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  2. eGRID

eGRID PM2.5

eGRID PM2.5, NH3, and VOCs

eGRID uses data from both EPA's Clean Air and Power Division (CAPD) and the Energy Information Administration (EIA) to determine carbon dioxide (CO2), nitrogen oxides (NOX), sulfur dioxide (SO2), and mercury (Hg) emissions. Neither CAPD nor EIA collect data specifically on PM2.5 emissions. However, EPA’s National Emissions Inventory (NEI) is a source of PM2.5 emissions data. The annual emissions of air pollutants, including PM2.5, from most electric generating units are reported to the NEI.

EPA uses the NEI data to determine PM2.5 emissions at electric generating units. The paper below discusses the methods used to determine PM2.5 emissions and emission rates, including steps to estimate emissions for units that may not report to the NEI. Additionally, the data file below presents unit-level estimates of PM2.5 emissions and emission rates, as well as emissions and emission rates at the state and eGRID subregion levels for 2018 through 2021.

2022

To be released in 3rd quarter of 2025. 

2021

Ammonia (NH3) and volatile organic compounds (VOCs) data is new for 2021. It was developed using the same approach used for PM2.5.

  • 2021 PM2.5 Methodology (pdf) (594.33 KB, 06/24/2024)
  • eGRID 2018-2021 PM2.5 Data (xlsx) (13.97 MB, 06/24/2024)
  • eGRID2021 NH3 Data (xlsx) (13.51 MB, 06/24/2024)
  • eGRID2021 VOC Data (xlsx) (13.34 MB, 06/24/2024)

Previous Years

  • 2020 PM2.5 Methodology (pdf) (856.94 KB, 1/16/23)
  • 2019 PM2.5 Methodology (pdf) (500.74 KB, 1/16/23)
  • 2018 PM2.5 Methodology (pdf) (617.69 KB, 7/20/20)

eGRID

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Contact Us About eGRID
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on January 15, 2025
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