THE U.S. Supreme Court appeared divided after oral arguments on Nov. 6 in a closely followed environmental case that will have major implications for the scope of federal regulatory power under the Clean Water Act (CWA).The case boils down to whether the addition of a pollutant to groundwater that eventually reaches a water of the U.S. (WOTUS) requires a National Pollutant Discharge Elimination System (NPDES) permit.
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