News & Analysis as of

MATS Clean Air Act

MG+M The Law Firm

EPA Moves to Repeal Biden–Harris-Era Power Plant Emissions Rules

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On June 11, 2025, the US Environmental Protection Agency, under Administrator Lee Zeldin, proposed repealing two key Biden–Harris-era rules targeting greenhouse gas and air toxic emissions from fossil fuel–fired power plants....more

Holland & Knight LLP

EPA Launches Comment Period on Power Plant Climate and Air Toxics Rules

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The U.S. Environmental Protection Agency (EPA) proposes to eliminate greenhouse gas regulations for power plants after concluding that power plants do not "contribute significantly" to dangerous air pollution or,...more

Jones Day

EPA Proposes Repeal of 2024 Mercury and Air Toxics Standards Amendments

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On June 11, 2025, the U.S. Environmental Protection Agency ("EPA") announced a proposed rule to repeal key amendments to the 2024 Mercury and Air Toxics Standards ("MATS") for coal- and oil-fired electric utility steam...more

Holland & Knight LLP

EPA Proposes Significant Budget Reduction for Fiscal Year 2026

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The U.S. Environmental Protection Agency's (EPA) budget proposal for fiscal year (FY) 2026 fundamentally reimagines the federal government's role in environmental policy and regulation. If enacted by Congress, EPA's budget...more

Holland & Knight LLP

President Trump Invokes National Security to Delay Mercury and Air Toxics Standards

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President Donald Trump's April 8, 2025, proclamation extends the compliance deadline for the EPA's Mercury and Air Toxics Standards (MATS) by two years, from July 8, 2027 to July 8, 2029, asserting national security concerns...more

WilmerHale

EPA and DOI Regulatory Roundup: Air Toxics and Carbon, Coal Ash, Wastewater, Methane, and Offshore Wind

WilmerHale on

The Biden-Harris Administration recently issued a suite of new rules aimed at addressing water and air quality, reducing methane emissions, protecting environmental justice communities, and accelerating the nation’s...more

Jones Day

EPA Proposes Stricter Mercury and Air Toxics Standards for Power Plants

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The Environmental Protection Agency ("EPA") has announced a new proposed rule that would strengthen the National Emission Standards for Hazardous Air Pollutants ("NESHAP") for Coal- and Oil- Fired Electric Utility Steam...more

Foley Hoag LLP - Environmental Law

Will We Ever Stop Overestimating the Cost of Complying with Environmental Regulations?

Earlier this week, Greenwire (subscription required) had an interesting story about the role that EPA’s estimate of the cost to comply with the Mercury and Air Toxics Standards rule played in the politics and judicial review...more

(ACOEL) | American College of Environmental...

When is risk reduction not a benefit?

EPA filed a status report on October 15 in the slow-moving mercury and air toxics (MATS) litigation, which is now Murray Energy Corp. v. EPA, No. 16-1127 (D.C. Cir., filed April 26, 2016). The case is a challenge to EPA...more

WilmerHale

Climate Change Revisions Lead to an Uncertain Regulatory Environment

WilmerHale on

This is the second issue of WilmerHale’s 10-in-10 Hot Topics in Energy Series. Over the next 10 weeks, our attorneys will share insights on current and emerging issues affecting the US energy sector. Attorneys from across...more

Jackson Walker

Trying to Thread a Very Fine—and Possibly Non-Existent—Needle: EPA Proposes to Withdraw a Necessary Underpinning of the Mercury...

Jackson Walker on

In December 2011, the EPA announced the Mercury and Air Toxics Standards under Section 112 of the Clean Air Act (CAA), commonly referred to as the MATS rule. The MATS rule governs the emission of mercury from electric power...more

Burr & Forman

EPA Proposes Revising Mercury and Air Toxics Standards for Power Plants

Burr & Forman on

On December 27, EPA proposed to revise the cost finding associated with the Mercury and Air Toxics Standards (MATS) along with the risk and technology review required by the Clean Air Act. (EPA Announcement)....more

Mitchell, Williams, Selig, Gates & Woodyard,...

