City Water Quality Rankings in Ohio
431 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#121
Bryan
County, OH
97 A
#122 Cleves
County, OH
97 A
#123 Delaware
County, OH
97 A
#124 Gnadenhutten
County, OH
97 A
#125 Harrison
County, OH
97 A
#126 Martins Ferry
County, OH
97 A
#127 Miamisburg
County, OH
97 A
#128 Mount Vernon
County, OH
97 A
#129 New Carlisle
County, OH
97 A
#130 Oak Harber
County, OH
97 A
#131 Painesville
County, OH
97 A
#132 Salem
County, OH
97 A
#133 Trenton
County, OH
97 A
#134 Anna
County, OH
96 A
#135 Baltimore
County, OH
96 A
#136 Beach City
County, OH
96 A
#137 Carlisle
County, OH
96 A
#138 Casstown
County, OH
96 A
#139 Chillicothe
County, OH
96 A
#140 Coldwater
County, OH
96 A
#141 Crestline
County, OH
96 A
#142 Doylestown
County, OH
96 A
#143 East Palestine
County, OH
96 A
#144 Gallipolis
County, OH
96 A
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.