City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8233
Isabela
County, PR
74 C
#8234 Ladd
County, IL
74 C
#8235 Lake City
County, MN
74 C
#8236 Lake Mills
County, WI
74 C
#8237 Lake Odessa
County, MI
74 C
#8238 Lake Wales
County, FL
74 C
#8239 Lancaster
County, PA
74 C
#8240 Landis
County, NC
74 C
#8241 Leland
County, MS
74 C
#8242 Lena
County, MS
74 C
#8243 Log Lane Village
County, CO
74 C
#8244 Logan
County, IA
74 C
#8245 Louise
County, TX
74 C
#8246 Lynn
County, MA
74 C
#8247 Lynwood
County, IL
74 C
#8248 Lyons
County, IL
74 C
#8249 Madison
County, AL
74 C
#8250 Makawao
County, HI
74 C
#8251 Mapleton
County, MN
74 C
#8252 Marfa
County, TX
74 C
#8253 Marion
County, MA
74 C
#8254 Marquez
County, TX
74 C
#8255 Martindale
County, TX
74 C
#8256 Mc Gregor
County, TX
74 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.