The Environmental Protection Agency at <a href="https://en.wikipedia.org/wiki/2015_Gold_King_Mine_waste_water_spill" id="mwAeI" rel="mw:WikiLink" title="2015 Gold King Mine waste water spill">Gold King Mine waste water spill</a> releases three million gallons of <a href="https://en.wikipedia.org/wiki/Toxic_heavy_metal" id="mwAeM" rel="mw:WikiLink" title="Toxic heavy metal">heavy metal toxin tailings</a> and waste water into the <a href="https://en.wikipedia.org/wiki/Animas_River" id="mwAeQ" rel="mw:WikiLink" title="Animas River">Animas River</a> in Colorado.