City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1
Aberdeen
County, ID
100 A
#2 Adams Center
County, NY
100 A
#3 Addison
County, AL
100 A
#4 Addison
County, TX
100 A
#5 Adkins
County, TX
100 A
#6 Adrian
County, MI
100 A
#7 Aitkin
County, MN
100 A
#8 Albion
County, NY
100 A
#9 Alexandria Bay
County, NY
100 A
#10 Algoma
County, WI
100 A
#11 Algonac
County, MI
100 A
#12 Alpena
County, MI
100 A
#13 Alpine Meadows
County, CA
100 A
#14 Alta
County, WY
100 A
#15 Alto Pass
County, IL
100 A
#16 American Canyon
County, CA
100 A
#17 Americus
County, GA
100 A
#18 Amherst
County, OH
100 A
#19 Anderson Island
County, WA
100 A
#20 Andover
County, MN
100 A
#21 Annapolis
County, MD
100 A
#22 Anniston
County, AL
100 A
#23 Antioch
County, CA
100 A
#24 Apo Ap
County, GU
100 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.