City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11257
Lexington
County, MN
0 F
#11258 Ligonier
County, PA
0 F
#11259 Lincoln Park
County, NJ
0 F
#11260 Lindsay
County, CA
0 F
#11261 Lisman
County, AL
0 F
#11262 Litchfield
County, IL
0 F
#11263 Lock Haven
County, PA
0 F
#11264 Logansport
County, LA
0 F
#11265 Loleta
County, CA
0 F
#11266 Lordsburg
County, NM
0 F
#11267 Louisiana
County, MO
0 F
#11268 Louisville
County, KY
0 F
#11269 Loving
County, NM
0 F
#11270 Lovingston
County, VA
0 F
#11271 Lumberport
County, WV
0 F
#11272 Lykens
County, PA
0 F
#11273 Madill
County, OK
0 F
#11274 Madison
County, VA
0 F
#11275 Madison
County, NH
0 F
#11276 Mammoth
County, AZ
0 F
#11277 Mamou
County, LA
0 F
#11278 Mansfield
County, AR
0 F
#11279 Manson
County, IA
0 F
#11280 Maple Park
County, IL
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.