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2022 Green-e® Residual Mix Emissions Rates (2020 Data) Released

Center for Resource Solutions (CRS) released updated Green-e® Residual Mix Emissions Rates, which are default greenhouse gas (GHG) emissions rates for untracked and unclaimed electricity by region in the U.S. with Green-e® certified renewable energy purchases factored out. Using renewable energy reduces a user's reported emissions from purchased electricity, and adjusts the average rate for other users. Electricity customers should use these rates if they did not voluntarily purchase renewable energy or do not have supplier-specific information. You can also view all Green-e® Residual Mix Emissions Rate Tables. Please note that data by NERC region for Canada is also available on request.


Accounting Methodology

Consistent with established standards in GHG reporting, CRS calculates residual mix emissions rates using emissions and generation data from eGRID subregions instead of larger NERC regions. This methodology aligns with WRI’s GHG Protocol Scope 2 Accounting Guidance as well as guidance from CDP and The Climate Registry; it provides finer-grain data because subregions are based on electricity distribution grids from load-serving entities and eGRID attributes specific power plants based on the physical link between the plant and the distribution grid regardless of state boundaries; and it is easier to use with the U.S. EPA’s Power Profiler.

Reporting Emissions from Purchased Electricity

When calculating the emissions from purchased electricity ("Scope 2" emissions), where more accurate information about the resources and emissions associated with electricity use is not available from the user's state, region, or electricity supplier, users reporting their GHG data should use these residual mix rates. Regional residual mix emissions rates that factor out all specified electricity purchases are not yet available for all regions of the U.S.

Use of this data is compatible with WRI's Scope 2 Guidance, which defines residual mix in more detail. Green-e® Energy also offers the Green-e® Energy Summary of WRI Scope 2 Guidance, a guide for purchasers of Green-e® Energy certified renewable energy on how to calculate Scope 2 emissions.