Glossary

Term Main definition
Watershed

An area where water collects into a specific stream or area, such as a canyon, that is usually protected for drinking water collection.

Water year

October 1 – September 30.

Water share

Water shares are not the same as water rights. They are the amount of water in a “stock” that someone has purchased and is allowed to use.

Water right

The purchase of a right to use a specified amount of water from a specific source. Water rights must be put to beneficial use or risk forfeiture.

Secondary water

Untreated water that is used on property and landscapes.

Return flow

Water returned to the natural drainage after being used, like storm water, treated gray water, etc.

Per capita use

Measurement of water used per person, calculated as the sum of all M&I water used divided by the total area population. Reported as gallons per capital per day (GPCD).

Municipal and Industrial (M&I) water

Treated water used in cities and industrial applications.

Irrigation season

April 1 – October 1.

Gray water

Water after it has been used for laundry, showers, washing dishes, etc.

Flow rate

The measurement for how fast water is flowing. Usually measured in cfs (cubic feet per second) or gpd (gallons per day).

Diverted water

Water that is diverted from a natural drainage system for various uses.

Depleted water

Water that is used and not returned to a natural drainage system.

Culinary water

Or also called potable water, is water that has been treated to drinking water standards.

Beneficial use

Any water use that benefits communities in an environmental or social way.

Acre-foot (AF)

325,851 gallons, or the amount of water it takes to cover one acre of land in a foot of water.