Updated Definition of “Waters of the United States”

The record

Publisher

Federal Register

Agency

Defense Department; Engineers Corps; Environmental Protection Agency

Source

Federal Register

Kind

Federal Register: proposed rule

Jurisdiction

United States

Topics

Defense, Environment

Importance

Headline, the top of three tiers Kresmion sets by fixed rules from the source's own fields

Published (source time)

2026-09-09 (the source gives a date only)

First seen on Kresmion

2026-10-26 18:24 UTC

The original

• PDF (Federal Register)

Source: Federal Register (federalregister.gov). U.S. government work, public domain.

The publisher's summary

The purpose of this supplemental notice of proposed rulemaking is for the U.S. Environmental Protection Agency (EPA) and the Department of the Army ("the agencies") to supplement and seek additional comment on certain aspects of an earlier proposal, published on November 20, 2025, to revise the regulations defining the scope of waters federally covered under the Clean Water Act in light of the U.S. Supreme Court's 2023 decision in Sackett v. Environmental Protection Agency. As stated in the agencies' November 20, 2025 Notice of Proposed Rulemaking (NPRM), the agencies intend for this rulemaking to provide greater regulatory certainty and increase Clean Water Act program predictability and consistency by clarifying the definition of "waters of the United States." After consideration of the public comments received on the NPRM, the agencies are issuing this notice to supplement the NPRM with additional regulatory options on certain aspects of the proposed rule.

The publisher's words, as published.

Federal Register document

Document number

2026-18317

Document type

Proposed Rule

Significant

Yes

Status

Published