City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5137
Laplace
County, LA
89 B
#5138 Lebanon
County, OR
89 B
#5139 Lebanon
County, VA
89 B
#5140 Lewisburg
County, OH
89 B
#5141 Liberty
County, NY
89 B
#5142 Lincolnshire
County, IL
89 B
#5143 Lombard
County, IL
89 B
#5144 Lower Brule
County, SD
89 B
#5145 Malmstrom Air Force Base
County, MT
89 B
#5146 Mansfield
County, MO
89 B
#5147 Marion
County, AL
89 B
#5148 Markle
County, IN
89 B
#5149 Marks
County, MS
89 B
#5150 Marshall
County, WA
89 B
#5151 Maryville
County, IL
89 B
#5152 Maryville
County, TN
89 B
#5153 Mattapoisett
County, MA
89 B
#5154 Mattawa
County, WA
89 B
#5155 Menard
County, TX
89 B
#5156 Mill Creek
County, PA
89 B
#5157 Mt. Airy
County, GA
89 B
#5158 Muenster
County, TX
89 B
#5159 Murfreesboro
County, AR
89 B
#5160 Northville
County, NY
89 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.