Featured Expert Contributor, Environmental Law and Policy

Samuel B. Boxerman, Sidley Austin LLP, with Ben Tannen, Sidley Austin LLP

The definition of waters of the United States is central to the CWA.  At its core, the Act bans “the discharge of any pollutant” except in compliance with other provisions of the Act, such as the National Pollutant Discharge Elimination System (“NPDES”) permitting program.  33 U.S.C. § 1311(a).  “Discharge of a pollutant” is defined in relevant part as “any addition of any pollutant to navigable waters from any point source,” where (i) “navigable waters” are “the waters of the United States,”  and (ii) a “point source” is “any discernible, confined and discrete conveyance, including but not limited to any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, or vessel or other floating craft, from which pollutants are or may be discharged.”  See 33 U.S.C. §§ 1362(7), (12) and (14).