City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4513
Hanover
County, KS
91 A
#4514 Harrisburg
County, PA
91 A
#4515 Haven
County, KS
91 A
#4516 Hilo
County, HI
91 A
#4517 Holcomb
County, KS
91 A
#4518 Holden
County, MO
91 A
#4519 Holland
County, IN
91 A
#4520 Hood River
County, OR
91 A
#4521 Hot Springs
County, SD
91 A
#4522 Houghton
County, MI
91 A
#4523 Hudson
County, WI
91 A
#4524 Jefferson
County, OR
91 A
#4525 Jefferson
County, PA
91 A
#4526 Justin
County, TX
91 A
#4527 Kannapolis
County, NC
91 A
#4528 King George
County, CA
91 A
#4529 Kingsport
County, TN
91 A
#4530 Kingwood
County, WV
91 A
#4531 Kronenwetter
County, WI
91 A
#4532 Ladoga
County, IN
91 A
#4533 Lake Katrine
County, NY
91 A
#4534 Lakemoor
County, IL
91 A
#4535 Lakemore
County, OH
91 A
#4536 Lansing
County, KS
91 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.