HARDNESS = 350 ppm or 350 mg/l divided by 17.1
Divide Hardness (ppm / mg/l) by 17.1
Example: 350ppm (Hardness) divided by 17.1 = 20.47 Grains (How many grains to set your water softener)
Rural Water Association of Utah
The members and staff of RWAU invite and encourage you to join! By working together, we can achieve our mission to maintain and enhance our industry as a whole.