Singapore's air quality slides into unhealthy range as PM2.5 spikes

Singapore's air quality is set to deteriorate significantly on Monday, with authorities forecasting that the 24-hour Pollutant Standards Index will fall firmly into the unhealthy band. The National Environment Agency indicated that PSI readings are expected to range from 101 to 190 throughout the day, marking a notable decline from earlier conditions.

The deterioration is being driven by elevated levels of PM2.5, fine particulate matter measuring 2.5 micrometers or smaller, which has spiked across three regions of the island. These microscopic particles can penetrate deep into the respiratory system and pose particular health risks to vulnerable groups including children, the elderly, and individuals with existing respiratory or cardiovascular conditions.

Residents are advised to monitor real-time air quality updates from the NEA and take appropriate precautions. When the PSI enters the unhealthy range, the agency recommends that members of the general public reduce prolonged outdoor activities, while at-risk groups should avoid strenuous outdoor exertion and consider remaining indoors or limiting time outside.

The agency did not specify the anticipated duration of the unhealthy air quality episode. Members of the public can track current and forecast PSI readings through the NEA's air quality monitoring portal and mobile application.