For the next five years, the Environmental Protection Agency has indicated it will not require public water utilities to test for microplastics or pharmaceuticals in drinking water, according to a proposed rule published in the Federal Register.

On Friday, the EPA submitted a list of chemicals it plans to test for under the Unregulated Contaminant Monitoring Rule, a mandatory testing program used to collect information about concerning chemicals in drinking water that could be harming human health. It did not include microplastics or pharmaceuticals.

The omissions come after announcements by EPA Administrator Lee Zeldin earlier this year that his agency was designating microplastics and pharmaceuticals priority contaminants for testing."

Susanne Rust reports for the Los Angeles Times June 30, 2026. [2]

SEE ALSO:

"EPA Proposes Scanning Drinking Water for 30 New Contaminants" (Bloomberg Environment) [3]