Wisconsin law
Environmental Laws in Wisconsin.
Wisconsin environmental law is administered principally by the Wisconsin Department of Natural Resources (DNR) under authority of Wis. Stat. chs. 281–299. Core programs include the Wisconsin Environmental Policy Act (WEPA, Wis. Stat. § 1.11 — Wisconsin's NEPA-equivalent), the water-quality and NR 103 wetlands frameworks, the hazardous-substances discharge statute (Wis. Stat. § 292.11 — the "Spills Law"), and the Public Trust Doctrine protecting navigable waters. Wisconsin's Spills Law is distinctive for its broad duty to report and remediate discharges even without a cleanup-fund backstop.
Last verified: 2026-04-20
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State law
Key Wisconsin Statutes
Wisconsin's NEPA-equivalent — requires environmental review before state-agency decisions with significant environmental impact.
Wisconsin's Spills Law — imposes strict reporting and remediation duties on any person who possesses or controls a hazardous substance that is discharged.
Wisconsin's statutory implementation of the Public Trust Doctrine — DNR jurisdiction over activities affecting navigable waters of the state.
Wisconsin's principal water-pollution-control statute — administers the state NPDES-equivalent (WPDES) program.
State law
Official Sources
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This page summarizes publicly available statutes and rules for informational purposes only. It does not constitute legal advice, and no attorney-client relationship is created by viewing this content. Laws change — always verify with the primary source or consult a licensed attorney in Wisconsin.
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