Environment
Air emissions - mercury (Hg)
Bayswater Power Station emissions of mercury increased 48%. Point source mercury emissions are calculated using stack test data and total gas flow allocated to each unit. All units had higher measurements of mercury in their stack test results compared to FY22. Fugitive emissions include dust emissions from vehicle movement and operation, wind erosion of exposed areas, and handling of coal and overburden.
Liddell Power Station emissions of mercury decreased 50%. The decrease in mercury emissions was mostly driven by lower measurements of mercury for Unit 4, and the decrease in operating hours.
AGL Torrens mercury emissions decreased 32%. The decrease in emissions aligns with the overall decrease in pipeline natural gas combustion at Torrens Island and Barker Inlet power stations (down 23%).
Notes
FY23 data was updated in November 2023. A subset of data (comprising emissions associated with the combustion of black coal at Bayswater and Liddell power stations, black and brown coal as well as natural gas at AGL Loy Yang Power Station, and gas and fuel oil at AGL Torrens Power Station) was reported with the initial release of the FY23 Data Centre on 10 August 2023.
For the purposes of this data set, AGL Torrens comprises the Torrens Island Power Station and the Barker Inlet Power Station which commenced operation in December 2019.
Emissions from Kwinana Power Station were included from FY20.
Air emissions data for AGL sites is publicly reported NPI data (see www.npi.gov.au/).
The emission factors used in AGL's NPI reports are sourced from relevant industry emission estimation technique manuals available on the NPI website.
SASB IF-EU-120a