At 8 am on Oct 27, the one-hour PM2.5 readings in all five regions of Singapore ranged between 17 and 28, within the normal range of 0 to 55. The 24-hour PSI stood between 62 and 71, in the good-to-moderate band.
In its evening advisory on Oct 26, the National Environment Agency (NEA) forecast a PSI of 60 to 90 for Oct 27. It said smoke haze was confined over Kalimantan and that the likelihood of it affecting Singapore on Oct 27 is low, with north-east or south-east winds and showers expected.
What the readings mean for families this week
- The readings follow weeks of bad air quality; over the weekend PM2.5 was normal for most parts of the country, but the 24-hour PSI stayed unhealthy in some areas.
- PSI is a 24-hour rolling average of six key pollutants: 0 to 100 is good to moderate, and 101 to 200 is unhealthy.
- For Oct 28 and 29, NEA forecasts variable winds and showers, which it said should help keep hotspot and smoke haze activity suppressed.
If the PSI goes above 100 again
- Scale down outdoor activities once air quality turns unhealthy, as the haze guidance reported by The Straits Times says, especially for children, the elderly and those with health issues.