City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4153
Manchester
County, MI
92 A
#4154 Mandeville
County, LA
92 A
#4155 Manhattan
County, IL
92 A
#4156 Mansfield
County, MA
92 A
#4157 Manson
County, WA
92 A
#4158 Marcus
County, IA
92 A
#4159 Marengo
County, IL
92 A
#4160 Marietta
County, OH
92 A
#4161 Marion
County, IA
92 A
#4162 Marion
County, OH
92 A
#4163 Marshall
County, WI
92 A
#4164 Marysville
County, OH
92 A
#4165 May City
County, IA
92 A
#4166 Mc Dougal
County, AR
92 A
#4167 Mcdavid
County, FL
92 A
#4168 Mcloud
County, OK
92 A
#4169 Mehoopany
County, PA
92 A
#4170 Melvindale
County, MI
92 A
#4171 Mer Rouge
County, LA
92 A
#4172 Meriden
County, KS
92 A
#4173 Michigan City
County, MS
92 A
#4174 Millcreek
County, UT
92 A
#4175 Millfield
County, OH
92 A
#4176 Millis
County, MA
92 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.