City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9817
Labelle
County, FL
50 D
#9818 Laguna
County, NM
50 D
#9819 Lake Ozark
County, MO
50 D
#9820 Lexington
County, MS
50 D
#9821 Libby
County, MT
50 D
#9822 London
County, KY
50 D
#9823 Lone Star
County, TX
50 D
#9824 Lytle
County, TX
50 D
#9825 Macungie
County, PA
50 D
#9826 Marion
County, IL
50 D
#9827 Mediapolis
County, IA
50 D
#9828 Memphis
County, MO
50 D
#9829 Milton
County, WV
50 D
#9830 Montclair
County, CA
50 D
#9831 Mt Carroll
County, IL
50 D
#9832 Murchison
County, TX
50 D
#9833 North Kingstown
County, RI
50 D
#9834 Northampton
County, MA
50 D
#9835 Nowata
County, OK
50 D
#9836 Patterson
County, LA
50 D
#9837 Pinckneyville
County, IL
50 D
#9838 Port Arthur
County, TX
50 D
#9839 Randolph
County, MS
50 D
#9840 Ringgold
County, LA
50 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.