In 2015, the Environmental Protection Agency and the Department of the Army published the Clean Water Rule: Definition of `Waters of the United States' (short summary of primary impacts here). The agencies now propose to replace the 2015 definition of 'waters of the United States,' and reinstate the definition of 'waters of the United States' that 'existed prior to the 2015 rule, to reflect the current legal regime under which the agencies are operating.' This is in compliance with the February 28, 2017 Executive Order: Restoring the Rule of Law, Federalism, and Economic Growth by Reviewing the `Waters of the United States' Rule. Changing the definition of 'waters of the United States' changes the waters which fall under the provisions of the Clean Water Act.
*The EPA released a pre-publication of a notice extending the comment period for this proposed rule from August 28th, 2017, to September 27th, 2017.