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Educational Information
1/7000 of a pound - normally used in relation to hardness.
One part dissolved material in one million parts of water. Used as a measurement for Iron, Manganese, Total Dissolved Solids "TDS", Hydrogen Sulfide, Chlorides, Sulfates, and Tannins.
Measurement use, same as ppm. Normally used for a more accurate measurement or when small quantities of certain elements cause big problems in relation to Iron, Manganese, Sulfur, Nitrates and Silica.
1 gpg = 17.1 ppm
The weight of solids, per unit volume of water, which are true in solution. Can be determined by the evaporation of a measurement volume of filtered water and determination of the residue weight. A common alternative method to determine TDS is to measure the conductivity of water.
A characteristic of natural water due to the presence of dissolved Calcium and Magnesium. Water hardness is responsible for most scale formation in pipes and water heaters and forms insoluble "curd" when it reacts with soaps. Hardness is usually expressed in grains per gallon (gpg), parts per million (ppm) or milligrams per liter (mg/l), all as calcium carbonate equivalent.
Iron oxidized in water and is visible. Also called red water iron.
PH is a measurement of the intensity of the acidity or alkalinity of water on a scale from 0 to 14, with 7 being neutral. When acidity is increased, the hydrogen ion concentration increases, resulting in a lower PH value. Similarly, when alkalinity is increased, the hydrogen ion concentration decreases, resulting in higher PH.
The PH value is an exponential function which concludes PH 10 is 10 times as alkaline as PH 9 and 100 times as alkaline as PH 8. Similarly, PH 4 is 100 times as acid as PH 6 and 1000 times as acid as PH 7.
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