The Trump administration said Friday it backs a 10-year deadline for replacing lead pipes across the country, supporting one of the strongest drinking water standards in three decades. The Environmental Protection Agency told a federal appeals court it will defend the strict rule against a legal challenge by a utility industry association. The move marks a departure from the Trump administration’s typical deregulation agenda.
Lead is a neurotoxin that can stunt children’s development, lower IQ scores and increase blood pressure in adults. The Biden administration estimated that stricter standards would protect up to 900,000 infants from low birth weight and avoid up to 1,500 premature deaths a year from heart disease.
What the Rule Requires
The new standard lowers the action trigger for lead in drinking water to 10 parts per billion from 15. When higher levels are found, water systems must notify consumers, take immediate action to reduce lead and work to replace lead pipes, which are commonly the main source of contamination.
“After intensive stakeholder involvement, EPA concluded that the only way to comply with the Safe Drinking Water Act’s mandate to prevent anticipated adverse health effects ‘to the extent feasible’ is to require replacement of lead service lines,” the agency said in its court filing.
The rule revision also changes how lead levels are measured, potentially significantly expanding the number of communities found in violation of federal standards.
Industry Opposition
The American Water Works Association challenged the rule, arguing the EPA lacks authority to regulate pipes on private property and therefore cannot require their replacement. The association also said the 10-year deadline was not feasible, citing labor shortages and other major infrastructure challenges water utilities face simultaneously.
Utilities were given three years to prepare before the 10-year timeline begins, and some cities with extensive lead contamination were granted longer periods to comply.
The EPA countered that utilities have sufficient control over lead pipes to be required to replace them. The agency said it analyzed data from dozens of water systems and concluded that the vast majority could complete replacement within the decade.
Geographic Concentration and Scope
Lead pipes are most commonly found in older industrial cities, particularly in the Midwest. Chicago, Cleveland, Detroit and Milwaukee all have extensive lead infrastructure.
The Biden administration estimated about 9 million lead pipes supply water to American homes and businesses. The Trump administration updated the analysis and now projects roughly 4 million pipes, using revised methodology that assumes communities that did not submit data have no lead pipes.
The original federal lead and copper rule was enacted more than 30 years ago. The stricter standard represents a significant tightening of requirements that had remained largely unchanged for decades, as previous approaches relying on chemical treatment and monitoring “failed to prevent system-wide lead contamination and widespread adverse health effects,” the EPA said.
Trump Administration’s Selective Approach
The administration’s backing of the lead rule contrasts with its broader deregulation agenda. On Friday alone, the EPA repealed tight limits on mercury and other toxic emissions from coal plants. In March, the agency announced plans to partially roll back rules on so-called “forever chemicals” in drinking water.
“People power and years of lead-contaminated communities fighting to clean up tap water have made it a third rail to oppose rules to protect our health from the scourge of toxic lead,” said Erik Olson, senior director at the Natural Resource Defense Council. “Maybe only a hidebound water utility trade group is willing to attack this basic public health measure.”
The federal appeals court challenge proceeds as the administration continues to navigate competing pressures: its broader commitment to cutting regulations and the political reality that lead pipe replacement has become difficult to oppose in the face of documented health consequences.