Tag: angelalcala

Heavy Metals Still Found in Pagatban River

Heavy Metals Still Found in Pagatban River

Thirty years after a copper mine stopped operating and dumping its tailings on the Pagatban River in southern Negros Island, Silliman researchers have found that the water quality of the river has generally improved, but heavy metals (copper and zinc) are still found in the river bottoms at concentrations 200 to 5,000 times higher than acceptable levels, posing an environmental threat.