City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5185
Ridge Spring
County, SC
89 B
#5186 Rincon
County, GA
89 B
#5187 Ripon
County, WI
89 B
#5188 Rosenberg
County, TX
89 B
#5189 Roslyn
County, WA
89 B
#5190 Sandpoint
County, ID
89 B
#5191 Sarahsville
County, OH
89 B
#5192 Seal Rock
County, OR
89 B
#5193 Sellersville
County, PA
89 B
#5194 Sells
County, AZ
89 B
#5195 Seneca
County, KS
89 B
#5196 Shelton
County, CT
89 B
#5197 Sheridan
County, IL
89 B
#5198 Shoals
County, IN
89 B
#5199 Shrewsbury
County, PA
89 B
#5200 Slinger
County, WI
89 B
#5201 South Coffeyville
County, OK
89 B
#5202 Stinnett
County, TX
89 B
#5203 Strum
County, WI
89 B
#5204 Stuart
County, OK
89 B
#5205 Stuttgart
County, AR
89 B
#5206 Superior
County, CO
89 B
#5207 Tehachapi
County, CA
89 B
#5208 Thornton
County, CO
89 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.