Glossary Terms

Water containing total hardness in the amount of one grain per U.S. gallon (or more) measured as calcium carbonate equivalent.

A characteristic of natural water due primarily to the presence of dissolved polyvalent (valence greater than 1) cations, such as calcium (Ca+2) and magnesium (Mg+2). Water […]

The chemical formula for water.

Water found beneath the surface of the ground.

A natural mineral, primarily composed of complex silicates, which possess ion exchange properties. (See manganese greensand, zeolite.)

The equivalent weight of a substance in grams, divided by one thousand.

The basic unit of weight (mass) of the metric system, originally intended to be the weight of 1 cubic centimeter of water at 4oC. (One pound […]

A common basis for reporting water analyses in the United States and Canada; one grain per U.S. gallon equals 17.1 milligrams per liter (mg/l) or parts […]

A unit of eight equal to 1/7000th of a pound, or 0.0648 gram.