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Ohio Water Hardness Map

6 cities · average 10.1 GPG

Average hardness

10.1 GPG

Hardest city

Canton 25 GPG

Softest city

Akron 6.3 GPG

Map — Ohio cities by hardness

Very HardHardModerateSoft

Tier distribution

Very Hard1Hard3Moderate2

Cities ranked by hardness

1Canton25 GPGVery Hard2Dayton8.1 GPGHard3Cincinnati7.4 GPGHard4Columbus7 GPGHard5Cleveland6.8 GPGModerate6Akron6.3 GPGModerate