Air quality in Singapore saw a notable improvement on October 26 as hourly PM2.5 levels returned to the normal range, providing relief to residents after enduring weeks of hazy conditions. The 24-hour Pollutant Standards Index (PSI) also remained within the good-to-moderate range across the island, with PSI readings between 67 and 74.
At 6 p.m., the one-hour PM2.5 readings across Singapore’s five regions measured between 28 and 40. The PM2.5 readings are crucial as they indicate the level of fine particulate pollution in the air. A PSI of 0 to 100 is categorized as good to moderate, while a reading from 101 to 200 signifies unhealthy air quality.
The National Environment Agency has forecasted a moderate PSI range of 60 to 90 for October 27. Although smoke haze was detected over Kalimantan, the agency assessed that it is unlikely to affect Singapore due to anticipated northeasterly or southeasterly winds and predicted showers.
Further weather forecasts predict variable winds and additional showers on October 28 and 29. Such wet conditions are expected to help suppress any hotspot activity and lower the risk of smoke haze reaching Singapore.
Authorities have advised that if air quality were to decline to unhealthy levels, residents, particularly children, older adults, and individuals with pre-existing health conditions, should minimize outdoor activities to reduce health risks.