City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1297
Washington
County, WV
99 A
#1298 Waterville
County, WA
99 A
#1299 Williamstown
County, MO
99 A
#1300 Willits
County, CA
99 A
#1301 Wilson
County, NY
99 A
#1302 Woodburn
County, IN
99 A
#1303 Yorktown
County, VA
99 A
#1304 Youngstown
County, NY
99 A
#1305 Abbeville
County, LA
98 A
#1306 Abingdon
County, VA
98 A
#1307 Ada
County, OH
98 A
#1308 Adams
County, NY
98 A
#1309 Adna
County, WA
98 A
#1310 Afton
County, WY
98 A
#1311 Agency Village
County, SD
98 A
#1312 Ainsworth
County, NE
98 A
#1313 Alhambra
County, CA
98 A
#1314 Allardt
County, TN
98 A
#1315 Allen
County, OK
98 A
#1316 Allen
County, TX
98 A
#1317 Alma
County, MI
98 A
#1318 Alvin
County, TX
98 A
#1319 Amana
County, IA
98 A
#1320 American Falls
County, ID
98 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.