hard ness of water is 10 ppm ....what does it mean?
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The simple definition of water hardness is the amount of dissolved calcium and magnesium in the water. Hard water is high in dissolved minerals, largely calcium and magnesium. ... When hard water is heated, such as in a home water heater, solid deposits of calcium carbonate can form.
1ppm = 1 mg/L CaCO3.
10 ppm=10mg/L CaCO3.
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