Ocotillo — Plant Summary
- EIA Plant ID
- 116
- Capacity
- 806.2 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combustion Turbine
- Status
- Operating
- Location
- Maricopa, AZ
- Operating Since
- 1972
- Generators
- 7
- Operator
- Arizona Public Service Co
- Parent Company
- Pinnacle West Capital
- Annual Generation
- 443,322 MWh
- Capacity Factor
- 6.3%
- Balancing Authority
- Arizona Public Service Company
- ISO/RTO
- —
- NERC Region
- WECC
Ocotillo
OperatingNatural Gas
Ranked #6 of 33 Natural Gas plants in AZ#241 of 2009 nationally
806.2 MW Natural Gas operating in Maricopa, AZ — Arizona Public Service Company
EIAWD
806.2 MW
Nameplate Capacity
7
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1972
Operating Since
Location
Coordinates
33.4225, -111.9122
County
Maricopa, AZ
Nearby Plants
- AZ State University - Tempe Campus SolarSolar2.5 MW · 1.5 km
- Arizona State University CHPNatural Gas17.1 MW · 1.6 km
- CrosscutHydro3 MW · 3.6 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arizona Public Service Co | Arizona Public Service | — |
| Owner(s) | Arizona Public Service Co | Pinnacle West Capital | — |
| Status | Operating | — | — |
Ownership Chain
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Arizona Public Service Company
Grid Voltage
69 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
57.1K MWh
Latest Month
443.3K MWh
Annual Generation
6.3%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Regulatory·permitting
APS seeks license extension for Palo Verde Nuclear Plant
Arizona Public Service (APS) plans to renew operating licenses for all three units at Palo Verde Generating Station, extending operations to the mid-2060s, ensuring continued energy supply.
APS (operator)
Power Engineering·1 weeks ago
General
DOE nixes $1.8B loan to Arizona Public Service for transmission, renewables and storage
Additional de-obligations are in process but cannot be publicly disclosed until finalized,” said Olivia Tinari, deputy press secretary for...
Utility Dive·4 weeks ago
Industry·corporate
Intel's Fab 52 is bigger and better equipped than TSMC's Arizona facilities — Intel's production volume dwarfs TSMC's operations in the U.S.
Best semiconductor manufacturing facility in the U.S., but not fully ramped yet.
Intel (other)TSMC (other)
Tom's Hardware·3 months ago
Industry·corporate
APS says data centers could help pay for new Arizona natural gas power plant
Arizona Public Service says part of the plant will be covered with a subscription model from large industrial users like data centers.
APS (developer)
KJZZ·4 months ago
Last updated 2026-03-25
View all 10 articles