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According to the Water Quality Association, the hardness scale, measured in gpg of calcium carbonate, can be represented as follows: Less than 1 gpg is considered soft Between 1 and 3.5 gpg is considered slightly hard
Here is a quick hard water ppm chart that gives you a spectrum of water hardness in parts per million (ppm): Scale Of Water Hardness (From Soft To Very Hard Water) The internationally recognized water hardness scale recognizes 4 water hardness classes; from soft, moderately hard, hard, to very hard.
The majority of findings are delivered as a number that reports the concentration of calcium carbonate or other equivalents for a given unit of water. The water hardness scale result may be expressed in parts per million (ppm), grains per gallon (gpg), or milligrams per liter (mg/L).
The level of hardness is measured in grains per gallon (gpg) or milligrams per liter (mg/L). Water that registers between 0-1 gpg is considered soft; moderately hard water reads at 3.5-7 gpg; and any water with gpg over 7 is classified hard to very hard.
Soft water reduces the formation of rock-like hard water scale which encrusts water heaters, hot water pipes, shower heads, and water-using appliances. This scale can cause premature maintenance and failure.
To find out what size water softener you need, you must identify factors such as water hardness levels and daily water consumption habits, then use this information to choose the proper softener capacity.
Once you test your water and get your number, see where your water falls using the guide below: 0–3: If your hard water test strip indicates that your water is between 0–3 gpg, your water doesn’t require softening. 3–7: Water between 3–7 gpg is moderately hard, causing spotty dishes and dry skin.
