For decades, the Supreme Court struggled to define a key term at the heart of the Clean Water Act, the landmark 1972 legislation that forms the backbone of America’s efforts to “restore and maintain the chemical, physical, and biological integrity of the Nation’s waters.” … The Clean Water Act prohibits “discharge of pollutants” into “navigable waters.” But it also defines the term “navigable waters” vaguely and counterintuitively, to include all “waters of the United States, including the territorial seas.” In Rapanos v. United States (2006), the Supreme Court’s last attempt to define the key phrase “waters of the United States,” the justices split three ways, with no one approach winning majority approval from the Court…. Now, Sackett v. EPA brings this question to a Court that’s moved dramatically to the right after former President Donald Trump filled a third of its seats.
