Defining “Waters of the US” – A Continuing Saga

On July 12, the US Environmental Protection Agency (EPA) and the Army Corps of Engineers continued the seemingly interminable project to construct a working, regulatory definition of “Waters of the United States” (or, WOTUS) for various environmental regulatory programs administered under Title 40 of the Code of Federal Regulations (CFR). This “supplemental notice of proposed rulemaking” purports “to clarify, supplement and seek additional comment” on the July 2017 proposal to repeal the 2015 Rule Defining Waters of the United States” which amended previously existing sections of the CFR that the 2015 Rule sought, well, to clarify.

The current proposal, if finalized, will repeal the 2015 Rule and restore the text that existed before publication of the 2015 Rule, “as informed by guidance in effect at that time.” EPA has previously (February 2018) published a rule extending the applicability date of the 2015 Rule to February 2020, and implementation of the 2015 Rule has been stayed by judicial proceedings, so in effect we’ve been working with the preexisting text, informed by EPA’s prior guidance, since that time.

Meanwhile, whether groundwater can ever be considered “Waters of the US” under whatever rules are in place continues to be a hot topic.

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