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Central region air quality dips to unhealthy levels as PSI hits 102

Air quality in the central region has deteriorated to unhealthy levels, with a 24-hour Pollutant Standards Index (PSI) reading of 102 recorded. Other regions maintained moderate air quality ratings as of 9pm.

LSN Singapore · 17 September 2026

Central region air quality dips to unhealthy levels as PSI hits 102

The central region's air quality has slipped into the unhealthy range, marking a concerning shift in regional atmospheric conditions. The 24-hour PSI reading of 102 indicates a notable degradation from safer air quality levels, prompting increased monitoring of the situation.

In contrast, air quality readings across the northern, southern, eastern and western regions remained within the moderate range as of 9pm, suggesting the pollution concentration is primarily affecting the central area.

The PSI scale, which measures concentrations of fine particulate matter and other air pollutants, categorises readings above 100 as unhealthy. Individuals with respiratory conditions and elderly residents are typically advised to limit outdoor activities and consider using air filters when air quality enters this range.

Realtime monitoring efforts continue as authorities track atmospheric conditions across the region. The disparity between central and surrounding areas suggests localised pollution sources or weather patterns may be concentrating pollutants in the central zone.