best answer > What is grains per gallon water hardness scale 2024?- QuesHub | Better Than Quora
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  • Ethan Martinez——Works at the International Committee of the Red Cross, Lives in Geneva, Switzerland.

    Grain per gallon (gpg) is a unit of water hardness defined as 1 grain (64.8 milligrams) of calcium carbonate dissolved in 1 US gallon of water (3.785412 L). It translates into 1 part in about 58,000 parts of water or 17.1 parts per million (ppm).read more >>
    +119962023-04-25 21:38:35

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