Glenarm
Natural gas power plant in Los Angeles County, California. 265.6 MW of nameplate capacity across 6 generators, operated by City of Pasadena - (CA).
Also known as Glenarm Power Plant · EIA plant 422
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Key facts
- Capacity
- 265.6 MWNameplate
- Generators
- 6 operatingEIA-860M, August 2026
- Operating since
- January 1976First generator online
- Operator
- City of Pasadena - (CA)EIA operator ID 14534
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 5 CAISO nodesResource nodes with prices
- Location
- Los Angeles County, CA34.1260, −118.1494
- EIA plant ID
- 422EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Glenarm produces
Free · EIA-923Net generation, 2025
130 GWh
129,845 MWh, final
Capacity factor, 2025
5.6%
2024: 1.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
18.1–129.8
GWh a year. Low 2021, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 7,189 | Not reported | 12 of 12 |
| 2001 | 3,886 | Not reported | 12 of 12 |
| 2002 | 569 | Not reported | 12 of 12 |
| 2003 | 56 | Not reported | 12 of 12 |
| 2004 | 0 | Not reported | 12 of 12 |
| 2005 | 27,403 | Not reported | 12 of 12 |
| 2006 | 43,305 | Not reported | 12 of 12 |
| 2007 | 41,658 | Not reported | 12 of 12 |
| 2008 | 35,960 | Not reported | 12 of 12 |
| 2009 | 100,033 | Not reported | 12 of 12 |
| 2010 | 78,323 | 5.0% | 12 of 12 |
| 2011 | 84,349 | 5.4% | 12 of 12 |
| 2012 | 89,968 | 5.7% | 12 of 12 |
| 2013 | 53,597 | 3.4% | 12 of 12 |
| 2014 | 33,607 | 2.1% | 12 of 12 |
| 2015 | 32,793 | 2.1% | 12 of 12 |
| 2016 | 32,284 | Not reported | 12 of 12 |
| 2017 | 79,189 | 3.4% | 12 of 12 |
| 2018 | 107,233 | 4.6% | 12 of 12 |
| 2019 | 64,961 | 2.8% | 12 of 12 |
| 2020 | 58,789 | 2.5% | 12 of 12 |
| 2021 | 18,062 | Not reported | 12 of 12 |
| 2022 | 51,765 | 2.2% | 12 of 12 |
| 2023 | 40,910 | 1.8% | 12 of 12 |
| 2024 | 38,514 | 1.7% | 12 of 12 |
| 2025 | 129,845 | 5.6% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDCO₂, 2025
72,121
US short tons. 2024: Not reported
SO₂, 2025
0
US short tons
NOx, 2025
7
US short tons
CO₂ per MWh, calculated
0.56 t
About 1,111 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (GT3, GT4, GT5), matched to EIA plant 422 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | 28.8 | January 1976 |
| GT2 | Natural Gas Fired Combustion Turbine | 28.8 | January 1976 |
| GT3 | Natural Gas Fired Combustion Turbine | 60.5 | January 2004 |
| GT4 | Natural Gas Fired Combustion Turbine | 60.5 | January 2004 |
| GT5 | Natural Gas Fired Combined Cycle | 71.0 | December 2016 |
| ST1 | Natural Gas Fired Combined Cycle | 16.0 | December 2016 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists City of Pasadena - (CA) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Glenarm
More plants operated by City of Pasadena - (CA)
Questions about Glenarm
How much power does Glenarm produce?
Glenarm reported 129,845 MWh (130 GWh) of net generation in 2025, a 5.6% capacity factor on 265.6 MW of nameplate capacity.
Where is Glenarm?
Glenarm is in Los Angeles County, California, at 34.1260, −118.1494. It is in the California Independent System Operator balancing area (CISO).
Who operates Glenarm?
EIA-860M for August 2026 lists City of Pasadena - (CA) as the operator (EIA operator ID 14534). The operator is not always the owner.
When did Glenarm start operating?
Its first generator began operating in January 1976, according to EIA-860M.
Does InfraMap have power prices for Glenarm?
Yes. InfraMap has CAISO day-ahead and real-time prices at 5 price nodes linked to Glenarm, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page