Canadian Council of Ministers
of the Environment

Le Conseil canadien des ministres
de l'environnement

What's New

Canadian Ambient Air Quality Standards for Nitrogen Dioxide

November 3, 2017

The new CAAQS for NO2 will reduce emissions linked to health effects such as decreased lung function, respiratory health problems, particularly for children and adults with asthma, and environmental impacts such as acid rain and smog. The standards for NO2 were developed through a government-led collaborative process that included industry associations, non-governmental organizations and Indigenous organizations.

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