City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10033
Dundee
County, NY
45 D
#10034 Edinboro
County, PA
45 D
#10035 Elkville
County, IL
45 D
#10036 Fellsmere
County, FL
45 D
#10037 Franklinville
County, NJ
45 D
#10038 Garnett
County, KS
45 D
#10039 Grayville
County, IL
45 D
#10040 Green Cove Springs
County, FL
45 D
#10041 Homestead,
County, FL
45 D
#10042 Hopewell
County, NJ
45 D
#10043 Ithaca
County, MI
45 D
#10044 Kerrville
County, TX
45 D
#10045 Louisville
County, AL
45 D
#10046 Maple Glen
County, PA
45 D
#10047 Milford
County, IL
45 D
#10048 Mountain Green
County, UT
45 D
#10049 Mt. Morris
County, IL
45 D
#10050 Norristown
County, PA
45 D
#10051 Petersburg
County, TX
45 D
#10052 Pine Prairie
County, LA
45 D
#10053 Plantation
County, FL
45 D
#10054 Prairie Grove
County, AR
45 D
#10055 Rio Grande City
County, TX
45 D
#10056 Shreveport
County, LA
45 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.