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Idaho Water Hardness

2 cities · average 12.4 GPG

Average hardness

12.4 GPG

Hardest city

Twin Falls 13.2 GPG

Softest city

Nampa 11.6 GPG

Tier distribution

Very Hard1Hard1

Cities ranked by hardness

1Twin Falls13.2 GPGVery Hard2Nampa11.6 GPGHard