City Water Quality Rankings in Ohio
417 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#289
Trotwood
County, OH
82 B
#290 Westlake
County, OH
82 B
#291 Chagrin Falls
County, OH
81 B
#292 Columbus Grove
County, OH
81 B
#293 Ironton
County, OH
81 B
#294 Reading
County, OH
81 B
#295 Tiltonsville
County, OH
81 B
#296 Wakeman
County, OH
81 B
#297 Bellaire
County, OH
80 B
#298 Bellbrook
County, OH
80 B
#299 Jefferson
County, OH
80 B
#300 South Amherst
County, OH
80 B
#301 Tuscarawas
County, OH
80 B
#302 Waverly
County, OH
80 B
#303 West Liberty
County, OH
80 B
#304 Cleveland
County, OH
79 B
#305 Columbus
County, OH
79 B
#306 Delta
County, OH
79 B
#307 Barnesville
County, OH
78 B
#308 Cambridge
County, OH
78 B
#309 Genoa
County, OH
78 B
#310 Grafton
County, OH
78 B
#311 Obetz
County, OH
78 B
#312 Crooksville
County, OH
77 B
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.