City Water Quality Rankings in Ohio
431 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#409
Napoleon
County, OH
47 D
#410 Wauseon
County, OH
47 D
#411 Byesville
County, OH
46 D
#412 Belpre
County, OH
44 F
#413 Fredricktown
County, OH
44 F
#414 New Lexington
County, OH
43 F
#415 Yorkville
County, OH
41 F
#416 Bethesda
County, OH
40 F
#417 Kingston
County, OH
39 F
#418 Woodsfield
County, OH
38 F
#419 Kings Island
County, OH
28 F
#420 Wellsville
County, OH
23 F
#421 Milford
County, OH
22 F
#422 East Liverpool
County, OH
20 F
#423 Kelleys Island
County, OH
16 F
#424 Jeromesville
County, OH
9 F
#425 Alliance
County, OH
3 F
#426 Attica
County, OH
0 F
#427 Cadiz
County, OH
0 F
#428 Holgate
County, OH
0 F
#429 Nelsonville
County, OH
0 F
#430 Van Wert
County, OH
0 F
#431 White Cottage
County, OH
0 F
Frequently Asked Questions
How are city water quality rankings calculated in Ohio?
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 cities in Ohio?
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.