City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5161
Nyssa
County, OR
89 B
#5162 Oakdale
County, CA
89 B
#5163 Okemos
County, MI
89 B
#5164 Olmsted Twp
County, OH
89 B
#5165 Osage City
County, KS
89 B
#5166 Palmerton
County, PA
89 B
#5167 Paragould
County, AR
89 B
#5168 Parker
County, CO
89 B
#5169 Peculiar
County, MO
89 B
#5170 Philadelphia
County, MS
89 B
#5171 Piketon
County, OH
89 B
#5172 Pittsburg
County, KS
89 B
#5173 Placerville
County, CA
89 B
#5174 Plainfield
County, IL
89 B
#5175 Plymouth
County, CA
89 B
#5176 Port Allegany
County, PA
89 B
#5177 Pottstown
County, PA
89 B
#5178 Prince George
County, VA
89 B
#5179 Quincy
County, IL
89 B
#5180 Rangely
County, CO
89 B
#5181 Reading
County, MA
89 B
#5182 Richland
County, GA
89 B
#5183 Richlandtown
County, PA
89 B
#5184 Rickman
County, TN
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.