Energy Efficiency, GHG Emissions, Utilities  -  September 23, 2022

Edison Lowers Emissions

Edison International, Southern California Edison (SCE) and Edison Energy announced that in 2021, 80% of Scope 1 emissions came from SCE’s combined cycle natural gas plant, Mountainview, which is covered under California’s cap-and-trade market. 

The Scope 1 emissions declined an estimated 29% from 2020 due to Mountainview’s less frequent economic dispatch by the California Independent System Operator, according to a statement. 

Scope 1 emissions represent an estimated 8% of the company’s footprint and includes emissions from SCE's utility-owned generation, as well as emissions related to its transportation fleet, stationary combustion for backup generators and building heating, and fugitives such as sulfur hexafluoride. 

Scope 2 emissions represent an estimated 6% of Edison’s footprint and include line loss emissions from power SCE purchases from third parties and sells to customers and emissions declined an estimated 4% from 2020. This appears to be due to normal operational variability associated with SCE’s purchased power mix. 

Scope 3 emissions comprise the majority of the company’s footprint at an estimated 87%, and largely relate to the power SCE purchases from third parties and sells to customers. The inventory includes, for the first time in 2021, an estimate of emissions from Edison International and SCE’s supply chain as it relates to goods and services, capital goods and upstream transportation and distribution. In 2021, Scope 3 emissions declined 3% compared to 2020. The reduction appears to be predominantly due to normal operational variability associated with SCE’s purchased power mix.

Edison International is committed to achieving net-zero GHG emissions across Scopes 1, 2 and 3 by 2045 and delivering 100% carbon-free power to SCE customers by 2045. This goal is a statutory requirement in California and is supported by interim renewable energy compliance requirements through 2030. SCE has also set an interim carbon-free power target of 80% by 2030.

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