EPA Proposed Delegating Wisconsin Coal Ash Oversight
The state would assume sole regulatory authority over coal ash landfills, ending dual federal and state monitoring.
Updated on Oct. 12, 2026 in Utilities
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The EPA has proposed transferring regulatory authority for coal ash landfills to the Wisconsin Department of Natural Resources. This shift would streamline oversight for the state's six active landfills, currently managed under both federal and state rules.
Why it matters
The proposal seeks to improve cost efficiency and eliminate duplicate regulatory requirements for operators. It arrives as the state seeks to formalize its existing coal ash management program after updating rules in 2022 to align with 2015 federal standards.
Wisconsin manages six active coal ash landfills owned by Dairyland Power Cooperative, Alliant Energy, Wisconsin Public Service, and We Energies. The state's program, which aligns with 2015 federal mandates, was submitted for approval following rule updates in 2022.
The players
Environmental Protection Agency
The federal regulatory body responsible for establishing and enforcing environmental standards for industrial waste.
Wisconsin Department of Natural Resources
The state agency tasked with managing natural resources and overseeing environmental compliance programs in Wisconsin.
The details
Under this proposal, the Wisconsin Department of Natural Resources would assume primary oversight, removing the current burden of dual compliance. Operators remain subject to state-mandated groundwater sampling and monitoring requirements. While the EPA retains jurisdiction over coal ash ponds, this change would consolidate landfill regulation entirely under state control.
Timeline
2015: Federal coal ash landfill regulations were imposed.
2022: Wisconsin updated coal ash landfill regulations.
February 2026: Wisconsin DNR sought coal ash program approval.
November 9, 2026: Virtual public hearing on the EPA proposal.
Market Landscape
This move follows the implementation of the 2015 federal coal ash landfill regulations, which set the standard for current containment practices. By shifting oversight, the EPA is following a precedent of delegating management to states that have updated their programs to meet these federal baselines.
Operators in the utility sector should monitor the comment period and the resulting administrative burden reduction. Businesses currently performing groundwater monitoring at landfills should prepare for potential shifts in reporting documentation if the state assumes sole oversight.
The takeaway
This shift aims to simplify the compliance landscape for utilities by ending duplicative oversight. Owners should track the outcome of the November 9 virtual hearing to determine when state-only reporting standards will take effect.
What happens next
The EPA will hold a virtual public hearing regarding this proposal on November 9, 2026.
Further reading
For more on state-level infrastructure management, visit the Utilities section.
Source note: This article includes information reported by WPR.
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