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FY24−25 Priority Goal

Phase Down the Production and Consumption of Hydrofluorocarbons (HFCs)

Goal leaders

Betsy Shaw

Deputy Assistant Administrator

Office of Air and Radiation (EPA)

Paul Gunning


Office of Atmospheric Protection (EPA)

To achieve

Phase down the production and consumption of hydrofluorocarbons (HFCs). By September 30, 2025, annual U.S. consumption of HFCs will be 40% below the baseline* of 302.5 million metric tons of carbon dioxide equivalent (MMTCO2e)** consistent with the HFC phasedown schedule in the American Innovation and Manufacturing (AIM) Act and codified in the implementing regulations.

*In two final rules signed in June 2023 (“Phasedown of Hydrofluorocarbons: Adjustment to the Hydrofluorocarbon Production Baseline” and “Phasedown of Hydrofluorocarbons: Allowance Allocation Methodology for 2024 and Later Years”), EPA amended the consumption baseline based on corrected data. The consumption baseline is 302.5 MMTEVe. Beginning in 2024, the phasedown steps will be measured from this HFC consumption baseline.

**EPA has determined that the exchange values included in subsection (c) of the AIM Act are identical to the GWPs included in IPCC (2007). Therefore, one million metric tons of carbon dioxide equivalent (MMTCO2e) is numerically equivalent to one MMTEVe. EPA is using the measurement MMTCO2e in this document since the public is more familiar with this term than MMTEVe.

Progress Updates