On March 12, 2025, EPA issued a summary press release and 24 specific announcements “in the greatest and most consequential day of deregulation in U.S. history…” Notably, EPA said it was “driving a dagger straight into the heart of the climate change religion…”

Many of the specific announcements refer to “reconsideration” of previously issued regulations. EPA is generally not allowed to revoke or change existing regulations without completing its administrative procedures; these include notice of the proposed changes and opportunity for public comment on the proposals.

Some Actions Are Immediately Effective.
The actions taking immediate effect include terminating environmental justice and DEI programs within EPA, extending the no-action assurance for North Carolina to allow use of large air curtain incinerators to clear hurricane debris, and approval of changes to the Texas State Implementation Plan (SIP) to address air quality in the San Antonio area.

EPA said “it will soon release guidance to increase flexibility on NAAQS implementation, reforms to New Source Review, and direction on permitting obligations” relating to particulate matter (PM2.5). Also, EPA committed to resolve the large backlog of SIPs awaiting EPA approval.

Actions Requiring Administrative Procedures
Many of the announced actions require formal administrative rulemaking procedures. Key regulations under reconsideration are:

• Wastewater and air emission regulations for oil and gas production.
• Electric vehicle mandate.
• Greenhouse gas reporting.
• Endangerment Finding on vehicle emissions.
• Climate measurement (social cost of carbon).
• Regional Haze.
• Coal ash.
• Emission standards for several hazardous air pollutants.
• Clean Power Plan 2.0.
• Risk Management Plans.

To see the summary press release https://www.epa.gov/newsreleases/epa-launches-biggest-deregulatory-action-us-history

The specific announcements are at https://www.epa.gov/newsreleases/search