As this National Law Review (NLR) article details, the U.S. Department of Justice (DOJ) recently issued a memo reiterating that the federal government strongly disfavors separate federal agency action seeking penalties under the Clean Water Act (CWA) when a state has already initiated its own enforcement action against a regulated entity.  According to the NLR article, the DOJ memo is apparently one in a series of policy pronouncements from the Trump Administration emphasizing cooperative federalism in the context of environmental [...]