Refining our emissions reporting
EPCOR’s Scope 1 and 2 greenhouse gas emission reporting for 2021 was independently verified by Brightspot Climate Inc. to a reasonable level of assurance using the ISO 14064-3 standard. The quantitative materiality threshold for reporting is 5% of total emissions.
EPCOR’s 2020 baseline emissions have been revised to 204,553 tCO2eq from the 193,402 tCO2eq reported in August 2021. The revision is due to refinements to the standards for calculating N2O emissions from wastewater treatment, and the documentation of additional contributions from operations in Ontario and British Columbia.
We expect a further and final revision to the 2020 emissions baseline in our 2022 performance update (to be published 2023), based on incorporation of the final 2020 Grid Intensity Factors being published by the governments of Canada and the United States. Because the carbon intensity of Alberta’s grid power supply is rapidly declining, we expect to report lower emissions for 2020 and 2021.
Three-quarters of EPCOR’s reported greenhouse gas emissions are from the consumption of electricity. A significant element of that calculation is the carbon intensity of grid-purchased power in each province and state where we do business. The actual grid intensity value is calculated by authorities on a lagging basis. We used the 2019 grid intensity value in our calculations of 2020 and 2021 emissions, because the 2020 and 2021 grid intensities were not yet available.
In general, due to the publication cycle for grid intensity values, we expect publication of final greenhouse emissions totals for each year will lag by two years.