The Environmental Protection is admitting to a spill from a treatment plant it set up after it dumped 3 million gallons of toxic wastewater into a Colorado river last year. The EPA said Thursday night that the spill happened on Tuesday, and officials are still attempting to determine how much and what metals were contained in the sludgy discharge, ... The Navajo Nation sued the agency over the spill last week after the EPA inspector general and the Justice Department opened a criminal investigation into the incident a few days before the Aug. 5 anniversary of the 2015 spill. The...