Water Hardness Grains Per Gallon

Water hardness can be measured in gpg or ppm but gpg is the most commonly used measurement.

Water hardness grains per gallon.

Find out exactly how many grains per gallon of water hardness you have. Soft water is defined by american national standards nsf ansi 44 and nsf ansi 330 as water containing 1 grain of hardness per gallon or 17 1 mg l hardness. Work out 180 17 1 10 526. If a test for hard water is measured in parts per million or milligrams per liter you can take the total hardness level and divide it by 17 1 to get hardness in grains per gallon.

Treated or softened water 0 1 gpg total grains x 17 1 equals ppm slightly hard 1 2 gpg total grains x 17 1 equals ppm medium hard 3 7 gpg total grains x 17 1 equals ppm hard 7. Typically water that contains less than 1 grain per gallon is. For example if your water test shows 250 mg l hardness you actually have 14 62 grains per gallon. One grain per gallon gpg is equivalent to 17 14 parts per million ppm.

For example say you have a water hardness value of 180 ppm. Hardness is usually expressed in grains per gallon or ppm as calcium carbonate equivalent. Different agencies and organizations may use slightly different classifications when discussing water hardness. If hardness is in mg l or ppm convert it into gpg by dividing it with 17 1.

Gpg means grains per gallon ppm means parts per million mg l means milligrams per liter note. Geological survey classification water quality association classification 1 0 17 1. The grain per gallon gpg is a unit of water hardness defined as 1 grain 64 8 milligrams of calcium carbonate dissolved in 1 us gallon of water 3 785412 l it translates into 1 part in about 58 000 parts of water or 17 1 parts per million ppm. Ppm and mg l are the same thing.

Grains per gallon gpg milligrams per liter mg l parts per million ppm u s. Add 2 drops of the red solution a. Water hardness map of the united states water hardness table of classifications and links to more information about water softening and effects. Professional hardness test kit 50 to 75 tests in heavy duty plastic water proof case.

A grain of water hardness is comparable to 1 7000th of a pound. The result is the water hardness expressed in grains per gallon. Divide the ppm hardness value by 17 1 the conversion factor for ppm to gpg. This range signifies the grain capacity of most water softeners available on the market.

Jumping mg l by 17 1 will change it to gpg. Grains per gallon is the business standard approach for talking about water hardness. Fill sample test to the 5 ml mark with water to be tested. What is soft water.

Formula to measure no of grains to be removed. Much more accurate than test strips.