Glossary Terms

A chemical process in which a molecule, atom, or ion loses electrons to an oxidant. The oxidized substance (which lost the electron) increases in positive valence. […]

A process of diffusion of a solvent such as water through a semi-permeable membrane which will transmit the solvent but impede most dissolved substances. The normal […]

Substances of or derived from plant or animal matter. Organic matter is characterized by its carbon-hydrogen structure.

The range of pressure, usually expressed in pounds per square inch, over which a water conditioning device or water system is designed to function.

Nephelometric Turbidity Unit

A solution containing a gram equivalent weight of a substance in one liter of solution. (See equivalent weight.)

Hardness caused by calcium or magnesium existing in compound form with chloride, sulfate, and nitrate anions rather than with the more common carbonate or bicarbonate anions. […]

A natural nitrogen compound sometimes found in well or surface waters. In high concentrations, nitrates can be harmful to young infants or young livestock.

A common designation for alkaline materials such as calcite (calcium carbonate) or magnesia (magnesium oxide) used in the neutralization of acid waters.