City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8785
Mona
County, UT
66 C
#8786 Montgomery
County, PA
66 C
#8787 Monticello
County, MS
66 C
#8788 Mound City
County, KS
66 C
#8789 Mt Enterprise
County, TX
66 C
#8790 Nacogdoches
County, TX
66 C
#8791 Navasota
County, TX
66 C
#8792 New Orleans
County, LA
66 C
#8793 Palacios
County, TX
66 C
#8794 Palmetto
County, FL
66 C
#8795 Paulsboro
County, NJ
66 C
#8796 Petal
County, MS
66 C
#8797 Phoenix
County, AZ
66 C
#8798 Plymouth
County, NC
66 C
#8799 Poncha Springs
County, CO
66 C
#8800 Progreso
County, TX
66 C
#8801 Reno
County, TX
66 C
#8802 Richboro
County, PA
66 C
#8803 Richfield
County, PA
66 C
#8804 Richmond
County, KY
66 C
#8805 Rio
County, WI
66 C
#8806 Rockwell
County, IA
66 C
#8807 Roswell
County, NM
66 C
#8808 Sault Ste. Marie
County, MI
66 C
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.