Recognizing the impact of smog on human health in Canada, in 1991 CCME developed a plan for the management of nitrogen oxides (NOx) and volatile organic compounds (VOCs) – the two families of pollutants responsible for formation of ground level ozone, a major component of smog. As an element of this plan, CCME has developed and published more than 16 codes of practice and guidelines for the reduction of VOCs and NOx from various targeted sectors or sources. Please see our publications page for a listing of the documents available related to NOx/VOC guidelines and codes of practice.
Canada-wide standards (CWS) for particulate matter (PM 2.5) and ground-level ozone were endorsed by environment ministers in June 2000 to address the health and environmental impacts of these substances, and as a key tool for smog reduction. The CWS for ground-level ozone is set at 65 ppb averaged over 8 hours, to be achieved by all Canadian jurisdictions by 2010. The Canada-wide Standard for the fine fraction of PM, smaller than 2.5 microns, is 30 mg/m3 averaged over 24 hours, to be achieved by 2010.