City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6697
Johnston
County, IA
83 B
#6698 Kankakee
County, IL
83 B
#6699 Keithville
County, LA
83 B
#6700 Kensett
County, AR
83 B
#6701 Kentland
County, IN
83 B
#6702 Lakeside
County, CA
83 B
#6703 Larned
County, KS
83 B
#6704 Lathrop
County, MO
83 B
#6705 Lebanon
County, TN
83 B
#6706 Licking
County, MO
83 B
#6707 Lloyd
County, FL
83 B
#6708 Long Valley
County, NJ
83 B
#6709 Madison
County, IN
83 B
#6710 Madison
County, WI
83 B
#6711 Marietta
County, SC
83 B
#6712 Martinsburg
County, WV
83 B
#6713 Martinsville
County, IN
83 B
#6714 Mayfield
County, KY
83 B
#6715 Middleton
County, WI
83 B
#6716 Mifflinburg
County, PA
83 B
#6717 Milton
County, PA
83 B
#6718 Montgomery
County, NY
83 B
#6719 Monticello
County, GA
83 B
#6720 Montpelier
County, ID
83 B
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.