City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#7969
Lake Hallie
County, WI
76 B
#7970 Las Animas
County, CO
76 B
#7971 Lavon
County, TX
76 B
#7972 Leighton
County, AL
76 B
#7973 Liberty
County, TX
76 B
#7974 Libertyville
County, IL
76 B
#7975 Littleton
County, MA
76 B
#7976 Lockney
County, TX
76 B
#7977 Lucasville
County, OH
76 B
#7978 Lyerly
County, GA
76 B
#7979 Mangonia Park
County, FL
76 B
#7980 Manor
County, TX
76 B
#7981 Mansquan
County, NJ
76 B
#7982 Maricopa
County, AZ
76 B
#7983 Marion
County, AR
76 B
#7984 Mason City
County, IA
76 B
#7985 Mathiston
County, MS
76 B
#7986 Mattoon
County, IL
76 B
#7987 Medfield
County, MA
76 B
#7988 Medway
County, MA
76 B
#7989 Meeker
County, OK
76 B
#7990 Mendon
County, UT
76 B
#7991 Merrimac
County, MA
76 B
#7992 Midwest City
County, OK
76 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.