City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9649
Sierra Vista
County, AZ
54 D
#9650 Somerset
County, NJ
54 D
#9651 South Roxana
County, IL
54 D
#9652 Sparta
County, MO
54 D
#9653 St Elmo
County, IL
54 D
#9654 State Line
County, MS
54 D
#9655 Staunton
County, VA
54 D
#9656 Venice
County, FL
54 D
#9657 Vivian
County, LA
54 D
#9658 Warminster
County, PA
54 D
#9659 Webster
County, MA
54 D
#9660 Adair
County, OK
53 D
#9661 Amity
County, OR
53 D
#9662 Anna
County, TX
53 D
#9663 Bear Mountain
County, NY
53 D
#9664 Berry
County, AL
53 D
#9665 Cottagville
County, WV
53 D
#9666 Crandon
County, WI
53 D
#9667 Crestview
County, FL
53 D
#9668 Dayville
County, CT
53 D
#9669 Dubois
County, PA
53 D
#9670 Duquoin
County, IL
53 D
#9671 Elbrige
County, NY
53 D
#9672 Flora Vista
County, NM
53 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.