US EPA And Army Corps Revisit WOTUS Standard Ahead Of Final Clean Water Act Rule
PUBLISHED Oct 7, 2026, 12:16 AM ET
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The U.S. Environmental Protection Agency (EPA) and the Department of the Army have issued a supplemental notice of proposed rulemaking to further revise and narrow the definition of Waters of the United States (WOTUS) under the Clean Water Act. Following the Supreme Court decision in Sackett v. EPA and the initial 2025 proposal, this supplemental notice seeks public input on additional regulatory alternatives. The agencies aim to provide greater regulatory certainty, program predictability, and operational clarity for agricultural producers, industries, and state regulators before finalizing the rule.
By Yusra M. | JQJO News
Timeline of Events
- On May 25, 2023, the U.S. Supreme Court issued its landmark decision in Sackett v. EPA, limiting federal jurisdiction over wetlands.
- On March 12, 2025, EPA and the Army Corps issued joint implementation guidance regarding continuous surface connection requirements.
- On November 17, 2025, EPA and the Army Corps proposed a rule to update and narrow the definition of WOTUS.
- On January 5, 2026, the public comment period for the initial proposed WOTUS update officially closed.
- On September 9, 2026, the agencies published a supplemental notice of proposed rulemaking introducing additional definitions.
- On October 9, 2026, the public comment period for the supplemental WOTUS rulemaking concluded.
- On October 15, 2026, federal agencies began evaluating stakeholder submissions to shape the final rule.
- On November 1, 2026, agricultural and industry groups prepared for compliance adjustments under the anticipated standard.
- On November 15, 2026, environmental coalitions reviewed legal options regarding jurisdictional scope limitations.
- On December 1, 2026, stakeholders anticipated final agency determinations on the updated Clean Water Act standards.
News Intelligence
- Immediate US impact: Agricultural producers, developers, and state agencies review supplemental definitions ahead of regulatory finalization.
- Possible long-term US impact: Establishes a narrower, more standardized federal definition for protected waters and wetlands across the United States.
- Most affected groups: Farmers, real estate developers, environmental organizations, and state environmental regulators.
- Reader Prioritization: Prioritize official EPA notices, Federal Register publications, and legal analyses from environmental law experts.
Coverage of Story:
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