City Water Quality Rankings in Ohio
431 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#385
Sebring
County, OH
67 C
#386 Atwater
County, OH
66 C
#387 Celina
County, OH
66 C
#388 Glandorf
County, OH
66 C
#389 Jeffersonville
County, OH
66 C
#390 Malvern
County, OH
66 C
#391 Brilliant
County, OH
65 C
#392 Lima
County, OH
64 C
#393 Mansfield
County, OH
64 C
#394 Somerset
County, OH
64 C
#395 Frazeysburg
County, OH
63 C
#396 Glouster
County, OH
63 C
#397 Manchester
County, OH
63 C
#398 St. Clairsville
County, OH
63 C
#399 Gambier
County, OH
62 C
#400 Richwood
County, OH
61 C
#401 West Jefferson
County, OH
61 C
#402 Rutland
County, OH
59 D
#403 Chesterland
County, OH
58 D
#404 Pomeroy
County, OH
57 D
#405 Dennison
County, OH
56 D
#406 Newport
County, OH
54 D
#407 Defiance
County, OH
50 D
#408 South Bloomfield
County, OH
48 D
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.