Administrator Zeldin Announces Selection of Members to the Clean Air Scientific Advisory Committee
WASHINGTON – Today, U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin announced the selection of new members to the Clean Air Scientific Advisory Committee (CASAC). The well-qualified experts from a broad range of scientific disciplines bring the experience and expertise needed to provide Gold Standard scientific advice to EPA leadership as they advance the agency’s core mission of protecting human health and the environment.
“The Trump EPA has an unwavering commitment to Gold Standard Science. Reconstituting the Clean Air Scientific Advisory Committee will provide rigorous, independent, evidence-based, scientific advice consistent with its legal obligations to advance our core mission of protecting human health and the environment,” said EPA Administrator Zeldin. “The new CASAC members will help inform any actions to retain or revise the National Ambient Air Quality Standards, which will advance our efforts to provide clean air to every American. Additionally, to ensure our state co-regulators have a stronger voice at EPA, I am appointing two members from state air pollution control agencies for the first time in years.”
The newly appointed CASAC will consist of a chair and six new members. CASAC members serve a two-year term from 2026 through 2028.
Chair – Dr. Louis Anthony (Tony) Cox, Jr., Cox Associates, LLC
Members
Dr. Brian Joondeph, Colorado Retina Associates, PC
Dr. Fotios-Christos Kafantaris, Indiana Department of Environmental Management
Ms. Katherine Kistler, Nucor Corporation
Dr. Sabine Lange, Texas Commission on Environmental Quality
Dr. Sidney Marlborough, Orion Engineered Carbons LLC
Dr. Stanley Young, CGStat
Background
The CASAC was established under the Clean Air Act Amendments of 1977 and provides independent advice to the EPA Administrator on the technical bases for EPA's National Ambient Air Quality Standards.
Similar to the last Administration and in line with typical processes for renewal of Federal Advisory Committees at the agency, the Trump EPA renewed the charter for the CASAC on August 11, 2025, and opened the process of soliciting candidate nominations from the public on May 1, 2025.
For further information on the CASAC, visit the CASAC website.