Ensuring States Control Soot Pollution

The U.S. EPA is responsible for crafting national air quality standards, but strong national standards don’t matter much if states don’t implement them effectively. Earthjustice won a critical victory that directs EPA to ensure its soot standards are stringently put in place at the state level.

Case Overview

Soot pollution from power plants, oil refineries and other industrial operations is a major killer—new national standards limiting soot pollution levels in our air could prevent up to 15,000 premature deaths every year.

But the life-saving power of these standards hinges on the stringency of measures that states take to reduce soot emissions in highly polluted areas. This process often breaks down because EPA’s directions for states tend to be weak and out of step with what the law requires. Such was the case with the agency’s rules to control deadly soot pollution.

Earthjustice sued to ensure that EPA requires states to take meaningful actions to cut soot. In January 2013, a federal court ruled for Earthjustice by requiring EPA to ensure stringent controls are placed on soot polluters in communities that have failed to attain health standards in a timely fashion, including installation of the best available pollution control technologies. This critical victory means that the benefits of EPA’s strong federal soot rule will carry over into states’ efforts to implement them, making the air safer to breathe for people who live in polluted areas nationwide.

A coal-fired power plant.
Soot pollution from power plants, oil refineries and other industrial operations is a major killer. (Chris Jordan-Bloch / Earthjustice)

Case Updates

July 21, 2026 In the News: San Francisco Chronicle

Trump administration illegally weakened air pollution protections, judge rules

Seth Johnson, Attorney, Washington, D.C., Office: “With all the pollution control technologies that already exist, as well as the ingenuity of American industry, there are plenty of ways to continue making progress and improving people’s lives.”

July 20, 2026 Press Release: Victory

Court Orders EPA to Implement National Soot Standard

Ruling sets February 2027 deadline for EPA to identify areas out of compliance with strengthened 2024 PM2.5 standard

July 17, 2026 document

Ruling: Court Orders EPA to Implement National Soot Standard

The U.S. District Court for the Northern District of California ruled on Friday, July 17, 2026 that the Environmental Protection Agency (EPA) must follow the law and implement the strengthened health-based 2024 National Ambient Air Quality Standard (NAAQS) for particulate matter (PM2.5) air pollution, commonly known as soot.