Level of hardness in soft water
Soft water: < 1 mEq/LModerately hard: 1-3 mEq/LHard water: 3-6 mEq/LVery hard water: >6 mEq/LPark 23e pg: 727
Environment and health
< 1meq/L
1-3meq/L
3-6meq/L
>6meq/L
< 1meq/L