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
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

Iron Map
Hardness Map
pH Map
Iron water explained
Hardness explained
pH explained
Troublesome Trio
Why soft water?
Low pH - Causes


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