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806.2 MW Natural Gas operating in Maricopa, AZ
806.2 MW
Nameplate Capacity
7
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1972
Operating Since
Coordinates
33.4225, -111.9122
County
Maricopa, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arizona Public Service Co | Arizona Public Service | — |
| Owner(s) | Arizona Public Service Co | Pinnacle West Capital | — |
| Status | Operating | — | — |
Ocotillo is a natural gas-fired power plant located in Maricopa County, Arizona. The plant has a total capacity of 806.2 MW across 7 generators utilizing natural gas fired combustion turbine technology. It began operating in 1972. The plant is owned by Pinnacle West Capital and operated by Arizona Public Service Co (APS).
Ocotillo operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In the most recent year with available data, the plant generated 443,322 MWh, achieving a capacity factor of 6.3%. Ocotillo ranks as the 6th largest power plant out of 26 in Arizona, and 245th out of 945 nationally.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Arizona Public Service Company (AZPS)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Historic generation and capacity factor for this asset — the foundation for forward forecasts on the InfraSure platform.
57.1K MWh
Latest Month
443.3K MWh
Annual Generation
6.3%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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CO₂ Intensity
1054 lb/MWh
NOx
0.074 lb/MWh
SO₂
0.005 lb/MWh
CH₄
0.022 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
11.7%
Annual Net Gen
641 GWh
CO₂eq
1056 lb/MWh
Subregion
WECC Southwest
2013
$965/kW
Est. Construction Cost
Total estimated cost: $778.1M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-04-09
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