City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11209
Idalou
County, TX
0 F
#11210 Ider
County, AL
0 F
#11211 Indian Head
County, PA
0 F
#11212 Indianola
County, OK
0 F
#11213 Inver Grove Heights
County, MN
0 F
#11214 Inverness
County, FL
0 F
#11215 Iota
County, LA
0 F
#11216 Jackson
County, WY
0 F
#11217 Jber
County, AK
0 F
#11218 Jefferson
County, WI
0 F
#11219 Jellico
County, TN
0 F
#11220 Jemez Springs
County, NM
0 F
#11221 Johnsonburg
County, PA
0 F
#11222 Junction
County, TX
0 F
#11223 Juneau
County, AK
0 F
#11224 Keams Canyon
County, AZ
0 F
#11225 Kellyville
County, OK
0 F
#11226 Kenai
County, AK
0 F
#11227 Kenly
County, NC
0 F
#11228 Kennett Square
County, PA
0 F
#11229 Ketchikan
County, AK
0 F
#11230 Kincaid
County, IL
0 F
#11231 King City
County, MO
0 F
#11232 Kingfisher
County, OK
0 F
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.