Arsenic emissions in Rouyn-Noranda |  Quebec sets limit at 15 ng/m⁠3 within five years

Arsenic emissions in Rouyn-Noranda | Quebec sets limit at 15 ng/m⁠3 within five years

Rouyn-Noranda airborne arsenic concentrations resulting from emissions from the Horne foundry must be limited to 15 nanograms per cubic meter (ng/m⁠3) within five years, Quebec announced Monday.

Posted 11:07am Updated 1:40pm

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Jean Thomas Leveille

Jean-Thomas Léveillé The press

The new threshold, which is almost seven times lower than the current limit of 100 ng/m⁠3, must be “achieved at the end of the period covered by the renewal of the authorisation [ministérielle] of the facility, said the Ministry of Environment and Combating Climate Change (MELCC).

“This would be an important first step in bringing it into line with the Quebec standard of 3 ng/m⁠3,” states the ministry in a press release issued on the sidelines of Minister Benoit Cart’s announcement.

The MELCC supports the Public Health recommendation of 10 August.

However, it grants Horne Foundry, part of the multinational Glencore, a longer adaptation period than requested in particular by the Stopping Discharges and Toxic Emissions (ARET) Committee, which wanted to reach the limit of 3 ng/m3 within 5 years.

More details to come.

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  • 1170 ng/m⁠3 record levels of arsenic in the air measured in 2021 near the Horne Smelter

    Source: Ministry of Environment and Combating Climate Change

    1927 Year of the start of the activities of the Horne smelter, which also had a mine until 1976

    Source: Horne Foundry