Lakes Area Kinetico

Water Hardness Classification Table
from Water Conditioning Foundation

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Soft Water . . . 0 to 1/2 grains per gallon

Slightly Hard Water . . . 1/2 to 3 1/2 grains per gallon

Moderately Hard Water . . . 3 1/2 to 7 grains per gallon

Hard Water . . . 7 to 10 1/2 grains per gallon

Very Hard Water . . . over 10 1/2 grains per gallon

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Recommended Iron Limits . . . 0.3 parts per million
(to prevent objectionable taste or laundry staining)

Excerpt from Public Health and Service Drinking Water Standards 1962:
"Whereas the U.S. Public Health Service 1946 Drinking Water Standards set a limit of 0.3 mg/1 for iron and manganese combined, it is recommended that a limit be established for each and that the concentration of iron be limited to 0.3 mg/1."

Note: 1 mg/1 generally considered equal to 1 ppm.

Lakes Area Kinetico • 511 Wasington Street • Brainerd, MN 56401 • Phone (218) 855-1938 • Toll Free (877) 740-7873 • Email: Click Here