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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#217
Marion
County, OH
92 A
#218
Marysville
County, OH
92 A
#219
Millfield
County, OH
92 A
#220
Minster
County, OH
92 A
#221
Mt Gilead
County, OH
92 A
#222
Munroe Falls
County, OH
92 A
#223
N Canton
County, OH
92 A
#224
New London
County, OH
92 A
#225
Oak Harbor
County, OH
92 A
#226
Russells Point
County, OH
92 A
#227
Somerville
County, OH
92 A
#228
South Lebanon
County, OH
92 A
#229
Vandalia
County, OH
92 A
#230
Andover
County, OH
91 A
#231
Bellefontaine
County, OH
91 A
#232
Berlin
County, OH
91 A
#233
Brookville
County, OH
91 A
#234
Convoy
County, OH
91 A
#235
Dalton
County, OH
91 A
#236
Fairfield
County, OH
91 A
#237
Lakemore
County, OH
91 A
#238
Mcarthur
County, OH
91 A
#239
Medina
County, OH
91 A
#240
Mingo Junction
County, OH
91 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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