City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1537
Gloverville
County, SC
98 A
#1538 Golden
County, MS
98 A
#1539 Golden Valley
County, MN
98 A
#1540 Gordon
County, NE
98 A
#1541 Grafton
County, ND
98 A
#1542 Grain Valley
County, MO
98 A
#1543 Grand Rapids
County, MI
98 A
#1544 Granite Falls
County, WA
98 A
#1545 Grantham
County, NH
98 A
#1546 Great Falls
County, SC
98 A
#1547 Greenacres
County, WA
98 A
#1548 Greer
County, SC
98 A
#1549 Grosse Pointe Woods
County, MI
98 A
#1550 Grover Beach
County, CA
98 A
#1551 Guin
County, AL
98 A
#1552 Half Moon Bay
County, CA
98 A
#1553 Hallettsville
County, TX
98 A
#1554 Hamilton
County, MT
98 A
#1555 Hampton
County, VA
98 A
#1556 Hancock
County, MI
98 A
#1557 Hapeville
County, GA
98 A
#1558 Harrisburg
County, SD
98 A
#1559 Harrison
County, AR
98 A
#1560 Harvey
County, ND
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.