On November 18,2007 Colombian newspaper El Tiempo reported that the river was receiving residual waters from the city of Popayan, seven gold mines that also add industrial pollutants such as mercury, some 8 sand mills, plus a couple of mines of coal and bauxite.
The river was receiving residual waters from the city of Popayan. This was what colombian newspaper El Tiempo reported on November 18,2007. Popayan was seven gold mines. These seven gold mines also add industrial pollutants such as mercury, plus a couple of mines of coal and bauxite. Mercury was some 8 sand mills.