City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#7297
Lexington
County, TX
80 B
#7298 Liberty
County, SC
80 B
#7299 Liberty Hill
County, TX
80 B
#7300 Lindsay
County, OK
80 B
#7301 Linn Valley
County, KS
80 B
#7302 Little River Academy
County, TX
80 B
#7303 Loogootee
County, IN
80 B
#7304 Lorman
County, MS
80 B
#7305 Los Angeles
County, CA
80 B
#7306 Louisa
County, KY
80 B
#7307 Louisville
County, IL
80 B
#7308 Lunenburg
County, MA
80 B
#7309 Mahomet
County, IL
80 B
#7310 Mayaguez
County, PR
80 B
#7311 Melbourne
County, AR
80 B
#7312 Melissa
County, TX
80 B
#7313 Mifflintown
County, PA
80 B
#7314 Milford
County, PA
80 B
#7315 Milton
County, VT
80 B
#7316 Minco
County, OK
80 B
#7317 Minden
County, NV
80 B
#7318 Mineral Springs
County, AR
80 B
#7319 Monroe
County, MI
80 B
#7320 Monticello
County, IL
80 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.