{longname} Q21. How did EPA develop the general threshold of 25,000 metric tons of carbon dioxide equivalent (mtCO2e) per year?
{longname}
A21. EPA considered several factors when developing the reporting threshold, including the form of the threshold (e.g., emissions/year, potential to emit, capacity-based, facility or unit level). EPA reviewed existing capacity-based (e.g., 25 megawatts) and emissions-based thresholds used in other GHG emissions programs (e.g., California's 25,000 mtCO{~}2{~}e) and the 10,000 mtCO{~}2{~}e levels used in some voluntary programs, such as the Department of Energy's (DOE's) 1605b program. Based on our review, EPA has determined that the selected 25,000 metric ton CO{~}2{~}e threshold will cover many of the types of facilities and suppliers typically regulated under the CAA, while appropriately balancing emission coverage and burden. EPA estimated that at a threshold of 25,000 metric tons of mtCO{~}2{~}e/year, approximately 10,000 facilities and 85 percent of total GHG emissions will be covered. At the 10,000 mtCO{~}2{~}e/year level, EPA found that there would be a higher economic impact on small businesses including small industrial facilities and commercial buildings.

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Source: Legacy FAQ

Approval / Publishing History: Version 1

Expiration : none

Relevant Subparts: Subpart A
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