City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9025
Jefferson
County, NC
67 C
#9026 Josephine
County, TX
67 C
#9027 Kanab
County, UT
67 C
#9028 Kaneohe Bay
County, HI
67 C
#9029 Kentwood
County, LA
67 C
#9030 Keyser
County, WV
67 C
#9031 Kingston
County, IL
67 C
#9032 Kykotsmovi
County, AZ
67 C
#9033 Lake Bluff
County, IL
67 C
#9034 Lasalle
County, CO
67 C
#9035 Little Chute
County, WI
67 C
#9036 Lucedale
County, MS
67 C
#9037 Mahwah
County, NJ
67 C
#9038 Malta
County, IL
67 C
#9039 Mannford
County, OK
67 C
#9040 Marion
County, MS
67 C
#9041 Medford
County, MA
67 C
#9042 Mocksville
County, NC
67 C
#9043 Montague
County, TX
67 C
#9044 Mooreville
County, MS
67 C
#9045 Morovis
County, PR
67 C
#9046 Mount Vernon
County, IN
67 C
#9047 Mt Olive
County, MS
67 C
#9048 Naches
County, WA
67 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.