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Oregon Water Hardness Map

3 cities · average 1.0 GPG

Average hardness

1.0 GPG

Hardest city

Hillsboro 1.4 GPG

Softest city

Portland 0.5 GPG

Map — Oregon cities by hardness

Very HardHardModerateSoft

Tier distribution

Soft3

Cities ranked by hardness

1Hillsboro1.4 GPGSoft 2Bend1.2 GPGSoft 3Portland0.5 GPGSoft