Tenure
On January 29, Supreme Court Justice Brett Kavanaugh swore Zeldin into office as the 17th administrator of the Environmental Protection Agency. In March 2025, Zeldin presented what he described as the "largest deregulatory announcement in U.S. history" for the agency to do "its part to usher in a golden age of American success" by halting and rolling back actions of the previous administration. Staffing the senior leadership with former industry lobbyists, the agency announced plans to cut agency jobs, eliminate its scientific research arm, and reduce the EPA's budget by 65%.
In February 2025, the administration terminated the Environmental and Climate Justice Block Grant Program. In June 2026, district judge Richard Gergel ruled that the terminations were unlawful and in July 2026 a federal judge ordered the program's remaining $2.8 billion in funds be distributed.
During his tenure at the EPA, Zeldin has pushed for substantial environmental deregulation, including going after rules aimed at cutting emissions from power plants, preventing pollution of waterways, and Biden-era restrictions on chemicals.
In March 2025, the Climate United Fund, a nonprofit that was awarded nearly $7 billion by the Biden administration to finance energy and climate projects, sued the EPA, accusing it of improperly freezing a grant.
In March 2025, the EPA informed coal and oil-burning power plants that they could potentially bypass environmental restrictions by sending an email to the agency requesting an exemption. By April 15, nearly 70 coal power plants were exempted. Zeldin also said that he would allow coal-burning power plants to apply for exemptions for coal ash pollution. The New Yorker wrote that the EPA under Zeldin "has come out officially, if astonishingly, as pro-coal".
In May 2025, the EPA rolled back limits on forever chemicals in drinking water. Zeldin stated that the EPA was dedicated to protecting Americans from forever chemicals in drinking water, but that the agency also wanted "common-sense flexibility in the form of additional time for compliance". In July 2025, Zeldin announced the closure of the EPA's Office of Research and Development.
As EPA head, Zeldin has described concerns about global warming as a "religion" and efforts to combat it as a "scam." In July 2025, Zeldin announced a repeal of the endangerment finding, which declares greenhouse gases a public health threat and which forms the basis of the government's legal authority to act on climate change. Zeldin described this as "the largest act of deregulation in the history of the United States". The formal process of repealing the endangerment finding was finalized by President Donald Trump on February 12, 2026.
In July 2025, Zeldin and Mexican Environment Minister Alicia Barcena announced an agreement aimed at a permanent solution to the problem of sewage entering the Tijuana River from Mexico and contaminating the Pacific Ocean across the border near San Diego.
In April 2026, he was reportedly being considered as the next nominee for United States attorney general.