Johannesburg – The Department of Forestry, Fisheries and the Environment (DFFE) says it is attending to reports of a strong sulphurous odour detected in various parts of Gauteng, particularly in Ekurhuleni and Johannesburg.
The department received reports of the strong sulphurous odour in Gauteng on Tuesday, 10 March 2026.
In a statement made available to The Burushes on Thursday, 12 March 2026, the department stated that the “stench experienced by residents in these areas is likely caused by hydrogen sulfide (H₂S). DFFE wishes to assure the public that the matter is receiving attention”.
The department revealed that air quality monitoring information from the South African Air Quality Information System (SAAQIS https://saaqis.environment.gov.za/) showed that levels of sulphur dioxide, while elevated, remained in compliance with National Ambient Air Quality Standards during this period.
The department said for hydrogen sulphide, monitoring data also showed elevated peaks, especially in Secunda, Springs, Irene (Pretoria), Midstream, and Buccleuch air quality monitoring stations.
“Although there is no National Ambient Air Quality Standards for hydrogen sulphide for now, these pollution levels were all significantly higher than the World Health Organisation recommended threshold for ambient nuisance odour of 5.02 parts per billion,” stated the department.
“Based on these observations, it is highly likely that complaints raised by the public were prompted by elevated levels of hydrogen sulphide.”
Meteorological conditions show prevailing south-easterly winds that allowed for the transportation of air pollution from Mpumalanga into Gauteng, particularly over the cities of Ekurhuleni, Johannesburg, and Pretoria.
Health Effects of Hydrogen Sulphide (H₂S)
Exposure to hydrogen sulphide may cause irritation to the eyes and respiratory system. Other possible health effects include:
dizziness
headaches
nausea and stomach upset
weakness and irritability
breathing difficulties
In severe cases, high exposure may lead to convulsions, loss of consciousness, or respiratory complications.
Children may be particularly vulnerable because they breathe more rapidly relative to their body size and may therefore receive higher exposure levels than adults in the same environment.
The Department therefore urges members of the public in affected areas to:
- Report persistent strong odours to local environmental health authorities or health authorities.
- Avoid prolonged exposure if strong odours are present.
- Seek medical attention if experiencing persistent respiratory discomfort or irritation.
The department said it will continue to monitor the situation closely and work with provincial and municipal authorities to identify the sources of emissions and ensure compliance with environmental regulations.
