Due to a recent federal court ruling, a long-standing disclosure exemption for the mining industry has been repealed. Previously, mining firms were not obliged to determine and disclose the toxic compounds present in their waste rock and tailings ponds. Apparently, environmental groups have been seeking to get rid of the exemption for sixteen years. American firms have had to obey similar disclosure rules for a decade now.
Data going back to 2006 will be made available on Canada’s National Pollutant Release Inventory (NPRI).