B.C. smelter linked to mercury in Columbia River AP, Seattle Times
Newly obtained documents reveal the Teck Cominco smelter in British Columbia dumped tons of highly toxic mercury into the Columbia River for decades.
The smelter's record of dumping contaminated slag, a smelting byproduct, has been known for years.
But documents The (Spokane) Spokesman-Review obtained from British Columbia's Ministry of the Environment shed new light on the extent of mercury releases from the lead-zinc smelter in Trail, B.C., about six miles north of the Washington border.
Calculations based on two Canadian estimates indicate that 1.6 tons to 3.6 tons of mercury had been discharged into the river each year since the 1940s, the newspaper reported.