Central Singapore air quality slips into unhealthy range as PSI reaches 101

Air quality monitoring in central Singapore recorded a PSI of 101, placing the city-state's air quality squarely within the unhealthy range for the first time in recent days. The Pollutant Standards Index, which measures concentrations of five key pollutants, uses 101 to 200 as the threshold for unhealthy air conditions.

When air quality reaches unhealthy levels, members of the general public may begin to experience health effects, while those in vulnerable groups—including children, the elderly, and individuals with pre-existing respiratory or cardiovascular conditions—face heightened risk. Health authorities typically recommend that at-risk populations limit prolonged outdoor activities during such periods.

The reading reflects broader air quality trends affecting the region, with transboundary haze and local emissions contributing to degradation in atmospheric conditions. Residents are advised to monitor official air quality updates and take appropriate precautions if they belong to vulnerable demographic groups.

The National Environment Agency continues to track air quality metrics across Singapore and provides real-time PSI updates to help the public make informed decisions about outdoor activities.