PSI in western Singapore hits 102, joins central region in having unhealthy air

The West crossed the 101 threshold at approximately midnight, checks by The Straits Times showed.

The PSI for the East had moved into the unhealthy level at about 9pm on Sept 4 where it had remained before dipping at 7am on Sept 5.

The Sept 5 PSI reading means the Central region of Singapore has now had unhealthy levels of pollutants in the air for over a day.

The last time the PSI hit unhealthy levels due to haze was in October 2023.

In a Sept 4 advisory, the NEA said the haze could persist till Sept 5, with air quality forecast to be between the higher end of the moderate and the middle of the unhealthy range.

The agency said smoke plumes from fires in the southern and central parts of Sumatra and various parts of Kalimantan were observed to be drifting towards Singapore.

As dry conditions are forecast for the coming days, Singapore may continue to be affected by transboundary haze if the wind direction remains unchanged as the fires persist.