Wisconsin Hazardous Waste Treatment regulations & environmental compliance analysis

Wisconsin Hazardous Waste Treatment: What you need to know

Governing Law and Regulations

Treatment facility license and fee requirements: Wisconsin Administrative Code, Department of Natural Resources (NR) 670.001 to 670 Appendix II

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Thermal treatment interim-status facility rules: NR 665.0370 to 665.0383

Chemical, physical, and biological treatment: NR 665.0400 to 665.0406

Generator on-site treatment: NR 662.014, NR 662.016, NR 662.017, NR 664.0001(7)(c), and NR 668

Regulatory Agency

Wisconsin Department of Natural Resources (DNR) Environmental Management Division Waste & Materials Management Program

Comparison: State vs. Federal

Rules. Wisconsin has adopted the U.S. Environmental Protection Agency's (EPA) Hazardous Waste Generator Improvements Rule, effective in the state as of September 1, 2020, which includes standards that allow generators to treat hazardous waste on-site. The state has added some more stringent state requirements in connection with hazardous waste treatment facility licensing and treatment facility fees. As under the federal rules, Wisconsin allows hazardous waste generators to treat hazardous waste on-site without a permit.

Administration and enforcement. The Wisconsin Department of Natural Resources' (DNR) Environmental Management Division administers and enforces the hazardous waste treatment rules in Wisconsin.

State Requirements


Wisconsin refers to “permits” as “licenses.” Before the DNR issues a license to a hazardous waste treatment facility, the facility owner and operator must submit a feasibility and plan of operation report to the DNR and comply with additional state permit application standards. Wisconsin has several fee requirements for hazardous waste treatment facilities.


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