An acceptable level range for water hardness is going to be 100- 300 PPM depending on what city you live in and what the water treatment plant has decided on.
What is a good number for water hardness?
The membrane manufacturers will often specify what the maximum hardness concentration can be, but industry rule of thumb is that hardness should not exceed 120 to 170 mg/L (7 to 10 grains per gallon).
How do I know what water softener setting to use?
Check the settings on the water softener; often the softener will give an actual salt "dose" in pounds. You can compare that with the pounds (or volume) of salt in the brine tank. Also tell us the level of hardness in your water and see what your softener manual says should be the salt dose setting or that hardness.
What hardness should water softener be set?
0–3: If your hard water test strip indicates that your water is between 0–3 grains per gallon, your water doesn't require softening. 3–7: Water between 3–7 gpg is moderately hard, causing spotty dishes and dry skin.Jul 28, 2020