Serowbot wrote on 09/12/19 at 11:39:13:

Because 40% of America thinks drinking dirty water is a good idea.    Draining the swamp into our taps?...

As was said:
"At a minimum its a  ...  scare tactic"

 Part of the issue is the concept of "Government Overreach".

 The Obama era modifications sought to include almost all forms of water containment in natural structure.  This includes small irrigation ponds on private land used in agriculture.  For many the cost of testing alone exceeded the annual income of the farmer, and many of the ponds are for irrigation drainage not irrigation itself.

 By repealing the modification it returns the regulations to being applied to "Navigable Waterways" thus leaving smaller tributaries and ponds alone.  The Supreme Court had left the door open for tighter restrictions and I imagine the best solution is somewhere between Obama and Trump.

 Imagine that, a compromise between Obama and Trump policy, if only something like that was possible.

 Water maintenance and safety is a good thing, but it has to be sustainable.  Right now we have a battle between too much cost, and not enough safety.