City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10081
Mangum
County, OK
51 D
#10082 Many Farms
County, AZ
51 D
#10083 Marseilles
County, IL
51 D
#10084 Milford
County, IL
51 D
#10085 Mill Creek
County, WV
51 D
#10086 Morni
County, UT
51 D
#10087 Mt Clemens
County, MI
51 D
#10088 Norlina
County, NC
51 D
#10089 Perth Amboy
County, NJ
51 D
#10090 Saluda
County, SC
51 D
#10091 Sparta
County, IL
51 D
#10092 St George
County, UT
51 D
#10093 Winona
County, TX
51 D
#10094 Adel
County, IA
50 D
#10095 Astor
County, FL
50 D
#10096 Bernardston
County, MA
50 D
#10097 Blackstone
County, VA
50 D
#10098 Bloomingdale Boro
County, NJ
50 D
#10099 Boulder City
County, NV
50 D
#10100 Bunkie
County, LA
50 D
#10101 Carbondale
County, CO
50 D
#10102 Chesterfield
County, MO
50 D
#10103 Christiana
County, PA
50 D
#10104 Cocoa
County, FL
50 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.