MEXICO (NBC) - A copper mine in Mexico is under investigation for polluting nearby waterways with ten million gallons of contaminated water.
Mexico's Federal Environmental Agency says heavy rainfall at the Buenavista Copper Mine in the town of Cananea caused an overflow of acidic water from the mine into the Sonora River earlier this month.
Local media report around 800,000 people have been affected by the spill after authorities restricted water supply from the site.
Experts are measuring acidity in the water to track any improvement.
The Buenavista del Cobre Mine is around 25 miles south of the US border.