SINGAPORE, Sept 10 — Air quality in central Singapore returned to the unhealthy range, with the 24-hour Pollutant Standards Index (PSI) reaching 105 at 8am today, according to the National Environment Agency (NEA).
CNA reported that the PSI in the central region stood at 102 at 11pm yesterday before rising to 104 at 6am today, while readings in other parts of the island remained moderate.
NEA said smoke plumes ranging from moderate to dense continued to be detected from fires in southern and central Sumatra and Kalimantan, with some haze drifting towards Singapore.
The agency said showers were expected over parts of central and northern Sumatra in the coming days, but dry conditions were likely to continue in Kalimantan and southern Sumatra, increasing the risk of haze if fires persisted.
NEA forecast Singapore’s 24-hour PSI to remain in the high-moderate to low-unhealthy range.
Air quality first entered the unhealthy range this year on September 4, when the PSI in central Singapore climbed to 123, the highest reading recorded there since 2023.
The unhealthy conditions continued into September 5 before the PSI returned to the moderate range at 9pm that day.
NEA began issuing daily haze advisories from the evening of September 4 following the deterioration in air quality.
A PSI reading of 101 to 200 is classified as unhealthy, while readings between 201 and 300 are considered very unhealthy and those above 300 hazardous.
