New Source Review Permitting Improvement Act
Latest action. Placed on the Union Calendar, Calendar No. 542.
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.
Written by analysts at the Congressional Research Service and published on Congress.gov, not by Civibrief. Summarized at the "Introduced in House" stage on January 3, 2025. It describes the bill, it is not the legal text.
Where is it in the process, and what happens next?
4 steps remain before this bill could become law.
The record's latest action, on April 28, 2026: Placed on the Union Calendar, Calendar No. 542.
- Clearing the committees it was referred to, and being scheduled for a floor vote
- Passage by the House
- Passage by the Senate
- The President's signature. If the President vetoes it, two-thirds of both chambers must vote to override.
How likely is it to become law?
Civibrief does not forecast outcomes and this page has no opinion about this one. What the record supports is a base rate, which is a fact about the whole pile, not a prediction about this measure.
In the 118th Congress (2023-24), 274 of the 16,565 bills and joint resolutions introduced became law, about 1.7 percent. That count covers every measure at every stage, including the many that never left committee.
This one is not there yet: 4 steps are still outstanding, listed above.
Has anyone actually voted on it?
No. No roll call in this Congress cites this measure. That is the ordinary outcome: most measures never reach a recorded floor vote, and a committee ends most of them simply by not acting.
A vote is not the only thing that happens to a measure. Hearings, markups, and referrals are all recorded actions, and none of them is a vote of the full chamber.
Who is behind it?
H. Griffith (R-VA) introduced it on January 3, 2025, and 21 members have since signed on as cosponsors.
They are 21 Republicans.
Cosponsoring is a formal signature on the text. It is not a commitment to vote for the measure, it does not bind anyone's party, and a long list of cosponsors is a measure of attention rather than of prospects.
How long has it been in play?
It was introduced on January 3, 2025, 615 days ago. The most recent recorded action was 135 days ago, on April 28, 2026.
Measures do not carry over. Anything the 119th Congress has not finished by January 3, 2027 dies when the term ends, and has to be introduced again from the start in the next Congress.
Every answer above is assembled from this measure's own record on Congress.gov and from published counts of what Congress has passed before. Civibrief does not predict outcomes and takes no position on any measure.
Vote history
- HouseIn committee, no floor vote yet
- SenateAwaits House passage
- PresidentAwaits both chambers