Moderate air quality persisted across all four districts in Brunei Darussalam at 11am, 2pm and 4pm yesterday.
At 4pm, Temburong recorded the highest Pollutant Standards Index (PSI) reading at 76, followed by Brunei-Muara at 70, Tutong at 58 and Belait at 57.
At 7am, Brunei-Muara, Belait and Temburong recorded moderate air quality, with Brunei-Muara registering the highest PSI reading of 83. Tutong remained in the good range, with a PSI reading of 43.
By 9am, air quality in all four districts had moved into the moderate range, with Brunei-Muara continuing to record the highest PSI reading at 80. The Department of Environment, Parks and Recreation (JASTRe), under the Ministry of Development, has enhanced Brunei Darussalam’s air quality monitoring by incorporating fine particulate matter (PM2.5) concentrations into the PSI reporting, effective on September 1, 2026.
According to JASTRe, PM2.5 refers to fine suspended particles with a diameter of less than 2.5 micrometres, as defined by the World Health Organization.
These particles can penetrate deep into the lungs and enter the bloodstream, potentially causing adverse effects on the cardiovascular and respiratory systems.
During the haze period, JASTRe will continue to closely monitor air quality nationwide and provide PSI updates five times daily, at 7am, 9am, 11am, 2pm and 4pm.
Meanwhile, the Ministry of Health (MoH) advised that outdoor activities may continue as usual when PSI readings are within the moderate range of 51 to 100.
However, children, pregnant women and the elderly are advised to reduce strenuous or prolonged outdoor physical activities, while individuals with heart or lung conditions should limit such activities.
Those experiencing persistent or worsening symptoms, including coughing, shortness of breath, chest discomfort or breathing difficulties, are advised to seek immediate medical attention at nearby clinics or health centres.
The public is also encouraged to refer to health advisories issued by MoH for further guidance.
In view of the dry conditions, the public is reminded to refrain from open burning and other activities that could worsen haze conditions.
Anyone who encounters bush or forest fires should contact the Fire and Rescue Department through its emergency hotline at 995.
The public can also call the Darussalam Hotline 123 to lodge complaints about open burning or seek health information and advice.
SOURCE/AUTHOR : BORNEO BULLETIN/Lyna Mohamad
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