From the story you linked to:
"Under the new regulations, landowners and property developers will be able to pour pesticides, fertilizers and other pollutants directly into millions of miles of the nation's waterways for the first time in decades."
Fake news by the liberal BBC.
It mainly affects small streams that do not extend beyond the state lines which will be under the control and regulation of each individual states Pollution Control. Also note Obama pt these mainly into effect in 2015 a year before h.w Leahy office. So it's not some old law. Here's an excerpt from The New York Times.
"The new rule, written by the Environmental Protection Agency and the Army Corps of Engineers, will retain federal protections of large bodies of water, as well as larger rivers and streams that flow into them and wetlands that lie adjacent to them. But it removes protections for many other waters, including wetlands that are not adjacent to large bodies of water, some seasonal streams that flow for only a portion of the year, “ephemeral” streams that only flow after rainstorms, and water that temporarily flows through underground passages."