Mercury and Air Toxics Standards: U.S. Senator Carper Letter to U.S. Environmental Protection Agency

United States Senator Tom Carper (D-Del.) sent a December 13th letter to the U.S. Environmental Protection Agency (“EPA”) Office of Information and Regulatory Affairs: . . . expressing grave concerns regarding the...more

Jones Day

EPA Offers ACE Rule to Trump Clean Power Plan

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Outlined in an Environmental Protection Agency ("EPA") proposal published on August 31, 2018, the Affordable Clean Energy ("ACE") rule would replace the Obama Administration's Clean Power Plan ("CPP"). A 60-day public comment...more

Mitchell, Williams, Selig, Gates & Woodyard,...

Electric Power Supply/Service Agreements: Federal Court Addresses Procedural Motion in Regards to Electric Cooperatives Challenge...

Washington-St. Tammany Electric Cooperative, Inc. and other non-profit electric cooperative corporations (collectively “Co-ops”) filed a breach of contract action (“Complaint”) on June 28th against Louisiana Generating,...more

Williams Mullen

Mercury Rule Moves Forward

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The federal lawsuit filed by twenty-three states challenging EPA’s Mercury and Air Toxics Standards (MATS) is in the 8th inning, and things are not looking good for the challengers. Some background is appropriate. ...more

Williams Mullen

Environmental Notes - July 2016

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CONGRESS FINDS THE FORMULA TO REFORM CHEMICAL REGULATION - The Toxic Substance Control Act (TSCA) is the primary federal law by which the manufacture, import and use of chemical substances are regulated in the United...more

Foley Hoag LLP - Environmental Law

Stop the Presses! EPA Still Thinks that the MATS Rule Is a Good Idea

Last week, EPA issued its “Supplemental Finding”, confirming that it still believes that its Mercury and Air Toxics Standards are “appropriate and necessary.” I don’t have much to add to our post at the time of the proposed...more

Foley Hoag LLP - Environmental Law

EPA Continues to Dismantle Clean Air Act Affirmative Defenses — Blame It On the Judge(s)

On Wednesday, EPA published certain amendments to the Mercury and Air Toxics Standards in the Federal Register. EPA describes most of the changes as “technical corrections,” but there is one important substantive change. ...more

Kilpatrick

The EPA Gets a First Big Win at the Supreme Court in the Post-Scalia Era

Kilpatrick on

On March 3, 2016 the Supreme Court denied an application by Michigan Attorney General Bill Schuette and several other states for a stay of the Environmental Protection Agency’s Mercury and Air Toxics Standards (“MATS”) – a...more

McGuireWoods LLP

Something in the Air at the EPA: The McGuireWoods 2016 Clean Air Act (P)review

McGuireWoods LLP on

Even in this election year, the Obama administration is moving forward with its Clean Air Act (CAA) agenda. While the Environmental Protection Agency’s (EPA’s) final Clean Air Act 111(d) rule for cutting greenhouse gas...more

K&L Gates LLP

High Court Grants Stay of Clean Power Plan

K&L Gates LLP on

On February 9, 2016, in an historic and unprecedented decision, the U.S. Supreme Court blocked the U.S. Environmental Protection Agency (“EPA”) from implementing the Clean Power Plan (“CPP”) while the rule is challenged in...more

Akin Gump Strauss Hauer & Feld LLP

Update on Environmental Regulations Impacting the Power Sector – Litigation May Create Uncertainty

As the electric power industry considers the options for compliance with an unprecedented suite of new environmental requirements, it faces continued uncertainty as to the fate of some of the most significant new regulations....more

Foley Hoag LLP - Environmental Law

Obama’s Climate Action Plan: Next Step, Landfill Methane

Having gotten the Clean Power Plan out the door, EPA has moved on to another target of President Obama’s Climate Action Plan: landfill methane emissions. Late last week, EPA proposed both new emission guidelines for...more

Faegre Drinker Biddle & Reath LLP

Clean Power Plan Finalized by Obama Administration and EPA — What's Next?

On August 3, 2015, President Obama and the Environmental Protection Agency (EPA) released a new set of final regulations aimed at reducing carbon output from power plants. The sweeping new Clean Power Plan (CPP) sets limits...more

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