City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9505
Manti
County, UT
56 D
#9506 Marengo
County, IA
56 D
#9507 Martindale
County, TX
56 D
#9508 Morris
County, IL
56 D
#9509 Mt Vernon
County, KY
56 D
#9510 Nashua
County, IA
56 D
#9511 Nauvoo
County, IL
56 D
#9512 Ocean Springs
County, MS
56 D
#9513 Okeene
County, OK
56 D
#9514 Pembroke
County, VA
56 D
#9515 Pheba
County, MS
56 D
#9516 Potosi
County, MO
56 D
#9517 Pueblo West
County, CO
56 D
#9518 Purdin
County, MO
56 D
#9519 Quartzsite
County, AZ
56 D
#9520 Ramsey
County, IN
56 D
#9521 Rich Square
County, NC
56 D
#9522 Rocket Center
County, WV
56 D
#9523 Seminole
County, TX
56 D
#9524 Sun Valley
County, ID
56 D
#9525 Tequesta
County, FL
56 D
#9526 Vian
County, OK
56 D
#9527 Walker
County, MN
56 D
#9528 Warsaw
County, IL
56 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.