Air quality in central Singapore approaches unhealthy range, with PSI at 100

Readings in other regions remain in the moderate range. Read more at straitstimes.com.

The Straits TimesAnn Chen2026-09-09 22:03查看原文 ↗

Haze in the south region at around 10.45am seen from Spottiswoode Park on Sept 4.

ST PHOTO: JASON QUAH

Published Sep 09, 2026, 10:03 PM

Updated Sep 09, 2026, 10:04 PM

SINGAPORE – Air quality in central Singapore has approached the unhealthy range, with 24-hour Pollutant Standards Index (PSI) in the region standing at 100 as at 10pm on Sept 9.

Readings in the other regions remained in the moderate range.

Haze in Singapore began observing an uptick again recently when the PSI in the central part crossed 101 early on Sept 4.

Since then, readings in central, eastern and western parts of Singapore have occasionally crossed into the unhealthy range before dipping back into the moderate spectrum.

In an advisory on Sept 9, the National Environment Agency (NEA) said the 24-hour PSI is forecast to range from higher end of the moderate category to the lower end of the unhealthy spectrum.

NEA added that it continues to observe moderate to dense smoke plumes from fires in southern and central Sumatra as well as Kalimantan, adding that some haze also drifted towards Singapore.

“With prevailing winds blowing from the south-east or south, there remains a risk of smoke haze affecting Singapore should the fires persist,” the agency said.

The recent developments mark the first time PSI in Singapore hit unhealthy levels due to haze since October 2023.

Air quality is considered unhealthy when the PSI is in the range of 101 to 200, during which NEA advises the public to cut down on outdoor activities.

PSI readings of 51 to 100 are considered moderate, while values of 0 to 50 are in the “good” range.

National Environment Agency

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