City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8953
Lancaster
County, CA
64 C
#8954 Lantana
County, FL
64 C
#8955 Laquey
County, MO
64 C
#8956 Layton
County, UT
64 C
#8957 Lee
County, MA
64 C
#8958 Leesburg
County, NJ
64 C
#8959 Livingston
County, NJ
64 C
#8960 Loretto
County, PA
64 C
#8961 Los Lunas
County, NM
64 C
#8962 Luke Afb
County, AZ
64 C
#8963 Manchester
County, NJ
64 C
#8964 Milford
County, UT
64 C
#8965 Monticello
County, IA
64 C
#8966 Montverde
County, FL
64 C
#8967 Moscow
County, TX
64 C
#8968 Mount Vernon
County, IN
64 C
#8969 Mountain Grove
County, MO
64 C
#8970 Nantucket
County, MA
64 C
#8971 Natalia
County, TX
64 C
#8972 Newburgh
County, NY
64 C
#8973 Nickerson
County, KS
64 C
#8974 Oak Bluffs
County, MA
64 C
#8975 Orion
County, IL
64 C
#8976 Orlando
County, FL
64 C
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.