EPA, HHS Announce Historic Actions to Protect Americans from Microplastics and Safeguard Drinking Water
Joint initiative marks first-ever inclusion of microplastics on EPA's Contaminant Candidate List and launches groundbreaking ARPA-H program to detect and remove plastics from the human body
April 2, 2026
Contact Information: EPA Press Office (press@epa.gov)
WASHINGTON – U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin and U.S. Department of Health and Human Services (HHS) Secretary Robert F. Kennedy Jr. today announced landmark, coordinated actions to address microplastics contamination, one of the most urgent and growing public health challenges facing Americans. The announcements, made at a press conference at EPA headquarters, represent a major step forward in President Trump's commitment to Make America Healthy Again.
For the first time in the program's history, EPA is including microplastics as a priority contaminant group in its draft Sixth Contaminant Candidate List (CCL 6), now open for public comment. CCL 6 also includes pharmaceuticals as a group—another first—along with per- and polyfluoroalkyl substances (PFAS), disinfection byproducts, 75 individual chemicals, and nine microbes that may be present in public drinking water systems.
The CCL is a critical tool under the Safe Drinking Water Act (SDWA) that drives research, funding, and future decisions on regulating emerging threats to drinking water. By elevating microplastics and pharmaceuticals to priority group status, EPA is directly responding to the concerns of millions of Americans who have long demanded greater transparency and accountability about what is in their water.
Additionally, the Advanced Research Projects Agency for Health (ARPA-H) announced the launch of STOMP—Systematic Targeting of Microplastics—a first-of-its-kind nationwide initiative to build a comprehensive toolbox for measuring, researching, and removing microplastics and nanoplastics (MNPs) from the human body. STOMP takes a three-pronged approach:
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Measure: Deploy gold-standard detection technology to accurately quantify microplastics levels in water and human tissue.
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Target: Identify the most harmful plastic contaminants and determine how they enter and move through the body.
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Remove: Develop and validate methods to eliminate microplastics from the human body.
Together, these two initiatives represent the most comprehensive federal effort to date to understand and combat the risks posed by microplastics to public health.
"For too long, Americans have vocalized concerns about plastics and pharmaceuticals in their drinking water. That ends today,” said EPA Administrator Lee Zeldin. “By placing microplastics and pharmaceuticals on the Contaminant Candidate List for the first time ever, EPA is sending a clear message: we will follow the science, we will pursue answers, and we will hold ourselves to the highest standards to protect the health of every American family.”
“Today, HHS and EPA are taking decisive action to confront microplastics as a growing threat to human health,” said HHS Secretary Robert F. Kennedy, Jr. “Americans deserve clear answers about how microplastics in their bodies affect their health. Through ARPA-H’s STOMP program, we will measure microplastic exposure, identify sources of risk, and develop targeted solutions to reduce it.”
The announcements were unveiled at EPA headquarters in Washington, D.C., where Administrator Zeldin and Secretary Kennedy were joined by senior agency officials for a press conference before the public. The press conference was followed by an expert panel discussion examining the scope of microplastics and pharmaceutical contamination in America’s drinking water and the real-world impact of today's actions.
Panelists included EPA Assistant Administrator for the Office of Water Jessica Kramer; ARPA-H Director Dr. Alicia Jackson; leading microplastics researcher Dr. Marcus Eriksen; scientist Matthew Campen, whose research has documented the presence of microplastics in human tissue; Dr. Sherri A. Mason, a leader in studying the prevalence and impact of plastic pollution within freshwater ecosystems; and Carsten Prasse, an associate professor of environmental health and engineering at Johns Hopkins focused on the occurrence and fate of organic contaminants in the urban water cycle and their impact on environmental and human health.
Background
The CCL is published every five years under the SDWA and guides EPA's research priorities, funding decisions, and regulatory agenda for substances not yet subject to national drinking water standards. Inclusion on the CCL does not constitute regulation, but signals that a substance warrants serious scientific attention and may be considered for future regulatory action.
Learn more about CCL 6 and STOMP.
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