As discussed in prior blog posts, the Federal Circuits became split (Part 1) in 2018 on whether the Clean Water Act (“CWA” or the “Act”) regulates discharges of pollutants from point sources that reach navigable waters through nonpoint sources, such as groundwater. Recently, the U.S. Supreme Court granted certiorari in one of those Circuit decisions (Part 2), and the case is still in front of the Supreme Court. While U.S. EPA had requested comments on this and other issues (Part 3), the agency’s current position was unknown until recently. On April 15, 2019, EPA released an interpretive statement and corresponding press release providing new guidance on whether the CWA permitting requirements apply to discharges directly to groundwater (78 Fed. Reg. 16810 (April 23, 2019)).

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The Trump administration announced in December 2018 its proposed replacement rule defining “waters of the United States.” Under the proposed rule, the number of wetlands that fall outside of federal jurisdiction is expected to increase.

Phillip Bower and Megan McLean weigh in on what this means for state regulation of non-federal wetlands in the recent