6189 Collins
County, NY
85 B
#6190 Cottage Grove
County, WI
85 B
#6191 Cuba
County, MO
85 B
#6192 Cuba City
County, WI
85 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.