City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1585
Humboldt
County, TN
98 A
#1586 Huntsville
County, AR
98 A
#1587 Hurst
County, TX
98 A
#1588 Ishpeming
County, MI
98 A
#1589 Issaquah
County, WA
98 A
#1590 Jacksboro
County, TN
98 A
#1591 Jackson
County, WY
98 A
#1592 Jefferson
County, AR
98 A
#1593 Jefferson City
County, TN
98 A
#1594 Jenison
County, MI
98 A
#1595 John Day
County, OR
98 A
#1596 Johnson Bayou
County, LA
98 A
#1597 Johnstown
County, NY
98 A
#1598 Joshua
County, TX
98 A
#1599 Junction City
County, OR
98 A
#1600 Kalama
County, WA
98 A
#1601 Kalida
County, OH
98 A
#1602 Kansas City
County, KS
98 A
#1603 Kearney
County, NE
98 A
#1604 Kelso
County, WA
98 A
#1605 Kenansville
County, NC
98 A
#1606 Kenmore
County, NY
98 A
#1607 Kenmore
County, WA
98 A
#1608 Kenosha
County, WI
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.