City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3721
Damariscotta
County, ME
93 A
#3722 Danville
County, IN
93 A
#3723 Daphne
County, AL
93 A
#3724 Dayton
County, OR
93 A
#3725 Dayton
County, TX
93 A
#3726 Decatur
County, IL
93 A
#3727 Depoe Bay
County, OR
93 A
#3728 Des Arc
County, AR
93 A
#3729 Dover
County, DE
93 A
#3730 Drexel
County, MO
93 A
#3731 Dulce
County, NM
93 A
#3732 Durham
County, NC
93 A
#3733 Edna
County, TX
93 A
#3734 Elizabeth City
County, NC
93 A
#3735 Elizabethtown
County, NC
93 A
#3736 Englishtown
County, NJ
93 A
#3737 Estacada
County, OR
93 A
#3738 Eufaula
County, AL
93 A
#3739 Ferdinand
County, IN
93 A
#3740 Florence
County, OR
93 A
#3741 Fort Johnson
County, LA
93 A
#3742 Fort Scott
County, KS
93 A
#3743 Fox
County, AR
93 A
#3744 Frederick
County, MD
93 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.