Industry Warns PM2.5 Standard Will Create Permitting Gridlock; States Cite Exceptional‑event and Implementation Burdens

Industry groups, state air regulators and environmental advocates used differing data and assumptions at a House Energy and Commerce Subcommittee hearing to argue about whether the 2024 annual PM2.5 standard will prevent new construction and modernization projects or whether the law’s health‑first framework should be preserved and implementation improved.

Trade associations and manufacturers told the panel the 2024 PM2.5 standard — which tightened the annual limit from 12 µg/m3 to 9 µg/m3 — sits very near background concentrations in many parts of the country and leaves little “headroom” for new facilities. Paul Noe of the American Forest and Paper Association said the average background level is about 8 µg/m3 and that a typical project needs an increment of roughly three units; that arithmetic, he said, puts many projects above a 9‑unit standard and effectively blocks them. “By putting the standard so close to background level…you've now blocked a project that is both gonna create more jobs…and also preventing more efficient technology that’s also cleaner technology,” Noe testified.

Chad Whiteman of the U.S. Chamber’s Global Energy Institute presented a modeling product showing many additional counties in projected nonattainment when 2023 wildfire emissions are included; he said EPA’s public maps did not incorporate the most recent fires and did not analyze adjacent counties at the same level. “This is the time that we've seen the NAAQS program reduce emissions so low that the impacts are getting around background levels,” Whiteman told members.

State regulators described operational strains. Jim Boylan of the Georgia Environmental Protection Division said Georgia permits roughly 1.5 million acres of prescribed burns annually to reduce wildfire risk; he said the state has submitted many exceptional‑event demonstrations to EPA and that the current exceptional‑events process is resource‑intensive and, he argued, should be codified or clarified. Boylan cited a proposed 20‑building, $16 billion data‑center campus that would require more power than a Vogtle nuclear reactor and said permitting for the power needed will “pose multiple permitting challenges” under the current NAAQS implementation.

Public‑health and environmental witnesses disputed the severity of the permitting claim and urged implementation fixes instead of statutory change. John Walke of NRDC called the maps used by industry “fiction” and said implementation tools already exist — exceptional events, international transport and rural transport provisions — to deal with pollution from sources outside a state’s control. He and other witnesses recommended faster and more predictable guidance from EPA on exceptional events and state implementation plans rather than changing the NAAQS legal framework.

The subcommittee also heard debate over advisory and scientific capacity. Boylan said the Clean Air Science Advisory Committee should include more state air‑agency representation to better reflect practical implementation experience. Walke and others warned that changes to CASAC membership, coupled with proposed or announced reductions at EPA’s Office of Research and Development, risk degrading the scientific basis for standard setting.

Members heard no formal votes at the hearing. Witnesses and lawmakers agreed on the need for clearer implementation guidance, but remained sharply divided over whether the correct response is statutory reform or improved implementation and agency resourcing.