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In a sense, the hardness of water is the other side of the coin to alkalinity. Midwest, and the southwestern states of New Mexico and Arizona.
The hard water regions (100+ ppm) include the Canadian Prairies, the U.S. Regions with soft water (1 ppm to 50 ppm) include the Pacific Northwest from Oregon up through British Columbia. Table 19 Water hardness (in ppm of calcium carbonate) Type of Water Water hardness is usually expressed as the number of parts per million (ppm) of calcium carbonate present in the water (see Table 19).
Hard water is rich in minerals such as calcium and magnesium, which is the cause of “scale” in kettles.Soft water contains relatively few minerals and lathers easily.Water is classified as either soft or hard:
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