Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Waters of the United States

  • EPA and Army Announce Guidance and a "WOTUS Notice: The Final Response to SCOTUS"

    On March 12, 2025, the U.S. Environmental Protection Agency and Department of the Army announced a joint memorandum issuing guidance to field staff on implementation of “continuous surface connection” consistent with the U.S. Supreme Court’s May 25, 2023, decision in the case of Sackett v. Environmental Protection Agency. The agencies also announced a Federal Register notice publicizing a series of six listening sessions and a 30-day recommendations docket to solicit feedback on key aspects of the definition of “waters of the United States.”

    Read the joint guidance on continuous surface connection (pdf).

    Read the Federal Register notice (pdf).

    Read the press release.

    Read written recommendations.

  • EPA and the Army Issue Final Rule to Amend 2023 Rule

    On August 29, 2023, the U.S. Environmental Protection Agency and the U.S. Army Corps of Engineers issued a final rule that amends the "Revised Definition of 'Waters of the United States'" to conform key aspects of the regulatory text to the U.S. Supreme Court's May 25, 2023 decision in the case of Sackett v. Environmental Protection Agency. The conforming rule, "Revised Definition of 'Waters of the United States'; Conforming," published in the Federal Register and became effective on September 8, 2023. 

    Read the press release. 

    More information about the final conforming rule can be found here.

    Read the decision.

About Waters of the U.S.

A stream flowing around rocks.
  • About Waters of the United States
  • Programs Utilizing the Definition of Waters of the United States

Implementation

A person fishing in a lake.
  • Current Definition of Waters of the United States
  • Rule and Litigation Status
    • Pre-2015 Regulatory Regime
  • Coordination Process and Field Memoranda
  • Implementation Tools and Methods

Current Activities

A creek flowing over rocks.
  • Amendments to the 2023 Rule
  • Revising the Definition of "Waters of the United States"
  • Public Outreach and Stakeholder Engagement Activities
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 28, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.