WaterQ

City Water Quality Rankings in Ohio

417 cities ranked by drinking water quality.

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Popular city water quality comparisons

Amherst, OH vs Aurora, OH Compare → Austintown, OH vs Bainbridge Twp, OH Compare → Blacklick, OH vs Brewster, OH Compare → Canal Fulton, OH vs Eaton, OH Compare →

Trending Cities

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#121
Niles
County, OH
96 A
#122
Oakwood
County, OH
96 A
#123
Ontario
County, OH
96 A
#124
Payne
County, OH
96 A
#125
Plymouth
County, OH
96 A
#126
Swanton
County, OH
96 A
#127
Tallmadge
County, OH
96 A
#128
Washington Court House
County, OH
96 A
#129
Waterford
County, OH
96 A
#130
West Lake
County, OH
96 A
#131
West Milton
County, OH
96 A
#132
Westerville
County, OH
96 A
#133
Arlington
County, OH
95 A
#134
Bexley
County, OH
95 A
#135
Delaware
County, OH
95 A
#136
Deshler
County, OH
95 A
#137
Louisville
County, OH
95 A
#138
Mentor
County, OH
95 A
#139
Miamisburg
County, OH
95 A
#140
New Waterford
County, OH
95 A
#141
Oak Harbor
County, OH
95 A
#142
Pioneer
County, OH
95 A
#143
Seven Mile
County, OH
95 A
#144
Trenton
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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