2023 Is Shaping Up to Be a Big Year for the Clean Water Act and Its “Waters of the United States”
In January, the Biden Administration promulgated the federal government’s latest rule defining “waters of the United States” (WOTUS Rule). The WOTUS Rule, which defines the waters that are subject to federal permitting and oversight under the Clean Water Act (CWA) by the U.S. Environmental Protection Agency (EPA) and U.S. Army Corps of Engineers (USACE), went into effect on March 20, 2023. As with past attempts to define “waters of the United States,” the new WOTUS Rule is already triggering legal challenges. Since the enactment of the CWA in 1972, courts, agencies, and landowners have struggled to define the statute’s geographic scope, especially with respect to wetlands, which do not fit neatly within familiar notions of “water” or “land.” The statute prohibits unpermitted discharges of pollutants (including fill material) into “navigable waters” but defines that term broadly as “the waters of the United States, including the territorial seas.” The Biden Administration’s WOTUS Rule replaces the Trump Administration’s Navigable Waters Protection Rule (NWPR), which was promulgated in 2020 but subsequently vacated by two federal district courts. The NWPR followed the Trump Administration’s 2019 repeal of a 2015 Obama Administration rule (the 2015 Clean Water Rule) that had taken a categorical approach to defining “waters of the United States.” The Biden Administration’s WOTUS Rule seeks to return to...