This Excel chart compares the Trump Administration’s proposed rule “Redefinition of Waters of the United States”, the 2015 Obama Administration rule defining Waters of the United States, and the regulatory definitions which existed before that. The chart provides brief information on how each defined various features/bodies of water, and where in the proposed redefinition of WOTUS (from 2018-2019) to find more information on particular terms and definitions. The chart is intended to provide ACWA members with quick comparisons between definitions, and references within the new rule to find the definitions and to find more information.