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ADWR Dictionary

ADWR Dictionary

ADWR Dictionary

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Lactating cow

Any cow that is producing milk that is present on-site at a dairy operation and receives water through the dairy operation’s watering system.

Land Subsidence

The lowering of the land-surface from changes that take place underground.

Landscapable area

The entire area of a lot less any areas covered by structures, parking lots, roads and any other area not physically capable of being landscaped.

Landscape watering

The application of water from any source, including reclaimed water, to a water-intensive landscaped area, a low water use landscaped area or revegetation acres within a turf-related facility.

Large community water system

A community water system that annually serves more than 1,850 acre-feet of water to customers.

Large municipal provider

Within an active management area, municipal water providers serving more than 250 acre-feet of water for non-irrigation use annually.

Large municipal provider

A municipal provider serving more than 250 ac-ft of water for non-irrigation use during a calendar year. 

Large-scale cooling facility

A facility which has control over cooling operations with a total combined cooling capacity greater than or equal to 1,000 tons. For the purposes of this definition, the minimum cooling tower size which shall be used to determine total facility cooling capacity is 250 tons. A large-scale cooling facility does not include a large-scale power plant that utilizes cooling towers to dissipate heat.

Large-scale metal mining and processing facility

An industrial facility at which mining and processing of metallic ores is conducted and that uses or has the potential to use more than 500 ac-ft of water per reporting year. For the purposes of this definition, the annual water use or potential annual water use includes all water from any source, including reclaimed water, used or projected to be used within or by the facility, regardless of the nature of the use.

Large-scale power plant

An industrial facility that produces or is designed to produce more than 25 megawatts of electricity including steam electric power plants and combustion turbine plants.

Limiting constituent

A chemical, physical, or biological constituent present in recirculating cooling tower water that, due to potential physical or biological factors or due to potential exceedance of any federal, state, or local environmental standards upon discharge as blowdown, should not be allowed to accumulate in recirculating cooling tower water above a certain concentration. 

Long-term storage account

An account established to credit water stored pursuant to a water storage permit at a water storage facility if the water cannot reasonably be used directly and, if the storage facility is within an AMA, the water would not be naturally recharged to the AMA.

Lost and Unaccounted For Water

The total quantity of water from any source that enters a municipal provider’s groundwater distribution system during a calendar year less the total quantity of authorized deliveries of water from the groundwater distribution system during the calendar year that are metered deliveries or deliveries that the municipal provider accounts for by a method of estimating water use approved by the Director. 

Lost water

 Water from any source, including effluent, which enters a distribution system and is lost from the system during transportation or distribution due to seepage, evaporation, leaks, breaks, phreatophyte use, or other causes. 

Low water use landscaped area

An area of land of at least one acre in aggregate, which is an integral part of a turf-related facility, watered by a permanent water application system and planted primarily with plants listed in ADWR’s Low Water Use/Drought Tolerant Plant List for the TAMA. Mature vegetation planted in a low water use landscaped area must cover at least 50 percent of the area.

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Arizona Department of Water Resources
1110 W Washington Street Suite 310
Phoenix, AZ 85007
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Phone: 602.771.8500 | Fax: 602.771.8689
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