WaterQ

City Water Quality Rankings in Ohio

431 cities ranked by drinking water quality.

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Popular city water quality comparisons

Amherst, OH vs Avon Lake, OH Compare → Bainbridge Twp, OH vs Beavercreek, OH Compare → Bedford, OH vs Blacklick, OH Compare → Brewster, OH vs Canal Fulton, OH Compare →

Trending Cities

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#145
Harrisville
County, OH
96 A
#146
Heath
County, OH
96 A
#147
Hebron
County, OH
96 A
#148
Hillsboro
County, OH
96 A
#149
Johnstown
County, OH
96 A
#150
Louisville
County, OH
96 A
#151
Maumee
County, OH
96 A
#152
Middlefield
County, OH
96 A
#153
New Bremen
County, OH
96 A
#154
Newton Falls
County, OH
96 A
#155
Oakwood
County, OH
96 A
#156
Oregon
County, OH
96 A
#157
Plymouth
County, OH
96 A
#158
Swanton
County, OH
96 A
#159
Tallmadge
County, OH
96 A
#160
Toronto
County, OH
96 A
#161
West Lake
County, OH
96 A
#162
Westerville
County, OH
96 A
#163
Woodville
County, OH
96 A
#164
Yellow Springs
County, OH
96 A
#165
Youngstown
County, OH
96 A
#166
Deshler
County, OH
95 A
#167
Lakeville
County, OH
95 A
#168
Pataskala
County, OH
95 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.

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