The WOTUS rule was quite the stretch of Congressional authority to regulate interstate commerce.  It defined WOTUS as interstate rivers, lakes, the ocean shoreline, and: 

"All other waters such as intrastate lakes, rivers, streams (including intermittent streams), mudflats, sandflats, wetlands, sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds, the use, degradation or destruction of which could affect interstate or foreign commerce including any such waters: 
Which are or could be used by interstate or foreign travelers for recreational or other purposes; or
(From which fish or shellfish are or could be taken and sold in interstate or foreign commerce; or
Which are used or could be used for industrial purposes by industries in interstate commerce;
All impoundments of waters otherwise defined as waters of the United States under this definition;
Tributaries of waters identified in paragraphs (s)(1) through (4) of this section;"  

So basically any water anywhere.