Following Glencore Plc's threat to close Canada's sole copper smelter due to new pollution control requirements, the Canadian federal government and the Quebec provincial government are advancing measures to rescue the facility. The Horne Smelter, located approximately 390 miles northwest of Montreal, is one of the few facilities in North America capable of processing copper concentrate and recyclable materials like electronic waste.
Last month, Glencore announced it had suspended plans to invest nearly CAD 1 billion (approximately USD 720 million) into its Quebec copper operations after negotiations with the provincial government over measures to reduce harmful arsenic emissions reached a stalemate. Without an agreement, the facility would be forced to wind down operations, impacting North America's already constrained copper processing capacity. However, Quebec has now proposed legislative amendments to address some of Glencore's primary concerns. If passed, the bill would grant Glencore additional time to meet stricter emission targets.
The proposed amendments would delay the implementation of a new arsenic emission limit for the Horne Smelter (15 nanograms per cubic meter) by approximately two years to 2029, maintaining it at least until 2033. Although the proposed new limit is one-third of the current permitted level, it remains five times higher than the province's safety standard, a point of contention for many local residents. Glencore has argued that the safety standard is unrealistic. To achieve these lower emissions, Glencore would need to undertake significant upgrades to the Horne Smelter.
The facility has long been controversial, as medical data indicates that residents of Rouyn-Noranda, where the smelter is located, have a higher incidence of chronic obstructive pulmonary disease than the provincial average. The decision regarding the smelter's future is significant for Glencore, particularly given potential environmental remediation costs and litigation that could increase closure expenses. Last year, a class-action lawsuit seeking damages for residents near the smelter was authorized to proceed.
As part of a community emissions reduction plan for Rouyn-Noranda, Glencore has invested approximately CAD 180 million, including purchasing more than 50 residences to create a buffer zone around the plant, with a total of 82 homes slated for demolition. Concurrently, the Canadian federal government is reportedly considering a request for approximately CAD 150 million in financial assistance to help fund the construction of a new pollution control system.
In a statement, Glencore said, "While awaiting regulatory certainty, we are open to evaluating other mechanisms, particularly financial ones, to achieve risk-sharing." The office of Canada's Industry Minister, Mélanie Joly, declined to comment on ongoing discussions with Glencore. A spokesperson, Gabrielle Landry, stated that the smelter is "a strategic asset in our industrial fabric and an important part of our domestic capability," adding that "protecting our industrial pillars is essential, just as protecting the health and safety of Canadians is."
According to the U.S. Geological Survey, the copper smelter has an annual capacity of approximately 215,000 metric tons of copper concentrate and scrap, representing about 16% of North America's annual capacity. Currently, there are only four operating smelters in the United States and one in Mexico. Closing the smelter would also jeopardize Glencore's copper refinery in Montreal, which it supplies. The company stated that around 3,200 direct and indirect jobs could be affected.
Charles Cooper, Head of Copper Research at Wood Mackenzie, described the Horne Smelter as "absolutely critical" to the North American copper market, noting that U.S. smelting and refining capacity cannot meet its domestic demand. According to Glencore, the facility also produces by-products such as gold, silver, platinum, palladium, and other metals, as well as sulfuric acid for fertilizer. Cooper added, "If you lose the Horne Smelter, you lose the entire ecosystem, and then you lose the ability to recycle those critical metals that governments now deem strategic."
Nexans SA, a French wire and cable manufacturer with a rod-rolling plant in the Montreal area, relies heavily on Glencore's refinery for supply. Cooper noted that Nexans has historically purchased up to half of the refinery's cathode copper output. Jonathan Pohu, president of the union representing workers at the Nexans plant, stated that about 100 workers are "completely in the dark about the future" due to Glencore's closure threat. Pohu said, "In the short term, we can source supply from elsewhere, like Mexico, Chile, or even the Congo. But in the medium to long term, this could complicate things, especially as our U.S. customer base has already shrunk, making the plant's operation more difficult."
Comments