WOTUS definition narrowing proposed — implications for restoration permitting. A proposed rule would narrow the definition of “Waters of the United States” under the Clean Water Act, potentially removing federal protections from streams and wetlands that currently fall under jurisdiction.
What this means for restoration portfolios. For restoration entities in Washington, the WOTUS definition shapes which waterways require federal permitting, Section 401 water quality certification, and EPA enforcement oversight. A narrower definition could reduce regulatory burden on some projects while removing the federal backstop that supports funding justification for others. Entities whose portfolios include wetland or headwater restoration may see shifting compliance requirements.
Source: Stroud Water Research Center, March 25, 2026
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