New Source Review Permitting Improvement Act

Hozzl · 2025-12-12T09:07:55Z

Explore the details of House Bill 161 New Source Review Permitting Improvement Act currently in Congress. Get insights into its purpose, current status, sponsors, and potential impact on Environmental Protection. Stay informed on legislative developments.

12/12/2025, 9:07 AM

Summary of Bill HR 161

Bill 119 hr 161, also known as the Clean Air Act Amendments, aims to amend sections 111, 169, and 171 of the Clean Air Act in order to provide clarity on when a physical change or change in operation of a stationary source constitutes a modification or construction. The bill seeks to address confusion and ambiguity surrounding these definitions in order to ensure that regulations are properly enforced and that air quality standards are upheld.

The proposed amendments in the bill would help to streamline the process for determining whether a modification or construction has occurred at a stationary source, which is crucial for ensuring compliance with the Clean Air Act. By providing clear guidelines and definitions, the bill aims to make it easier for businesses and regulators to understand and adhere to the requirements set forth in the Act.

In addition to clarifying definitions, the bill also includes provisions for other purposes related to the Clean Air Act. These additional provisions are aimed at improving air quality, protecting public health, and promoting environmental sustainability. Overall, Bill 119 hr 161 seeks to enhance the effectiveness of the Clean Air Act by providing much-needed clarity and guidance on the definitions of modification and construction at stationary sources. By doing so, the bill aims to ensure that air quality standards are met and that public health and the environment are protected.

Congressional Summary of HR 161

New Source Review Permitting Improvement Act

This bill modifies terminology for purposes of the New Source Review (NSR) permitting program of the Environmental Protection Agency (EPA).

In order for a change to a stationary source to be a modification (a change to a stationary source that increases the air pollutant emissions or results in new pollutants) for purposes of the NSR permitting program, the maximum hourly emission rate achievable by such source must be higher than the maximum hourly rate achievable by such source during any hour in the 10-year period preceding the change.

A change at a stationary source is not considered to be a modification under the bill if it is designed to (1) reduce the amount of any air pollutant emitted; or (2) restore, maintain, or improve the reliability of operations at, or safety of, the source. However, such changes are not excepted if the EPA determines the increase in the maximum achievable hourly emission rate from such change would cause an adverse effect on human health or the environment.

Construction, in connection with a major emitting facility (a type of stationary source), does not include a change at such a facility that does not result in a significant emissions increase or a significant net emissions increase.

In relation to major emitting facilities in nonattainment areas, the terms modifications and modified do not include changes at such facilities that do not result in a significant emissions increase or a significant net emissions increase.

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Current Status of Bill HR 161

Bill HR 161 is currently in the status of Bill Introduced since January 3, 2025. Bill HR 161 was introduced during Congress 119 and was introduced to the House on January 3, 2025. Bill HR 161's most recent activity was Forwarded by Subcommittee to Full Committee by the Yeas and Nays: 12 - 11. as of December 10, 2025

Bipartisan Support of Bill HR 161

Total Number of Sponsors

Democrat Sponsors

Republican Sponsors

Unaffiliated Sponsors

Total Number of Cosponsors

Democrat Cosponsors

Republican Cosponsors

Unaffiliated Cosponsors

Policy Area and Potential Impact of Bill HR 161

Primary Policy Focus

Environmental Protection

Alternate Title(s) of Bill HR 161

To amend sections 111, 169, and 171 of the Clean Air Act to clarify when a physical change in, or change in the method of operation of, a stationary source constitutes a modification or construction, and for other purposes.