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

Deadly fine particulate matter, also known as soot, is caused by pollution from tailpipes, smokestacks and industrial power plants.
April 14, 2026 Press Release

Coalition Sues Trump EPA for Failure to Implement Life-Saving National Soot Standard

EPA fails to implement its own strengthened air quality standard and missed deadline for identifying areas with soot pollution levels higher than the new acceptable limit

April 14, 2026 document

Motion for Summary Judgment: NAAQS Soot Standard

Seventeen health, community and environmental groups filed a lawsuit against the Environmental Protection Agency for failing to implement the strengthened 2024 National Ambient Air Quality Standard (NAAQS) for soot. The coalition also filed a motion for summary judgment asking the court to put the agency on a court-ordered deadline to carry out its overdue responsibility.

April 14, 2026 document

Lawsuit filing for EPA Failing to Implement NAAQS Soot Standard

Seventeen health, community and environmental groups filed a lawsuit in the U.S. District Court for the Northern District of California against the Environmental Protection Agency for failing to implement the strengthened 2024 National Ambient Air Quality Standard (NAAQS) for particulate matter air pollution, commonly known as soot.