Mercury From Sundance, Keephills and Genesee vs Sheerness and Battle River

Kilograms of mercury and its compounds. Mercury fell twice: first around 2011, when Alberta began requiring coal plants to capture it (Genesee from 185 kg in 2010 to 30 kg in 2014), and again as the plants stopped burning coal: Sundance from 318 kg in 2005 to 1.9 kg in 2024, Keephills from 110 kg to 5.4 kg. Genesee last reported mercury for 2023 (22 kg); Sheerness and Battle River stopped reporting it after 2020 and 2019. Releases to air reported each year to Environment and Climate Change Canada's National Pollutant Release Inventory (every air category summed), 2005 on, for the three power plants around Wabamun Lake (Sundance and Keephills in Parkland County; Genesee just across the North Saskatchewan in Leduc County; the Wabamun plant until it closed in 2010) and for Alberta's two other large coal plants that switched to natural gas, Sheerness near Hanna and Battle River near Forestburg. A year with no line is a year the plant reported none (below NPRI's threshold or no longer released), not a measured zero. Figures are what each operator reports.