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Glencore accused of discharging copper concentrate dust at Horne smelter

On Aug. 1, 2025, Quebec's Environment Department charged Glencore's Horne smelter with allegedly releasing copper concentrate dust in March 2023 after officials responded on March 7, 2023.
According to the company, wind gusts and low snowfall in 2023 caused an exceptionally dry stockpile, prompting inspections and a cleanup costing several hundred thousand dollars.
Testing showed the snow near Notre-Dame neighbourhood contained high levels of arsenic, cadmium, nickel and lead, and the Quebec Environment Department warned the contaminant is likely harmful to humans and ecosystems.
Regulators ordered the smelter to improve practices and could impose a minimum fine of $30,000, Quebec's Environment Ministry said.
Since then, the Horne smelter has added a dome to store its concentrate and reviewed its stockpile management to prevent a recurrence.

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The Chronicle-Journal

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Glencore accused of discharging copper concentrate dust at Horne smelter in Quebec

ROUYN-NORANDA - Glencore's Horne smelter in western Quebec is facing a charge under the province's environmental laws for allegedly releasing copper concentrate dust into the air in March 2023.

3 days ago

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CBC News

Lean Left

Quebec smelter faces fine after schoolyard covered in arsenic dust

Glencore Canada is accused of discharging copper concentrate dust at the Horne smelter in Rouyn-Noranda, Que., in March 2023. The Environment Ministry says the presence of this contaminant is likely to be harmful to humans.

4 days ago·Canada

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