HAZE SITUATION UPDATE
(1 OCTOBER 2016)

 


Air Quality

The 1-hr PM2.5 concentration over the next 24 hours is expected to stay in Band I (Normal). Overall, the PSI for the next 24 hours is forecast to be in the Moderate range.

Health Advisory

Given the air quality forecast for the next 24 hours, everyone can continue with normal activities. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

Singapore, 1 October 2016 – Showers affected some parts of Singapore in the late morning and early afternoon today. For the rest of the day, partly cloudy conditions can be expected, and the prevailing winds are forecast to continue blowing from the west or west-northwest. As at 5pm today, the 24-hr PSI was 55-62, in the Moderate range, and the 1-hr PM2.5 concentration readings were 11-24 µg/m3, in Band I (Normal).

2          There were no hotspots detected in Sumatra today due to a partial satellite pass[1] and cloud cover.

3          For tomorrow, the prevailing winds are forecast to blow from the west-southwest or west-northwest, and thundery showers are expected over parts of Singapore in the late morning and early afternoon. The 1-hr PM2.5 concentration over the next 24 hours is expected to stay in Band I (Normal). Overall, the PSI for the next 24 hours is forecast to be in the Moderate range.

4          For the next few days, the prevailing winds are forecast to blow from the southwest or west. Dry weather conditions are expected over parts of Sumatra. There is a possibility that Singapore could experience slightly hazy conditions if hotspot activities increase in Sumatra. NEA will monitor closely and provide updates when necessary.

5          The health impact of haze is dependent on one’s health status, the PSI level, and the length and intensity of outdoor activity. Reducing outdoor activities and physical exertion can help limit the ill effects from haze exposure. Given the air quality forecast for the next 24 hours, everyone can continue with normal activities. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

6          NEA has introduced bands and descriptors for 1-hr PM2.5 concentration readings this haze season. During the haze season, the main air pollutant is PM2.5. 1-hour PM2.5 concentration readings are a good indicator of the current air quality. Use this for immediate activities like going for a jog.

7          For updates, visit our NEA website (www.nea.gov.sg), MSS website (www.weather.gov.sg), the haze microsite (www.haze.gov.sg), mobile apps (myEnv and Weather@SG) or follow us on NEA Facebook (www.facebook.com/NEASingapore) and NEA Twitter (@NEAsg).



 

[1] A partial satellite pass occurs when the satellite field of view covers only part of a region of interest as the satellite orbits the earth.


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For more information, please contact us at 1800-CALL NEA (1800-2255 632) or submit your enquiries electronically via the Online Feedback Form or myENV mobile application.


PSI Updates
at 7pm on 01 Oct 2016

24-hr PSI: 55 - 63
3-hr PSI: 56
1-hr PM2.5 (µg/m3): 7 - 17
Band I (Normal)
59
North
55
West
61
Central
58
East
63
South

Note: Air quality based on PSI is as follows:

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

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