Clean Air Act

News & Analysis as of

President Obama, EPA Announce Final Clean Power Plan to Regulate Power Plant Emissions Connected to Climate Change

President Obama and the U.S. Environmental Protection Agency (EPA) today announced the issuance of the long-anticipated Federal Clean Power Plan, which regulates emission to the atmosphere of carbon dioxide (CO2) from...more

EPA Ordered to Revise CSAPR Emissions Budgets

On July 28, the U.S. Court of Appeals for the D.C. Circuit ordered the U.S. Environmental Protection Agency (EPA) to revise emissions budgets for several states under the agency’s Cross-State Air Pollution Rule (CSAPR or the...more

The D.C. Circuit Sends EPA Back to the Drawing Board to Fix Its Transport Rule Emissions Budgets

The Clean Air Act’s good neighbor provision prohibits upwind states from emitting air pollutants in amounts that will “contribute significantly to nonattainment” of a national ambient air quality standard in a downwind state....more

Top 6 at 6 - Climate Change Legal Highlights of the First Six Months of 2015

Some might say that the Clean Power Plan is all one needs to talk about in any highlights article on recent climate change legal issues. When final the CPP will expand the scope of the Clean Air Act profoundly, impact the...more

Changes Likely in Final Version of EPA's Clean Power Plan

EPA's rules regulating greenhouse gas emissions from power plants are expected to be finalized by the end of the summer. It has been nearly two years since the EPA unveiled its proposed greenhouse gas emissions standards...more

Two Strikes and Oklahoma’s Out (For Now): Another Challenge to the Clean Power Plan Is Rejected

On Friday, Judge Claire Eagan dismissed Oklahoma’s latest challenge to EPA’s Clean Power Plan. Yes, that plan. The one that hasn’t been promulgated yet....more

EPA nixes state exemptions on excess CAA emissions

Affirmative defenses commonly relied upon by facility operators to avoid civil and administrative penalties for violations of air emissions limitations during periods of facility startup, shutdown or malfunction (“SSM”) may...more

EPA Oil and Gas GHG and Source Aggregation Rules Coming Soon

Soon the Environmental Protection Agency will propose greenhouse gas (GHG) regulations for the oil and gas industry sector. The White House Office of Management & Budget (OMB) has begun formal review of an EPA proposal to cut...more

Supreme Court Rejects EPA Mercury Emissions Rule

On June 29, 2015, the Supreme Court cast serious doubt upon the future of the Mercury and Air Toxics Standards (“MATS”) by finding that the Environmental Protection Agency (“EPA”) failed to adequately consider the costs of...more

EPA Must Consider Costs in Deciding Whether to Regulate HAPs From Power Plants

Last week, in Michigan v. EPA, the U.S. Supreme Court held that it was unreasonable for the U.S. Environmental Protection Agency (“EPA”) to refuse to consider costs in connection with its finding that it was “appropriate and...more

Supreme Court Ruling on EPA Mercury Rule: Utilities Wins the Battle, But Lose the War

The Clean Air Act requires EPA to regulate emissions of hazardous air pollutants from coal-fired power plants if the agency determines that such “regulation is appropriate and necessary” after studying the hazards the...more

MATS is Dead, Long Live MATS – the Michigan v. EPA Decision

On June 29th the Supreme Court issued a much-anticipated opinion on the Environmental Protection Agency’s (EPA) Mercury and Air Toxics Standards (MATS). The decision faulted EPA for not considering the costs of the standards...more

MATS attack: Supreme Court reversal of EPA's Air Toxics Rule signals difficulties ahead

On June 29, 2015, the US Supreme Court, in a 5-4 decision, reversed and remanded to the DC Circuit EPA's Mercury and Air Toxics Standards rule (MATS). Michigan v. EPA, No. 14-46. MATS is a signature regulation of the Obama...more

The U.S. Supreme Court Holds EPA Must Consider Costs in Deciding to Regulate Power Plants

The U.S. Supreme Court’s June 29th decision in Michigan v. EPA, taken together with another significant CAA opinion from last term, Utility Air Regulatory Group v. EPA, demonstrates the Court’s proclivity for subjecting...more

Back to the Drawing Board: Supreme Court Sets Aside EPA Regulations On Mercury Emissions from Power Plants

The Supreme Court on Monday dealt a setback to the Environmental Protection Agency’s regulation limiting mercury and other toxic emissions from power plants – the “mercury rule.” In Michigan v. Environmental Protection...more

California Environmental Law & Policy Update - July 2015

Environmental and Policy Focus - BP pays record $18.7 billion to settle claims in Gulf oil spill Bloomberg - Jul 2: BP Plc reached a record $18.7 billion agreement to settle all federal and state claims from the 2010...more

Supreme Court Strikes Down EPA’s Mercury and Air Toxics Standard

Delivering a sharp blow to President Obama’s efforts to regulate coal plants, the U.S. Supreme Court invalidated the Environmental Protection Agency’s (EPA’s) 2012 Mercury and Air Toxics Standards (MATS) rule, finding that...more

Because EPA Failed to Consider Costs to Industry, Supreme Court Overturns Power Plant Regulation

The Mercury and Air Toxics Standards rule ("MATS") for electric utility steam generating units has been reversed and remanded with the Supreme Court’s much-anticipated decision in Michigan v. EPA on June 29, 2015. Writing for...more

Supreme Court Decision Could Limit EPA's Authority Over Greenhouse Gas Emissions

On June 29, 2015, the U.S. Supreme Court delivered another warning to the Environmental Protection Agency (EPA) against overstepping its statutory authority under the Clean Air Act. In Michigan v. Environmental Protection...more

Supreme Court Rejects EPA's Rule Regulating Hazardous Air Polluntants from Power Plants

On June 29, the U.S. Supreme Court held that the Environmental Protection Agency (EPA) was wrong not to consider the cost of compliance when it decided to regulate mercury and other air toxic substances emitted from power...more

The U.S. Supreme Court Invalidates EPA's Power Plant Mercury Emissions Regulation

On June 29, 2015, the U.S. Supreme Court in Michigan v. Environmental Protection Agency invalidated the U.S. Environmental Protection Agency's Mercury and Toxic Air Standards (MATS) regulation by a 5 to 4 vote, finding that...more

The Supreme Court Strikes Down the Mercury and Air Toxics Standards

While the Court’s decision marks a symbolic defeat for EPA, it may not significantly alter power plant operators’ compliance efforts. In a much anticipated decision delivered on the last day of the term, the Supreme...more

Considerable Costs—Supreme Court Requires EPA to Consider Cost Impacts of Power Plant Toxic Emissions Rules

A closely divided Supreme Court has determined that EPA must consider cost when regulating emissions of hazardous air pollutants from stationary sources. Under the Clean Air Act, EPA has authority to regulate toxic emissions...more

Energy & Environment Update - June 2015 #5

In This Issue: - Energy and Climate - Congress - Administration - Department of Energy - Department of Interior - Department of State - Department of Transportation -...more

Supreme Court Rejects EPA Rulemaking Process for Power Plant Emissions Standards

The US Supreme Court held yesterday that the US Environmental Protection Agency (EPA) unreasonably failed to consider costs when it made the initial decision to regulate emissions of hazardous air pollutants from power...more

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