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Ambient concentrations of pollutants in urban areas
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Table 1.11 Ambient concentrations of pollutants in urban areas (1996)
| Urban area | Particulate
matter | SO2(ppb) | NO2(ppb) | Ozone(ppb) |
| | ann avg (ug/m3) | 24 h (ppb) | 24 h (ppb) | 1 h (ppb) |
| Cape Town | 30 | 40 | 80 | 90 |
| Johannesburg | 35 | 60 | 40 | 70 |
| Vereeniging | 50 | 80 | 50 | 80 |
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Site maintained by the Directorate Environmental Information and Reporting
Last update: October 1999
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