[4] PSE owns coal, hydroelectric, natural gas and wind power-generating facilities, with more than 3,500 MW of capacity.

In 2010, the Colstrip Generating station was the 8th largest greenhouse gas emitter among power plants in the United States.

[9] The company operates three hydroelectric facilities: Natural gas-fired power generation accounted for 22% of the utility's electricity fuel mix in 2016.

[5] The company operates these natural gas-fired facilities: Wind power and other generation sources, such as biomass and landfill gas, account for 1% of the utility's electricity fuel mix.

[20] A net metering program allows residential and business customers to return extra renewable energy solar power to the grid.

[21] Puget Sound Power and Light was itself preceded by several companies that were founded in the 1870s and 1880s and built the region's first hydroelectric plant at Snoqualmie Falls in 1898.

[24] Groups in three northwestern counties—Island, Jefferson, and Skagit—filed ballot measures for the November 2008 election to establish public utility districts in response to the planned buyout.

All investor owned utilities, including PSE, are required to create a Clean Energy Implementation Plan (CEIP) every four years starting in 2022.