Enter the water hardness value, in parts per million, into the calculator. Double-check the entry to ensure that it is accurate. Divide the ppm hardness value by 17.1, the conversion factor for ppm to gpg. The result is the water hardness expressed in grains per gallon. For example, say...
Water Hardness Classification1)Milligrams per Liter (mg/L)Grains per US Gallon (gpg) Soft 0 - 60 0 - 3.5 Moderate 61 - 120 3.5 - 7 Hard 121 - 180 7 - 10.5 Very Hard > 180 > 10.5 1) United States Geological Survey1 mg/L = 1 ppm 1 ppm = 0.058 grains/US gallon 1 ppm = 0.0...
content, usually consisting of mostly calcium and magnesium. In fact, the measure of water hardness is expressed in various units that express how much calcium carbonate is in a given volume of water.Unitsinclude ppm (parts per million), gpg (grains per gallon), or mg/L (milligrams per ...
Water hardness is caused by high levels of calcium and magnesium, which means it’s invisible to the naked eye. Home water testing is required to determine the hardness of your water. This is typically expressed in grains per gallon (gpg), parts per million (ppm) or milligrams per liter (...
The Hardness titration function allows you to set the hardness unit preference to either grains of hardness or ppm CaCO . The selected unit is also used in the LSI Calculator function. System Validation & Calibration Myron L® Company's POOLPRO provides a fast, precise, easy-to-use method ...
In fact, the measure of water hardness is expressed in various units that express how much calcium carbonate is in a given volume of water. Units include ppm (parts per million), gpg (grains per gallon), or mg/L (milligrams per liter). Hard water isn’t necessarily bad for you, but...
to generate the final vulnerability scores. To carry out this study, ArcGIS 10.2 software was used to develop the assessment score maps by reclassifying each factor data layer and then using the raster calculator to produce the groundwater vulnerability map. The groundwater vulnerability map and ...