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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).
Often, water hardness test results will be delivered in ppm or mg/L, which are equivalent. To use the same hardness scale above, you can simply convert your ppm or mg/L by dividing that number by 17.1 to find the gpg equivalent.
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.
For a quick reference, this water hardness scale used by Health Canada, breaks down results in mg/L and ppm as follows: Less than 60 mg/L is considered soft; Between 60 and 120 mg/L is considered medium-hard; Between 120 and 180 mg/L is considered hard; More than 180 mg/L is considered very hard; Using the Water Hardness Scale for Water ...
What’s the right water softener hardness level for you? Here’s how to find out (and how to change your softener’s settings).
31 Μαΐ 2022 · Your water softener hardness setting should be based on your water supplies water hardness level and its iron concentration, for example a water hardness level of 25 grains per gallon (gpg) and 0.3 parts per million (ppm) of iron would result in a water softener hardness setting of 27.
4 Νοε 2022 · Water hardness is usually measured with two units of measurement — parts per million (ppm) and grains per gallon (gpg). Ppm tells you how many units of calcium and magnesium there are in a million units of water.
