Yesterday the Supreme Court of the United States issued its most significant Clean Water Act decision in more than a decade, resolving a split among lower courts over the reach of the Clean Water Act’s “point source” or National Pollutant Discharge Elimination System (NPDES) program. Pollutants travel to bodies of water in many ways: by pipe, ditch, or runoff, for example. The Clean Water Act defines some of those ways of moving pollutants as “point sources”—specifically, pipes, ditches, and similar “discernible, confined and discrete conveyance[s]”—and bans the “addition of any pollutant to navigable waters from any point source” without an NPDES permit. But no similar permitting requirement applies to pollution added from nonpoint sources, which is instead controlled by state and other federal environmental laws. 
Continue Reading County of Maui v. Hawai’i Wildlife Fund: Supreme Court Rejects Ninth Circuit’s Expansive Test for NPDES Permitting Under Clean Water Act, Requires Direct Discharges to Navigable Waters or Functional Equivalent of a Direct Discharge

For decades, the precise scope of the Clean Water Act’s point source permitting program has been the subject of much controversy.  Over the past several years, the question of whether that program—known as the National Pollution Discharge Elimination System (“NPDES”)—regulates discharges to groundwater that is hydrologically connected to surface water has produced a number of conflicting decisions and a torrent of commentary and public debate.  The Fourth and Ninth Circuits recently concluded that the NPDES program regulates such discharges under certain circumstances, while the Sixth Circuit reached the opposite conclusion, setting up potential review of the issue in the United States Supreme Court.
Continue Reading New Lawsuit Seeks to Expand the Reach of the Clean Water Act to Air Emissions