HR-161-119
Placed on the Union Calendar, Calendar No. 542.
Sponsored by H. Griffith (R-VA)
What it does
This bill would change the definition of "modification" under the EPA's New Source Review (NSR) permitting program. Under current law, a change at a stationary source (such as a factory or power plant) that increases air pollutant emissions can trigger a requirement to obtain a new permit. This bill would narrow that trigger: only changes that increase the maximum hourly emission rate above the highest rate achieved in the prior 10 years would count as a "modification" requiring a permit. Changes made to reduce pollution, improve reliability, or improve safety would be exempt from the permit requirement — unless the EPA determines the change would cause an adverse effect on human health or the environment. The bill would also clarify that changes at major facilities that do not result in a "significant emissions increase" or "significant net emissions increase" are not considered construction or modification, including in areas that already fail to meet air quality standards (nonattainment areas).
Who benefits
Industrial facility operators — including manufacturers, refiners, power plant owners, and chemical producers — who would face fewer permitting requirements when making operational changes. Companies seeking to restore or improve facility reliability or safety without triggering lengthy permit reviews. Businesses in sectors with aging infrastructure that need upgrades. Employers and workers at facilities where permitting delays have slowed or blocked operational improvements. Regions where permitting backlogs have delayed economic activity.
Who is hurt
Residents living near industrial facilities in areas that already fail to meet federal air quality standards (nonattainment areas), who may see less regulatory oversight of facility changes. Environmental and public health advocacy organizations that rely on NSR permitting as a tool to require pollution controls when facilities are upgraded. State and local air quality agencies that use NSR permits to negotiate pollution reductions. Competing businesses that have already invested in pollution controls to comply with existing NSR requirements. Future generations who may bear health costs if air quality in nonattainment areas does not improve.
Supporters argue
Supporters argue that the current NSR permitting system is so burdensome and unpredictable that it discourages facilities from making efficiency and safety improvements, perversely keeping older, dirtier equipment in service longer. They contend that the 10-year maximum hourly rate baseline provides a clear, objective standard that reduces regulatory uncertainty, and that the bill preserves EPA's authority to block any change that would cause an adverse effect on human health or the environment — maintaining a meaningful safety backstop while removing red tape that delays beneficial upgrades.
Opponents argue
Opponents argue that narrowing the definition of "modification" would allow industrial facilities — particularly in communities already breathing air that fails federal health standards — to increase emissions without triggering the pollution controls that NSR permits are designed to require. They contend that using the maximum hourly rate over 10 years as the baseline, rather than actual average emissions, sets an artificially high bar that could allow significant real-world emission increases to go unreviewed, undermining the Clean Air Act's core goal of improving air quality in the most polluted areas of the country.
Constitutional context
The NSR program is authorized under the Clean Air Act, which rests on Congress's Commerce Clause power (Art. I, §8, cl. 3). Post-Loper Bright v. Raimondo (2024), courts will independently review EPA's interpretation of any ambiguous statutory terms in implementing this bill, rather than deferring to the agency — meaning the precise definitions Congress writes here carry heightened legal weight. The major questions doctrine from West Virginia v. EPA (2022) is less directly implicated because this bill narrows rather than expands agency authority.
Checks and balances
Congress would narrow the scope of EPA's permitting authority; EPA retains discretion to block specific changes it determines would cause adverse health or environmental effects; courts would independently review EPA's application of the new definitions under post-Loper Bright standards.
Historical precedent
The EPA has repeatedly revised NSR permitting rules administratively — most notably in 2002 under the Bush administration's "NSR Reform" rules, which were challenged in court and partially vacated — but Congress has not previously legislated a specific hourly-rate baseline standard for what constitutes a modification.