EPA Proposes First-Time Listing of Microplastics and Pharmaceuticals as Drinking Water Contaminants
The Environmental Protection Agency (EPA) announced a significant proposal on Thursday to include microplastics and pharmaceuticals on its list of contaminants in drinking water for the first time. This move marks a pivotal step that could eventually result in new regulatory limits on these substances for water utilities across the United States.
Responding to Public Health Concerns
EPA Administrator Lee Zeldin stated that the agency is addressing widespread worries among Americans regarding the presence of plastics and pharmaceuticals in their drinking water. This initiative also aligns with efforts to support Health Secretary Robert F. Kennedy Jr.'s MAHA movement, which has been advocating for stricter environmental contaminant controls for months.
The EPA’s Contaminant Candidate List identifies contaminants not currently regulated under the Safe Drinking Water Act. The agency has released a draft of the sixth version of this list, initiating a 60-day public comment period, with plans to finalize it by mid-November.
Health Implications and Scientific Research
Recent studies have highlighted the prevalence of microplastics in drinking water and even within human organs such as hearts, brains, and testicles. While doctors and scientists are still evaluating the full health impacts, there is growing consensus that these findings warrant serious concern. Additionally, pharmaceuticals entering the water supply through human excretion and inadequate wastewater treatment are becoming an increasing worry.
The EPA utilizes this list to prioritize research, funding, and regulatory decisions, though it rarely moves pollutants from the list to establish enforceable limits in public drinking water. In March, the agency announced it would not develop regulations for any of the nine pollutants from its most recent examination, underscoring the lengthy and often inconclusive nature of this process.
Mixed Reactions from Environmental Advocates
Erik Olson, a senior attorney at the Natural Resources Defense Council, noted that this proposal is merely the beginning of a protracted process that frequently results in no action. However, some environmentalists view the announcement as a positive initial step. Judith Enck, a former EPA regional administrator now leading Beyond Plastics, emphasized that inclusion on the list is crucial for eventual regulation of microplastics in water supplies.
Dr. Philip Landrigan, director of the Global Observatory on Planetary Health at Boston College, cautioned that without curbing the rapid growth in plastic production, the EPA's efforts may have limited impact. The United States is engaged in global treaty talks on plastic pollution but opposes production limits, highlighting ongoing challenges.
MAHA Movement and Broader Environmental Agenda
The joint effort by Kennedy and Zeldin comes as MAHA activists have formed tentative alliances with the EPA while expressing frustration over stalled actions on key priorities like pesticide regulation. The movement gained momentum earlier this year following an executive order from President Donald Trump aimed at increasing production of glyphosate, a controversial herbicide ingredient.
The EPA has hinted at an upcoming MAHA agenda focusing on issues such as forever chemicals, plastic pollution, food quality, Superfund cleanups, and lead pipes, with press secretary Brigit Hirsch indicating in February that it is in its final stages.
Regulatory Context and Historical Precedents
Under the Safe Drinking Water Act, amended in 1996, the EPA is required to publish the Contaminant Candidate List every five years and decide whether to regulate at least five contaminants from it. Historically, the agency has determined that no regulatory action is necessary for most contaminants considered in previous cycles.
This proposal contrasts with recent environmental policy shifts, such as the EPA's May announcement to rescind limits on certain forever chemicals, a move environmental groups are contesting to preserve Biden-era standards.
The new draft list includes four contaminant groups—microplastics, pharmaceuticals, PFAS, and disinfection byproducts—along with 75 chemicals and nine microbes potentially found in drinking water, according to the EPA.
