PUBLISHED ONSeptember 07, 2026 3:06 AMBYSean LerFor the second consecutive morning in Singapore on Monday (Sept 7), air quality over 24 hours has remained in the moderate range — albeit on the higher end of the range.
At 10am, the central region recorded a 24-hour Pollutant Standards Index (PSI) reading of 92.
Meanwhile, 24-hour PSI readings in the northern, eastern, southern and western regions are 68, 86, 78, and 86 respectively.
Air quality hit the unhealthy range of 100 to 200, for the first time since October 2023, last Friday morning — recording a 24-hour Pollutant Standard Index (PSI) reading of 103.
During that period, 1-hour PM2.5 readings in the central and eastern regions also hit the elevated range.
But the situation improved from Saturday night, with data from the National Environment Agency's (NEA) haze microsite showing that 24-hour PSI readings fell back below the unhealthy range from about 9pm on Saturday.
It has stayed that way since, for now, despite both the central and eastern regions recording elevated 1-hour PM2.5 readings through Sunday evening.
In its daily update on Sunday, NEA forecast Singapore's 24-hour PSI to remain within the high moderate to low unhealthy range.
It also cautioned that Singapore faces a continued risk of transboundary smoke haze should the fires in southern and central Sumatra, as well as West Kalimantan, continue.
Members of the public should note that the health impact of haze is dependent on one's health status, the PSI level, and the length and intensity of outdoor activity.
Those who are planning to conduct or participate in outdoor activities immediately can check the 1-hour PM2.5 concentration readings and vulnerable persons guide.
Meanwhile, those who are planning outdoor activities for the next day should use the 24-hour PSI forecast and the corresponding health advisories for planning.
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