The Department of Health and Human Services and the Environmental Protection Agency unveiled a coordinated effort to map, measure and remove microplastics and pharmaceutical contaminants from drinking water and human tissues, rolling out a major new research program, a draft contaminants list and human health benchmarks for hundreds of drugs. Officials described worrying new data showing plastics in organs and placentas, outlined an ambitious STOMP initiative to detect and clear microplastics from people, and set nonbinding benchmarks to help communities manage pharmaceutical pollution. The announcements were framed as a science-first push to protect public health and give local leaders tools to respond. Leaders said the plan pairs clinical testing goals with environmental monitoring for a coordinated response at the federal level.
At a joint briefing, HHS Secretary Robert F. Kennedy Jr. and EPA Administrator Lee Zeldin presented the case for urgent action after researchers reported plastics turning up across human tissues. Kennedy highlighted studies that detected plastic particles in blood, lungs, livers, kidneys and in every single sample of tested human placentas, driving home the message that exposure is widespread. “This is not a rare exposure, this is baseline,” Kennedy warned, noting that researchers have found plastic particles in human blood, lung tissue, livers, kidneys and in every single sample of tested human placentas. “We are not dealing with a distant or theoretical risk. We are dealing with a measurable and growing presence inside the human body. And the signal is getting stronger.”
Officials also pointed to alarming trends in brain concentrations, saying levels of plastics have surged in recent years and raising questions about long-term effects on cognition and health. He added that the concentration of plastics in the human brain has spiked by 50% since 2016, amounting to roughly “a spoonful of plastic in every human brain.” Those figures framed the effort as more than an environmental cleanup; it is a potential medical crisis with individual and population-level consequences.
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Kennedy and the panel noted a clinical study linking microplastics in arterial plaque to sharply worse outcomes, arguing that such signals require investigation and a clinical response. “We do not ignore signals like that,” he said. The administration responded by launching STOMP, the Systematic Targeting of Microplastics program, with funding estimated between $134 million and $144 million for research into detection, harm pathways and removal techniques.
STOMP aims to create fast, low-cost clinical tests and advance therapies or interventions that can reduce microplastic burden in people, according to agency leaders. Dr. Alicia Jackson, head of the Advanced Research Projects Agency for Health, said the program will push the field forward with accessible diagnostics. “STOMP will do, in five years, what the entire field has been unable to do for decades,” Jackson said. “… This field has been working in the dark long enough and STOMP turns on the lights.”
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On the environmental side, the EPA released a draft Sixth Contaminant Candidate List that brings microplastics and several other chemical groups into formal consideration for regulation and study. The new CCL includes 75 chemicals and four priority groups: microplastics, pharmaceuticals, PFAS and disinfection byproducts, along with nine microbes, signaling a broad attempt to catalog threats to drinking water quality. Zeldin framed the move as answering community concerns that went unanswered for too long.
“For too long, Americans have been ignored as they sound the alarm about plastics in their drinking water. That ends today,” Zeldin said. “By placing microplastics on the Contaminant Candidate List, for the first time ever, [the] EPA will follow the science, pursue answers and will hold ourselves to the highest standards to protect the health of Americans.”
Alongside the draft list, the EPA published human health benchmarks for nearly 400 pharmaceuticals that are known to, or could, appear in drinking water, covering antibiotics, antidepressants and hormones. Those benchmarks are not binding limits but are meant to help utilities and local officials prioritize testing and treatment options based on risk and local exposure profiles. The benchmarks give communities a tool for screening contamination and making decisions about investments in treatment systems.
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Experts at the briefing warned about the economic toll tied to plastic-related health problems, citing analyses that place costs in the hundreds of billions annually. Dr. Leonardo Trasande emphasized that even the limited chemical set we currently study already has a huge price tag on public health and medical spending. “Just from the few chemicals that we know about, the United States health care cost contribution of plastic exposure right now is $250 billion,” said Dr. Leonardo Trasande, a pediatrician and director at NYU Grossman School of Medicine. “1.2% of our gross domestic product goes out the window as a result of toxic exposures that derive from plastic. … We’re probably underestimating the scope of the problem.”
Republican leaders framed the announcements as practical, accountable steps: fund targeted research, produce usable tools for communities, and back decisions with data rather than fear. The combined HHS-EPA push aims to link clinical detection, environmental monitoring and practical benchmarks so towns and cities can make grounded choices about protecting water and public health. Officials say the coming months will focus on rolling out tests, refining the contaminant list and helping local officials interpret the new benchmarks.
