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Ohio Water Hardness

6 cities · average 8.0 GPG

Average hardness

8.0 GPG

Hardest city

Dayton 11.8 GPG

Softest city

Columbus 5.7 GPG

Tier distribution

Very Hard1Hard2Moderate3

Cities ranked by hardness

1Dayton11.8 GPGVery Hard2Toledo9.4 GPGHard3Akron8.2 GPGHard4Cincinnati6.6 GPGModerate5Cleveland6.5 GPGModerate6Columbus5.7 GPGModerate