Singapore’s air quality has shown significant improvement, with PM2.5 levels returning to the normal range as of October 26. The National Environment Agency (NEA) reported that hourly PM2.5 readings across the island’s five regions ranged from 28 to 40. Additionally, the 24-hour Pollutant Standards Index (PSI) remained in the good-to-moderate band, ranging between 67 and 74.
This development has brought relief to residents who have experienced weeks of hazy conditions. The PM2.5 measurement is crucial as it indicates the level of fine particulate pollution, which can affect respiratory health. The PSI, on the other hand, provides a comprehensive view of air quality by considering six key air pollutants. A PSI reading of 0 to 100 is considered good to moderate, while levels from 101 to 200 are deemed unhealthy.
Looking ahead, the NEA has forecast a moderate PSI of 60 to 90 for October 27, with minimal risk of smoke haze affecting the country. Although smoke haze was observed over Kalimantan, the expected northeasterly or southeasterly winds combined with forecast showers are likely to prevent it from reaching Singapore.
Further weather predictions indicate variable winds and additional showers on October 28 and 29, which are anticipated to help suppress hotspot activity and reduce the likelihood of smoke haze. This wet weather pattern is expected to continue aiding in maintaining manageable air quality levels.
Despite the current improvements, authorities advise residents, especially vulnerable groups such as children, older adults, and those with pre-existing health conditions, to limit outdoor activities if air quality deteriorates to unhealthy levels.