On January 21, 2023, according to the Official Gazette of Canada, Health Canada issued a limit guideline for Malathion in drinking water. The maximum acceptable concentration (MAC) of Malathion in drinking water is 0.29 mg / L.
See more: https://www.canadagazette.gc.ca/rp-pr/p1/2023/2023-01-21/html/notice-avis-eng.html#ne1
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