The Center for Biological Diversity says the report "demonstrates unequivocally that uranium mining should not proceed in these environmentally sensitive lands," pointing in particular to high levels of uranium at old mines that have not been reclaimed.
The USGS report concludes:
Historical water-quality and water-chemistry data evaluated for 1,014 water samples from 428 sites indicate that about 70 sites have exceeded either the primary or secondary maximum contaminant levels for certain major ions and trace elements, such as arsenic, iron, lead, manganese, radium, sulfate,
and uranium. These data suggest that water recharged from the surface or from perched water-bearing zones may contain dissolved gypsum from overlying rock units or may have been in contact with sulfide-rich ore. A few springs and wells in the region contain concentrations of dissolved uranium greater than the U.S. Environmental Protection Agency maximum contaminant level of 30 μg/L. These springs and wells are close by or in direct contact with orebodies.
Samples from 15 springs and 5 wells in the region contained dissolved uranium concentrations greater than the U.S. Environmental Protection Agency maximum contaminant level for drinking water. These springs and wells are close by or in direct contact with mineralized orebodies, and those concentrations are related to natural processes, mining, or to both.