Hawaii Water Hardness Map
1 cities · average 2.0 GPG
Average hardness
2.0 GPG
Hardest city
Honolulu 2 GPG
Softest city
Honolulu 2 GPG
Map — Hawaii cities by hardness
Very HardHardModerateSoft
Tier distribution
Soft1
1 cities · average 2.0 GPG
Average hardness
Hardest city
Softest city