Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/116
EIA plant 116
Tempe · Maricopa · AZ
Ocotillo
Operated by Arizona Public Service Co
Published location
Where is Ocotillo?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
33.422500, -111.912200
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the AZ plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
162,436
270,364
388,685
449,200
542,399
649,551
719,053
85,922
99,633
1063,915
1167,051
1211,675
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 62,436 |
| 2 | 70,364 |
| 3 | 88,685 |
| 4 | 49,200 |
| 5 | 42,399 |
| 6 | 49,551 |
| 7 | 19,053 |
| 8 | 5,922 |
| 9 | 9,633 |
| 10 | 63,915 |
| 11 | 67,051 |
| 12 | 11,675 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 62,436 MWh |
| 2 | 70,364 MWh |
| 3 | 88,685 MWh |
| 4 | 49,200 MWh |
| 5 | 42,399 MWh |
| 6 | 49,551 MWh |
| 7 | 19,053 MWh |
| 8 | 5,922 MWh |
| 9 | 9,633 MWh |
| 10 | 63,915 MWh |
| 11 | 67,051 MWh |
| 12 | 11,675 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| GT3 | Natural Gas Fired Combustion Turbine | NG | 140 | OP |
| GT4 | Natural Gas Fired Combustion Turbine | NG | 140 | OP |
| GT5 | Natural Gas Fired Combustion Turbine | NG | 140 | OP |
| GT6 | Natural Gas Fired Combustion Turbine | NG | 140 | OP |
| GT7 | Natural Gas Fired Combustion Turbine | NG | 140 | OP |
| GT1 | Natural Gas Fired Combustion Turbine | NG | 53.1 | OP |
| GT2 | Natural Gas Fired Combustion Turbine | NG | 53.1 | OP |
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Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
116
Sector
Electric Utility
Water source
Wells
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Ocotillo power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Ocotillo
Variation in the published months
Across 12 numeric monthly generation entries, 3 has the highest recorded value (88,685 MWh) and 8 the lowest (5,922 MWh). Their difference is 82,763 MWh. Missing months have not been treated as zero.
Reading the MW column
In the 7 numeric rows displayed in this table, MW ranges from 53.1 (GT1, GT2) to 140 (GT3, GT4, GT5). The difference is 86.9 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | 53.1 | 50.0 | 56.0 | 4.0 |
| GT2 | Natural Gas Fired Combustion Turbine | 53.1 | 50.0 | 56.0 | 4.0 |
| GT3 | Natural Gas Fired Combustion Turbine | 140.0 | 104.0 | 107.0 | 45.0 |
| GT4 | Natural Gas Fired Combustion Turbine | 140.0 | 102.0 | 103.0 | 45.0 |
| GT5 | Natural Gas Fired Combustion Turbine | 140.0 | 104.0 | 105.0 | 45.0 |
| GT6 | Natural Gas Fired Combustion Turbine | 140.0 | 101.0 | 103.0 | 45.0 |
| GT7 | Natural Gas Fired Combustion Turbine | 140.0 | 104.0 | 105.0 | 45.0 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.