I am not a fan of the EPA, but:
There is more to this story than the news media prints. Water rights here are really, really complicated. Really.
What you want to use and where, affects many people and animals. Water rights do not go along with all real estate. The EPA had only a tiny bit to do with this mess, but popular news sources seem to use whatever hot topics, or agencies, they can to get an audience.
The prudent thing to do, in Wyoming, when thinking about any project involving water, is to get the opinion of a water attorney before you start. Saves one a lot of grief, whether from the government or your neighbors.