The EPA has proposed rolling back wastewater protections that prevent coal-fired power plants from discharging toxic ash waste into U.S. waterways. The proposal would allow facilities to dump effluent containing arsenic, mercury, selenium, and lead directly into rivers and streams.

This action extends a September 2025 enforcement delay granted by Trump's EPA to coal plant operators. The initial postponement deferred implementation of long-standing wastewater standards designed to protect drinking water sources and aquatic ecosystems.

Coal ash, the residual byproduct from burning coal for electricity, contains heavy metals at concentrations that pose documented health risks. Arsenic causes cancer at low chronic exposures. Mercury bioaccumulates in fish tissue, affecting both wildlife and human consumers. Selenium disrupts reproductive and neurological systems in fish at parts-per-billion levels. Lead damages child development and kidney function.

The 2015 Coal Ash Rule, adopted after decades of delay and environmental advocacy, required utilities to manage ash in lined landfills and monitor groundwater. Subsequent rules tightened wastewater discharge standards for coal ash facilities. The proposed rollback reverses these requirements, shifting contamination risk from regulated landfills to surface waters where millions of Americans draw drinking water.

Coal plants currently hold approximately 130 million tons of ash in storage. Hundreds of unlined ash ponds exist at facilities across the country, with documented groundwater contamination in multiple states. The wastewater standards addressed direct discharges from these storage areas.

Environmental groups have signaled intention to challenge the rollback in federal court under the Administrative Procedure Act, arguing the agency failed to justify abandoning health-based standards. Public comment periods on the proposal will determine the formal record.

The rollback aligns with broader deregulation efforts within the current EPA leadership, which has frozen or reversed air quality rules,