Air quality in Singapore saw significant improvement on October 26 as PM2.5 levels returned to the normal range, offering relief to residents after weeks of haze. The National Environment Agency reported that one-hour PM2.5 readings across Singapore’s five regions were between 28 and 40, while the 24-hour Pollutant Standards Index (PSI) remained in the good-to-moderate range of 67 to 74.
PM2.5 readings measure fine particulate pollution, an important factor in assessing air quality. The PSI, which ranges from 0 to 100 for good to moderate air quality, reflects the impact of six key air pollutants. Readings between 101 and 200 indicate unhealthy conditions. Fortunately, the agency forecasts a moderate PSI of 60 to 90 for October 27, with little risk of smoke haze from nearby regions affecting Singapore due to expected northeasterly or southeasterly winds and forecast showers.
The respite comes as weather forecasts suggest variable winds and further showers on October 28 and 29, which are likely to suppress hotspot activity and further diminish the risk of smoke haze impacting the area. This is particularly relevant as smoke haze was observed over Kalimantan, though it is not expected to reach Singapore.
Despite the improvement in air quality, authorities advise residents, especially children, the elderly, and those with existing health conditions, to limit outdoor activities should air quality worsen and reach unhealthy levels. Continuous monitoring and timely updates from the National Environment Agency will help residents stay informed about air quality conditions.