State of Washington v. Environmental Protection Agency, 11 F.4th 1154 (9th Cir. 2022)
The State of Washington v. EPA case serves as a fundamental battle over federal and state authority in environmental regulation, specifically relating to water quality standards under the Clean Water Act (CWA).
Did the EPA violate the Clean Water Act by approving Washington's water quality standards in a manner that is arbitrary, capricious, or otherwise not in accordance with the law?
Under the Administrative Procedure Act (APA), a court must set aside agency actions found to be 'arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law.' The Clean Water Act requires that state water quality standards protect public health and welfare, enhance the quality of water, and are based on scientific data.
The Ninth Circuit Court of Appeals held that the EPA's approval of Washington's water quality standards was not arbitrary or capricious under the Administrative Procedure Act, and therefore did not violate the Clean Water Act.
This case is significant because it illustrates the challenges faced by federal agencies in balancing technical scientific data, public health concerns, and state policy decisions. It also serves as an example of how courts review agency actions under the Administrative Procedure Act. For law students, this decision provides insights into environmental law litigation and administrative review processes, demonstrating the complexities of regulatory oversight and intergovernmental relations.