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Clean Air

EELP advises stakeholders on regulatory design questions to support the development and implementation of strong federal clean air rules.

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  • Regulatory Tracker

Corporate Average Fuel Economy Penalties

In July 2025, Congress eliminated the Corporate Average Fuel Economy civil penalties, resetting penalties to $0.00.

July 4, 2025

Corporate Average Fuel Economy Penalties
  • Legal Analysis
  • Quick Takes

Quick Take: Diamond Alternative Energy v. EPA

A look at the decision, how this case ended up in the Supreme Court, and how California’s vehicle standards work.

June 27, 2025

Quick Take: Diamond Alternative Energy v. EPA
  • Legal Analysis

EPA Proposes to Eliminate Power Sector Greenhouse Gas Emissions Regulations

We look at the inconsistent arguments within the proposal and discuss the potential legal risks if EPA were to finalize a rule consistent with the proposal.

June 23, 2025

EPA Proposes to Eliminate Power Sector Greenhouse Gas Emissions Regulations
  • EELP News
  • Legal Analysis

Trump Administration’s Proposed Repeal of the 2024 Updates to the Mercury and Air Toxics Standards (MATS)

Analysis of the proposed repeal, including impacts to public health, use of continuous monitoring systems, the mercury emission standard, and more.

June 20, 2025

Trump Administration’s Proposed Repeal of the 2024 Updates to the Mercury and Air Toxics Standards (MATS)
  • Legal Analysis

Ethylene Oxide Emissions Standards for Commercial Sterilization Facilities

A summary of EPA’s EtO final rule for sterilization facilities and the significance of regulating EtO emissions for fenceline communities, plus a look at current litigation and the anticipated effort to roll it back.

May 28, 2025

Ethylene Oxide Emissions Standards for Commercial Sterilization Facilities
  • Regulatory Tracker

National Ambient Air Quality Standards (NAAQS) for Ozone

On March 12, 2025, EPA announced a reconsideration of the NAAQS.

May 1, 2025

National Ambient Air Quality Standards (NAAQS) for Ozone
  • Regulatory Tracker

Petroleum Refinery Sector Rule (NESHAPs / NSPS)

The Biden EPA amended the 2015 standards for refineries. On Mar. 12, the Trump administration slated these standards for rollback.

April 10, 2025

Petroleum Refinery Sector Rule (NESHAPs / NSPS)
  • Legal Analysis

Clean Fuel Standard Directed Benefit Mechanisms to Promote Equity

New paper co-authored by Abby Husselbee looks at how CFS programs could be designed to direct public health, mobility, and economic benefits.

April 3, 2025

Clean Fuel Standard Directed Benefit Mechanisms to Promote Equity
  • Regulatory Tracker

National Ambient Air Quality Standards (NAAQS) Review

EPA sets NAAQS for six common and harmful pollutants: carbon monoxide, lead, PM, ozone, nitrogen dioxide, and sulfur dioxide.

March 12, 2025

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