City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9889
Mokena
County, IL
55 D
#9890 Mora
County, NM
55 D
#9891 Orwigsburg
County, PA
55 D
#9892 Otego
County, NY
55 D
#9893 Pembroke
County, VA
55 D
#9894 Potosi
County, MO
55 D
#9895 Romney
County, WV
55 D
#9896 Shelbyville
County, TN
55 D
#9897 Snowflake
County, AZ
55 D
#9898 St Petersburg
County, FL
55 D
#9899 Stanton
County, TX
55 D
#9900 Walters
County, OK
55 D
#9901 Walthourville
County, GA
55 D
#9902 White Castle
County, LA
55 D
#9903 Alexandria
County, TN
54 D
#9904 Algoma
County, MS
54 D
#9905 Annapolis
County, IL
54 D
#9906 Batavia
County, IL
54 D
#9907 Bayamon
County, PR
54 D
#9908 Beattyville
County, KY
54 D
#9909 Beech Creek
County, PA
54 D
#9910 Birdseye
County, IN
54 D
#9911 Boiling Springs
County, NC
54 D
#9912 Borden
County, IN
54 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.