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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#313
Oak Hill
County, OH
77 B
#314
Wellington
County, OH
77 B
#315
Williamsport
County, OH
77 B
#316
Arcanum
County, OH
76 B
#317
Dayton
County, OH
76 B
#318
Fairfield
County, OH
76 B
#319
Galion
County, OH
76 B
#320
Lagrange
County, OH
76 B
#321
Lockland
County, OH
76 B
#322
New Concord
County, OH
76 B
#323
Piketon
County, OH
76 B
#324
Sidney
County, OH
76 B
#325
West Union
County, OH
76 B
#326
Willard
County, OH
76 B
#327
Creston
County, OH
75 B
#328
New Lebanon
County, OH
75 B
#329
Peebles
County, OH
75 B
#330
Ravenna
County, OH
75 B
#331
Vermilion
County, OH
75 B
#332
Caldwell
County, OH
74 C
#333
Loudonville
County, OH
74 C
#334
Mount Sterling
County, OH
74 C
#335
Newcomerstown
County, OH
74 C
#336
Cuyahoga Falls
County, OH
73 C

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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