[4] Fly ash from the Brunner Island facility is approved for use in construction projects, especially for "use in concrete mixes to reduce alkali silica reactivity of aggregate.

[7] With respect to greenhouse gas emissions, out of 89 power stations in the state, Brunner Island ranks as the 13th most polluting.

[8] In 2006, Brunner Island ranked 27th on the list of most-polluting major power station in the US in terms of sulphur dioxide gas emission rate: it discharged 20.49 pounds (9.29 kg) of SO2 for each MWh of electric power produced that year (93,545 tons of SO2 per year in total).

[12][13] Brunner Island discharges all of its waste heat (about 1.44 times its electrical output) into its brand new cooling towers as of 2009.

As part of a 2018 out-of-court settlement with the Sierra Club, which had previously sued the plant and its current owner, Talen Energy, over air and water pollution, Brunner Island will eventually completely phase out coal.