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Michigan Water Hardness Map

9 cities · average 6.7 GPG

Average hardness

6.7 GPG

Hardest city

Grand Rapids 8.33 GPG

Softest city

Lansing 5.73 GPG

Map — Michigan cities by hardness

Very HardHardModerateSoft

Tier distribution

Hard3Moderate6

Cities ranked by hardness

1Grand Rapids8.33 GPGHard2Ann Arbor7.4 GPGHard3Troy7.31 GPGHard4Southfield6.78 GPGModerate5Warren6.61 GPGModerate6Detroit6.26 GPGModerate7Livonia6.2 GPGModerate8Dearborn5.94 GPGModerate9Lansing5.73 GPGModerate