Where is University of Arizona - Biosphere 2?

In Pinal County, Arizona (AZ). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is University of Arizona - Biosphere 2?

3 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.

Who owns University of Arizona - Biosphere 2?

EIA-860M names University of Arizona - Biosphere 2 as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as University of Arizona - Biosphere 2 LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — University of Arizona - Biosphere 2 here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "University of Arizona - Biosphere 2 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is University of Arizona - Biosphere 2 still running?

EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.

University of Arizona - Biosphere 2

University of Arizona - Biosphere 2 is a 3 MW natural gas power plant in Pinal County, Arizona, operated by University of Arizona - Biosphere 2. EIA-860M lists 2 generating units here. Its units entered service between 1990 and 2000.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 3.1 MW; 3.1 MW net summer
Generating units: 2
In service: 1990–2000
EIA plant ID: 54594

Where it is

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County: Pinal County, Arizona
Coordinates: 32.578, -110.8526
Balancing authority: WALC
Sector: Commercial Non-CHP

Units, technology and status

Operator of record: University of Arizona - Biosphere 2
Primary energy source: Natural gas
Technologies: Natural Gas Internal Combustion Engine, Petroleum Liquids
Status: Standby/Backup

This site runs on more than one energy source. EIA-860M capacity splits: Natural gas 2 MW, Petroleum 2 MW. It is filed here under Natural gas, the source with the most capacity.

Every plant University of Arizona - Biosphere 2 reports to EIA →

University of Arizona - Biosphere 2: FAQ

Where is University of Arizona - Biosphere 2?: In Pinal County, Arizona (AZ). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is University of Arizona - Biosphere 2?: 3 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns University of Arizona - Biosphere 2?: EIA-860M names University of Arizona - Biosphere 2 as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as University of Arizona - Biosphere 2 LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — University of Arizona - Biosphere 2 here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "University of Arizona - Biosphere 2 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is University of Arizona - Biosphere 2 still running?: EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.