The U.S. Supreme Court has limited how flexible the Environmental Protection Agency and states can be in regulating water pollution under the Clean Water Act in a ruling issued March 4, 2025. However, the justices kept the decision relatively narrow.
The ruling only prohibits federal and state permitting agencies from issuing permits that are effectively broad orders not to violate water quality standards. In this case, the city and county of San Francisco argued successfully that the EPA’s requirements were not clear enough.
