WaterQ

City Water Quality Rankings in Ohio

417 cities ranked by drinking water quality.

All States AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY

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

Fairbanks, AK Fresno, CA San Jose, CA Sacramento, CA San Francisco, CA Houston, TX Fargo, ND
#169
Columbiana
County, OH
93 A
#170
Doylestown
County, OH
93 A
#171
Heath
County, OH
93 A
#172
Johnstown
County, OH
93 A
#173
Mount Vernon
County, OH
93 A
#174
Oregon
County, OH
93 A
#175
Pataskala
County, OH
93 A
#176
Russells Point
County, OH
93 A
#177
Salem
County, OH
93 A
#178
Shreve
County, OH
93 A
#179
Toronto
County, OH
93 A
#180
Anna
County, OH
92 A
#181
Belle Valley
County, OH
92 A
#182
Fairport Harbor
County, OH
92 A
#183
Geneva
County, OH
92 A
#184
Greenville
County, OH
92 A
#185
Groveport
County, OH
92 A
#186
Lakeville
County, OH
92 A
#187
Marietta
County, OH
92 A
#188
Marion
County, OH
92 A
#189
Martins Ferry
County, OH
92 A
#190
Millfield
County, OH
92 A
#191
Mingo Junction
County, OH
92 A
#192
Minster
County, OH
92 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.

Explore More Water Quality Data

State Rankings National Rankings Compare Cities All Water Systems