City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9649
Grafton
County, WV
59 D
#9650 Junction City
County, KS
59 D
#9651 Kilmichael
County, MS
59 D
#9652 Lake Barrington
County, IL
59 D
#9653 Latrobe
County, PA
59 D
#9654 Libby
County, MT
59 D
#9655 Longboat Key
County, FL
59 D
#9656 Louisburg
County, KS
59 D
#9657 Loysburg
County, PA
59 D
#9658 Marlinton
County, WV
59 D
#9659 Matteson
County, IL
59 D
#9660 Melbourne
County, FL
59 D
#9661 Montverde
County, FL
59 D
#9662 Moon Township
County, PA
59 D
#9663 Muscle Shoals
County, AL
59 D
#9664 Newton
County, TX
59 D
#9665 Oriental
County, NC
59 D
#9666 Oxford
County, AL
59 D
#9667 Palmetto
County, FL
59 D
#9668 Pangburn
County, AR
59 D
#9669 Park Ridge
County, NJ
59 D
#9670 Plain Dealing
County, LA
59 D
#9671 Pleasanton
County, KS
59 D
#9672 Prairie View
County, TX
59 D
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.