EPA Targets Coal Waste Water to Save Billion
Published Date: 5/18/2026
Proposed Rule
Summary
The EPA is updating rules for steam electric power plants to better control dirty water leaking from leftover coal waste. This change affects existing power plants and is expected to save up to $1 billion a year while protecting water quality. Comments on the proposal are open until June 17, 2026, so now’s the time to speak up!
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Analyzed Economic Effects
3 provisions identified: 2 benefits, 1 costs, 0 mixed.
Estimated Annual Cost Reduction
The EPA proposes revising the 2024 rule for unmanaged coal ash leachate and estimates the revision would reduce costs by $446 million to $1,090 million per year using a 3% discount rate. The Agency frames this change as supporting affordable and reliable power for American families.
Who Must Comply: 63–111 Coal Plants
The proposal applies to unmanaged combustion residual leachate at existing coal-fired power plants. EPA estimates between 63 and 111 plants may be discharging unmanaged CRL and notes at least seven plants are already pumping and treating such leachate; plants determined to be discharging unmanaged CRL could incur compliance costs, including after retirement.
Protects Water Quality From Coal Ash Leachate
The EPA says the proposed revision will protect water quality by revising how unmanaged coal combustion residual leachate (CRL) is regulated and treated. The proposal focuses only on unmanaged CRL and seeks data and comment on technologies and costs to address those discharges.
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