# Revised Definition of “Waters of the United States”
> **US Department of Defense** · Final rule. · Published 2023-01-18 · Effective 2023-03-20 · 88 FR 3004
## Document
- **Document number:** 2022-28595
- **Category:** other
- **Sub-agency:** US Department of Defense
- **Federal Register citation:** 88 FR 3004
- **CFR reference:** 33 CFR 328
- **Publication date:** 2023-01-18
- **Effective date:** 2023-03-20
- **DOD docket:** EPA-HQ-OW-2021-0602
## Abstract

The Environmental Protection Agency (EPA) and the Department of the Army ("the agencies") are finalizing a rule defining the scope of waters protected under the Clean Water Act. In developing this rule, the agencies considered the text of the relevant provisions of the Clean Water Act and the statute as a whole, the scientific record, relevant Supreme Court case law, and the agencies' experience and technical expertise after more than 45 years of implementing the longstanding pre-2015 regulations defining "waters of the United States." This final rule advances the objective of the Clean Water Act and ensures critical protections for the nation's vital water resources, which support public health, environmental protection, agricultural activity, and economic growth across the United States.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/01/18/2022-28595/revised-definition-of-waters-of-the-united-states)
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