EPA Proposed Coal Ash Oversight Shift in Wisconsin

The EPA is considering delegating regulatory authority for coal ash landfills to the Wisconsin Department of Natural Resources.

Updated on Oct. 12, 2026 in Utilities

EPA Proposed Coal Ash Oversight Shift in Wisconsin

Live Poll

Do you trust state regulators to manage industrial waste sites as effectively as federal agencies?

The EPA has proposed transferring oversight of coal ash landfills to the Wisconsin Department of Natural Resources to eliminate dual regulation. This move aims to streamline management of the states six active coal ash landfills.

Why it matters

The proposal seeks to remove duplicate oversight by the state and federal government to improve cost efficiency for regulators. The shift follows efforts by Wisconsin to align its internal management program with established federal standards.

There are six active coal ash landfills currently operated by utilities including Dairyland Power Cooperative and We Energies. These sites are subject to ongoing groundwater sampling and monitoring requirements mandated by state regulators.

The players

Environmental Protection Agency

This is the federal agency responsible for establishing and enforcing environmental protection standards across the United States.

Wisconsin Department of Natural Resources

This is the state agency tasked with managing and protecting Wisconsin's air, land, and water resources.

We Energies

This utility provider operates in Wisconsin and has historically managed coal ash deposits at sites like the Cedar Sauk Ash Landfill.

The details

The Wisconsin Department of Natural Resources updated its rules in 2022 to mirror 2015 federal regulations, serving as a precursor to this request for primary oversight. While this shift covers landfills, the EPA will retain direct authority over coal ash ponds across the state.

1969 to 1977: We Energies deposited coal ash at the Cedar Sauk landfill.
2015: The federal government imposed initial coal ash landfill regulations.
2022: Wisconsin updated its internal coal ash landfill regulations.
February 2026: The Wisconsin DNR submitted its program for federal approval.
November 9, 2026: The EPA will host a virtual public hearing on the proposal.

Market Landscape

This transition reflects a broader shift toward delegating environmental oversight to states that have updated their programs to meet federal benchmarks. It marks a departure from the dual-oversight model that has dominated the utility sector since 2015.

Residents in areas near the six active coal ash landfills may see changes in how environmental monitoring is reported and enforced. The shift to state-level oversight is intended to streamline local regulatory processes while maintaining required groundwater safety standards.

The takeaway

The EPA proposal highlights an ongoing effort to simplify environmental compliance for utilities by consolidating regulatory power at the state level. Residents should monitor the upcoming public hearing to understand how state-led oversight will prioritize local groundwater protection moving forward.