What is Hard Water?
Water is considered hard due to the natural presence
of dissolved calcium and magnesium.
 |
Water with as little as 7 grains per gallon of hardness contains one full pound of dissolved mineral per 1,000 gal. of water. |
Water hardness is responsible for most
scale formation in pipes and water heaters,
and forms insoluble "curd" when it reacts with soaps.
Hardness is usually expressed in grains per gallon,
parts per million, or milligrams per liter.
Water Quality Associtation
Hardness Classification Table |
| Classification |
Hardness |
| Soft Water |
0 to 1 Grains per Gallon |
| Slightly Hard Water |
1 to 3 Grains per Gallon |
| Moderately Hard Water |
3 to 7 Grains per Gallon |
| Hard Water |
7 to 10 Grains per Gallon |
| Very Hard Water |
10 to 14 Grains per Gallon |
| Extremely Hard Water |
Over 14 Grains per Gallon |
Total Water Use Map
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