The Environmental Protection Agency has finalized sweeping rollbacks of coal ash disposal regulations, eliminating monitoring requirements at more than 1,400 disposal sites nationwide and removing protections that environmental health experts warn could expose millions of Americans to toxic heavy metal contamination in drinking water.
The regulatory reversal, announced Wednesday, exempts legacy coal ash ponds and unlined landfills from groundwater testing mandates implemented during the Obama administration. The move represents one of the most significant environmental deregulation actions of President Donald Trump's second term, delivering a long-sought victory to the coal industry while alarming public health advocates.
"The EPA just took a sledgehammer to protections designed to prevent arsenic, mercury, and lead from leaching into the aquifers that supply drinking water to tens of millions of people," said Lisa Evans, senior counsel at Earthjustice. "This isn't regulatory adjustment—it's abandonment of the agency's core mission to protect public health."
Coal ash—the toxic residue left after burning coal for electricity—contains dangerous concentrations of heavy metals including arsenic, chromium, mercury, and selenium. When stored in unlined ponds or landfills, these contaminants can migrate into groundwater, creating contamination plumes that persist for decades. The Obama-era rules required utilities to monitor groundwater at disposal sites and remediate any detected contamination.
The new EPA guidance removes those requirements for approximately 700 inactive coal ash ponds and 500 legacy landfills, many located in low-income communities and communities of color that already face disproportionate environmental health burdens. Environmental justice advocates emphasize that the rollback exacerbates existing inequities in toxic exposure.
"These sites don't disappear because monitoring stops," noted Dr. Avner Vengosh, geochemist at Duke University whose research has documented coal ash contamination across the Southeast. "The contaminants continue leaching. We're simply choosing not to measure it—which means communities won't know they're being poisoned until health impacts become undeniable."
