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  Ambient Air Quality

 

Hazy Conditions Update

(Updated on 30 January 2012)

Northeast Monsoon conditions are expected to prevail over the region till March 2012, with low level winds blowing predominantly from the northeast or northwest. The region is currently in the dry phase of the Northeast Monsoon season. While sporadic increases in hotspot activities can be experienced during brief periods of drier weather conditions, the hotspot situation over Sumatra is likely to remain subdued. Singapore is thus unlikely to be affected by significant transboundary haze. Singapore may however experience brief slight haziness from time to time, especially in the morning. This is due to the accumulation of particulate matter under light wind conditions and/ or mist, and would usually clear later in the day.

The PSI will be updated on this website daily at 4pm.

 

 


24-hr PSI Readings At 4 PM on 03 Feb 2012

Region 24-hour Sub-Index at 4 PM on 03 Feb 2012 PSI* Air Quality Descriptor Responsible Pollutant
Sulphur Dioxide PM10 Ozone Carbon Monoxide Nitrogen Dioxide+
North 7 25 8 3 - 25 Good PM10
South 4 18 15 5 - 18 Good PM10
East 7 22 8 5 - 22 Good PM10
West 5 23 11 8 - 23 Good PM10
Central 5 21 3 3 - 21 Good PM10
Overall Singapore* 7 25 15 8 - 25 Good PM10
 
 

 

Note:

The PSI value gives an indication of the air quality as shown:

PSI Value       Air Quality Descriptor
 0 - 50              Good
 51 - 100          Moderate
 101 - 200        Unhealthy
 201 - 300        Very unhealthy
 Above 300      Hazardous

+Sub-index for Nitrogen Dioxide is reported only when the one-hour Nitrogen Dioxide concentration exceeds 1130 µg/m3.

*Based on the highest indices in accordance with the USEPA guidelines for PSI reporting.

  

View Current & Previous Month 24-hr PSI Readings for Singapore

 
   
 
 

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