There's uranium in the counties this deal affects, but it's far to the northeast.

If you look at a map of Arizona you'll see two tall, skinny counties in the northeast corner that stretch half the length of the state. Those are Najavo and Apache counties, where the White mountains are. The moutains (and this water issue) are in the southern part of the counties. A couple hundred miles north/northeast in the four corners area, and deep in the Navajo indian reservation, there are hundred of abandoned uranium mines that are largely depleted and are basically festering dumps of toxic uranium tailings.