An investigation into the strong sulphur-like smell reported across parts of Gauteng suggests the odour may be drifting into the province from neighbouring Mpumalanga.
Over the past few days, residents have reported a strong smell in the air, describing it as similar to rotten eggs, burning sulphur or even cat urine.
According to the Gauteng Department of Environment, preliminary findings indicate that no facilities within the province were responsible for the widespread odour. The department conducted site inspections, air quality monitoring and meteorological assessments but did not identify any local source.
Air quality data from the Three Rivers monitoring station showed prevailing winds during the period blowing from the east and north east, pointing to the possibility that pollutants may have travelled from Mpumalanga into southern parts of Gauteng.
Officials believe the smell is likely linked to hydrogen sulphide, a gas known for its strong rotten egg odour that can be detected even at very low concentrations.
While the smell may cause temporary discomfort for some people, including headaches or nausea, authorities say the concentrations detected are not expected to pose significant health risks.
The matter has been referred to the national Department of Forestry, Fisheries and the Environment for further investigation.
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