There remains a risk of smoke haze affecting Singapore, with the 24-hour PSI forecast to be in the high-moderate to low-unhealthy range, the National Environment Agency said on Saturday.

The 24-hour PSI reached 102 in the central region at 11am on Saturday.

The 24-hour PSI entered the unhealthy range in the central region at 11am on Saturday.

As of 9pm, the PSI readings for the central, southern and western regions were 108, 105 and 101 respectively.

The 24-hour Pollutant Standards Index (PSI) in the region hit 104 at 8pm.

The 24-hour Pollutant Standards Index (PSI) in the central region entered the unhealthy range at 8pm on Saturday (Sep 26).

The 24-hour Pollutant Standards Index (PSI) in the central region entered the unhealthy range at 8pm on Saturday (Sep 26).

The eastern region entered the unhealthy range at midnight on Sunday, with a PSI reading of 103.

The eastern region entered the unhealthy range at midnight on Sunday, with a PSI reading of 103.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

PSI readings have dipped in and out of the unhealthy range over the past weeks.

The 24-hour Pollutant Standards Index (PSI) hit 105 in the west and 102 in the east at 6am. The central region, which entered the unhealthy range a day earlier, recorded a reading of 123.

The 24-hour Pollutant Standards Index (PSI) for the eastern and western regions also entered the unhealthy band on Sunday (Sep 20) morning, although they later returned to moderate range.