SCOTUS Creates “Functional Equivalent” Test to Determine Whether Point Source Dischargers Are Subject to the Clean Water Act
The U.S. Supreme Court recently handed down a decision in the most prominent Clean Water Act (CWA) case since its 2006 plurality decision in Rapanos v. United States. In County of Maui v. Hawaii Wildlife Fund, the Court interpreted the landmark statute to require a permit where there is a “functional equivalent” of a direct discharge from a “point source” into “navigable waters.” The likely impact of this holding for the parties is to subject the County of Maui to the statute’s permitting requirements for its discharges of treated wastewater through wells to groundwater that eventually reach the ocean. Beyond the parties, environmental groups are likely to cheer this decision while the regulated community, and lower courts, will likely be wary of the Court’s multifactor test. The CWA prohibits the “addition” of any pollutant from a “point source” to “navigable waters” without a permit from the Environmental Protection Agency (EPA). The County of Maui came before the Court as the operator of a wastewater reclamation facility in Maui, Hawaii. That facility collects sewage, partially treats it, then pumps that water into four underground wells. The effluent then travels about a half mile through groundwater to the Pacific Ocean. For nearly five decades the facility operated in this manner with the knowledge of the EPA, and...