Singapore PSI and haze
See the PSI right nowAir quality, region by region
See the PSI and PM2.5 reading for the north, south, east, west and central regions, laid out like a compass so you can find your side of the island at a glance. Each reading comes with its band, such as Good or Moderate, so you do not need to remember the numbers.
What the PSI bands mean
- Good: 0 to 50
- Moderate: 51 to 100
- Unhealthy: 101 to 200
- Very unhealthy: 201 to 300
- Hazardous: above 300
Regional haze
The card also shows fire hotspots detected by NASA satellites around the region, which helps explain why haze may be on its way. When the PSI turns Unhealthy, thisis.sg moves air quality to the top of your Home screen.
Common questions
Where does the PSI come from?
The National Environment Agency (NEA), with hotspot data from NASA FIRMS. thisis.sg is an independent app and is not run by NEA.
Which reading should I look at?
Use the region you are in. The PSI can differ between the north and the south on the same hour.
Do I need an account?
No. Air quality is free to view without signing in.