EPA Announces New Action to Make America Healthy Again by Collecting Data to Advance Science on Potential Drinking Water Contaminants

EPA Announces New Action to Make America Healthy Again by Collecting Data to Advance Science on Potential Drinking Water Contaminants

June 26, 2026

WASHINGTON - U.S. Environmental Protection Agency (EPA) is taking a key step to advance Safe Drinking Water Act implementation by proposing to monitor contaminants that are not currently regulated but may be present in drinking water. Specifically, the agency is proposing monitoring requirements for 30 unregulated contaminants in the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6).

"Across the country, Americans have concerns about exposure to unregulated chemicals in their drinking water, and the Trump EPA is ensuring these concerns are addressed with gold standard science," said EPA Assistant Administrator for the Office of Water Jessica Kramer. "The information we collect through this important monitoring effort will inform the agency's future decisions to protect drinking water for Americans nationwide."

The Safe Drinking Water Act requires that once every five years, EPA issue a list of unregulated contaminants to be monitored by public water systems called the Unregulated Contaminant Monitoring Rule (UCMR). By gathering nationwide data on these contaminants, EPA and the public learn more about their occurrence, concentrations, and potential risk to public health. The proposed list of unregulated contaminants is being announced for public comment today. It contains 30 chemicals, including certain PFAS. Once the rule is finalized, EPA will collect and release data on these chemicals from sampled public water systems.

EPA's data collection effort under this new UCMR will continue to inform the agency's PFAS OUT initiative to help drinking water systems address PFAS. PFAS OUT is a proactive outreach initiative to provide information on resources, including funding and technical assistance, to drinking water systems with PFAS challenges. This outreach will provide practical, interactive, and location-specific resources, including webinars and information on how to access funding and technical assistance to address PFAS. All water systems will be able to access PFAS OUT resources and can secure technical assistance through EPA's RealWaterTA.

The proposed UCMR 6 Rule will be available for a 60-day public comment period. During that time, the agency will host two identical public webinars onAugust 11, 2026, and August 12, 2026. To register for the webinars, visit: [https://www.epa.gov/dwucmr/unregulated-contaminant-monitoring-rule-ucmr-meetings-and-materials]. Once the FRN is published in the Federal Register, the public may comment online: https://www.regulations.govExit EPA's website, Docket ID: EPA-HQ-OW-2023-0469.

For more information about the current and previous UCMR cycles, please visit EPA's UCMR website.