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In terms of Section 24 of the Constitution, as well as the National Environmental Air Quality Act (AQA, 2004), government is charged with the role to ensure that South Africans are breathing air that is not harmful to their health and wellbeing. Several spheres of government monitor the state of air quality across the country at over 130 fully automated air quality monitoring stations (Figure 1). These stations monitor a range of pollutants including ozone (O3), particulate matter (both PM10 and PM2.5), carbon monoxide (CO), sulphur dioxide (SO2), and oxides of nitrogen (nitrogen dioxide NO2, and nitric acid NO), lead (Pb), hydrogen sulphide (H2S), black carbon (elementary carbon) and meteorological parameters. The stations form the National Ambient Air Quality Monitoring Network (NAAQMN) and are located in areas with the highest density of people in order to measure human exposure to air pollution. The stations provide critical information to assess compliance with ambient air quality standards and to assess the impact of intervention strategies aimed at addressing air pollution. In addition, data from these monitoring stations also provide valuable information regarding the state of ambient air quality to which the citizens of the Republic are exposed.

South African Air Quality Information System (SAAQIS) mobile application tool: bringing real time state of air quality to South Africans