Environmental Groups Sue EPA Administrator Zeldin Over Missing Air Pollution Designations

The lawsuit, filed by groups including the Sierra Club, American Lung Association, and Natural Resources Defense Council, targets Zeldin's failure to designate areas as meeting or not meeting strengthened particulate matter standards that EPA adopted in February 2024. The new standards lowered the annual limit for PM2.5 pollution from 12.0 to 9.0 micrograms per cubic meter, based on what EPA called 'substantial scientific evidence' linking the pollution to cardiovascular disease, respiratory disease, cancer, and premature death.

Under the Clean Air Act, EPA had until February 7, 2026—exactly two years after adopting the new standard—to officially designate all areas of the country as either meeting or violating the pollution limits. But as the complaint notes, 'As of the date of this filing, the Administrator has not promulgated a single designation under the 2024 standard for any area.' The groups argue this violates EPA's 'non-discretionary duty' under the statute.

The plaintiffs emphasize the public health stakes, noting that 'More than 75 million of the roughly 335 million people in the United States live in the hundreds of counties where the most recent official EPA data reveals that PM2.5 pollution levels violate the 2024 standard, including urban areas like Atlanta, Charlotte, Cincinnati, Los Angeles, Pittsburgh, and San Jose.' EPA had estimated the strengthened standards would yield up to $46 billion in net benefits, including 'up to 4,500 avoided premature deaths, 800,000 avoided cases of asthma symptoms, and 290,000 avoided lost workdays.'

The designation process is crucial because it triggers mandatory pollution controls. Areas designated as 'nonattainment' must adopt state implementation plans with specific emission reduction measures, while new factories and power plants face stricter permitting requirements. The groups note that 45 states, D.C., Puerto Rico, the U.S. Virgin Islands, and three tribes submitted designation recommendations to EPA, but Zeldin has taken no action on any of them.

The environmental groups argue Zeldin's inaction harms their members who live in polluted areas and prevents them from accessing legal protections. 'EPA's unlawful refusal to take this nondiscretionary action is depriving communities across the country of the Clean Air Act's most fundamental protections,' the complaint states. The groups also note that the scientific evidence shows 'health effects can occur over the entire distribution of ambient PM2.5 concentrations evaluated,' meaning there is no safe threshold below which the pollution doesn't cause harm.

This case represents a significant challenge to EPA's implementation of air quality standards under the new administration. The lawsuit seeks declaratory judgment that Zeldin violated the Clean Air Act and an injunction requiring immediate action on the designations. The strengthened PM2.5 standards were based partly on 'strong evidence' of 'racial and ethnic disparities in PM2.5 exposures,' with EPA finding that health risk disparities persist even at lower pollution levels.

The case will test whether courts will force EPA to meet statutory deadlines for pollution designations when the agency appears to be dragging its feet. The Clean Air Act specifically authorizes citizen suits to compel EPA to perform non-discretionary duties, and the two-year deadline for designations contains limited exceptions only when EPA has 'insufficient information'—a claim the agency has not made here.