Glossary Terms

The prefix used with units of measure to indicate one thousandth of the unit. Example: a milliliter is one thousandth of a liter.

One thousandth of an inch.

The term applied to a filter medium to indicate the particle size above which all suspended solids will be removed throughout the rated capacity. As used […]

See micrometer.

Formally known as micron. A linear measure equal to one millionth of a meter or .00003937 inch. The symbol for the micrometer is “µm”.

milligrams per liter.

A gas additive that was incorporated in the mid-80’s into gasoline to reduce carbon monoxide (CO) emissions. It has increasingly appeared in groundwater due to spills […]

See filter media.

The plural form of “medium”.