City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9721
Natchez
County, LA
52 D
#9722 Norwalk
County, IA
52 D
#9723 Orbisonia
County, PA
52 D
#9724 Orwigsburg
County, PA
52 D
#9725 Otego
County, NY
52 D
#9726 Plymouth
County, MA
52 D
#9727 Porter
County, TX
52 D
#9728 Rhome
County, TX
52 D
#9729 Roseland
County, LA
52 D
#9730 Russell
County, MA
52 D
#9731 Russell Springs
County, KY
52 D
#9732 Rutland
County, OH
52 D
#9733 San Lorenzo
County, PR
52 D
#9734 Santa Clara
County, NM
52 D
#9735 Sebastian
County, TX
52 D
#9736 Selma
County, AL
52 D
#9737 Shepherd
County, TX
52 D
#9738 Snow Shoe
County, PA
52 D
#9739 Sopchoppy
County, FL
52 D
#9740 South Royalton
County, VT
52 D
#9741 Stratford
County, OK
52 D
#9742 Stuart
County, FL
52 D
#9743 Yardville
County, NJ
52 D
#9744 Youngsville
County, NC
52 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.