City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3385
Los Altos Hills
County, CA
94 A
#3386 Louisville
County, NE
94 A
#3387 Loup City
County, NE
94 A
#3388 Loveville
County, MD
94 A
#3389 Lyman
County, WY
94 A
#3390 Lynchburg
County, OH
94 A
#3391 Lyons
County, GA
94 A
#3392 Madison
County, TN
94 A
#3393 Malvern
County, AL
94 A
#3394 Manchester Center
County, VT
94 A
#3395 Manhattan
County, MT
94 A
#3396 Mansfield
County, TX
94 A
#3397 Manteca
County, CA
94 A
#3398 Mapleton
County, ND
94 A
#3399 Marblehead
County, MA
94 A
#3400 Markesan
County, WI
94 A
#3401 Markleysburg
County, PA
94 A
#3402 Marquette Heights
County, IL
94 A
#3403 Marysville
County, IN
94 A
#3404 Mason City
County, IL
94 A
#3405 Maunabo
County, PR
94 A
#3406 Mcdonald
County, OH
94 A
#3407 Meadville
County, PA
94 A
#3408 Mechanicsburg
County, PA
94 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.