City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1945
West Salem
County, WI
98 A
#1946 West Union
County, IA
98 A
#1947 Westlake
County, FL
98 A
#1948 Westlake Village
County, CA
98 A
#1949 Whitehouse
County, OH
98 A
#1950 Whitney Point
County, NY
98 A
#1951 Wildomar
County, CA
98 A
#1952 Willamina
County, OR
98 A
#1953 Williamsburg
County, VA
98 A
#1954 Wimberley
County, TX
98 A
#1955 Windcrest
County, TX
98 A
#1956 Windham
County, NH
98 A
#1957 Windom
County, MN
98 A
#1958 Winnebago
County, MN
98 A
#1959 Woodland
County, CA
98 A
#1960 Worland
County, WY
98 A
#1961 Worthington
County, MN
98 A
#1962 Wright
County, WY
98 A
#1963 Wrightsville
County, GA
98 A
#1964 Wymore
County, NE
98 A
#1965 Wynne
County, AR
98 A
#1966 Yardley
County, PA
98 A
#1967 Yellowstone National Park
County, WY
98 A
#1968 Yoakum
County, TX
98 A
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.