Glenarm

Gas power plant in California, United States of America. Approximate location 34.126, -118.1494.

GasCaliforniaUnited States of America

Glenarm is a 266 MW gas power station in California, United States of America. It is operated by City of Pasadena - (CA). Based on reported annual generation of 65 GWh, it can supply roughly 18,571 homes. It ranks #1041 of 9,833 United States of America power plants by installed capacity. Commissioned in 2002, it is around 24 years old — relatively modern. In context, gas supplies about 40.0% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

266MW installed capacity
65GWh reported / yr
18,571homes powered
2002commissioned (~24 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0000422.

~26,000 t CO₂/yr (estimated) — in everyday terms

This facility's annual emissions are roughly equivalent to:

6,061passenger cars driven for a year
3,391homes' yearly energy use
433,333tree seedlings grown 10 years to absorb it

Estimated, not measured: from reported annual generation × a typical gas emission factor (~400 g CO₂/kWh, IPCC AR5 / US EIA). Actual emissions depend on plant efficiency and running hours.Equivalencies via US EPA Greenhouse Gas Equivalencies.

Reported generation trend

2013: 54 GWh20132014: 34 GWh20142015: 33 GWh20152016: 32 GWh20162017: 0 GWh20172018: 107 GWh20182019: 65 GWh2019107 GWh

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by City of Pasadena - (CA). All plants by this company →

Local climate & thermal context

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a warm-summer Mediterranean climate (Köppen Csb) — Northern Hemisphere, latitude 34.1°N — which shapes how much energy it can produce and how its output varies through the year.

18.5°Cannual mean temp
560heating degree-days (base 18°C)
754cooling degree-days (base 18°C)
140 melevation

Monthly mean temperature

J: 13 °CJF: 14 °CFM: 15 °CMA: 17 °CAM: 19 °CMJ: 22 °CJJ: 24 °CJA: 24 °CAS: 23 °CSO: 20 °CON: 16 °CND: 13 °CD24 °C

Heating degree-days here run 77% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 21/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

A gas turbine here also runs ~2% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

How it compares & nearby plants

The #619 largest gas power plant of 1818 in United States of America by capacity.

United States of America has 1818 gas power plants in this dataset, together about 546,436 MW of capacity.

Nearby power plants

Location

Coordinates 34.126, -118.1494 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Built from open public data; no personal information. Operate this site? Request a correction or removal.