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Source: Asia Pacific Region 2 – Singapore

Air Quality

The 1-hr PM2.5 concentration readings over the next 24 hours are expected to range between Band I (Normal) and Band II (Elevated). The PSI for the next 24 hours is forecast to be in the high end of the Moderate range and may enter the Unhealthy range if denser haze is blown in.

Health Advisory

Given the air quality forecast for the next 24 hours, healthy persons should reduce prolonged or strenuous outdoor physical exertion. The elderly, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while those with chronic lung or heart disease should avoid prolonged or strenuous outdoor physical exertion. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

Singapore, 13 September 2019 – Slightly hazy conditions have been persisting in Singapore today as smoke haze from central and southern Sumatra continues to be blown in by the prevailing winds. For the rest of the day, hazy conditions are expected to persist and the prevailing winds are forecast to blow from the south or southwest. As at 6pm, the 24-hr PSI was 88 – 98, in the Moderate range, and the 1-hr PM2.5 concentration readings were 48 – 69 µg/m3, in Band I (Normal) and Band II (Elevated).

2         The weather continues to be dry over most parts of the region today, including Sumatra and Kalimantan. A total of 156 hotspots were detected in Sumatra, mostly in the central and southern parts of the island. Moderate to dense smoke haze continued to emanate from persistent hotspots there, and hazy conditions persisted in Singapore and some parts of Peninsular Malaysia. In Kalimantan, a total of 1,043 hotspots were detected today. Widespread smoke haze continued to be observed over many areas in Kalimantan, and some haze has been blown by the prevailing winds to western Sarawak and surrounding sea areas.

3         For the next few days, there may be brief showers in Singapore but the weather over Sumatra and Kalimantan is forecast to remain generally dry. With the prevailing winds blowing from the south or southwest, this may bring increased haziness to Singapore. For the next 24 hours, the 1-hr PM2.5 concentration readings are expected to range between Band I (Normal) and Band II (Elevated), and the 24-hr PSI is forecast to be in the high end of the Moderate range and may enter the Unhealthy range if denser haze is blown in.

4          NEA is monitoring the situation closely and will provide further 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. When the PSI is in the Unhealthy range, 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, healthy persons should reduce prolonged or strenuous outdoor physical exertion. The elderly, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while those with chronic lung or heart disease should avoid prolonged or strenuous outdoor physical exertion. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

6          Air quality indicators and health advisories during periods of transboundary haze refer primarily to the 24-hour PSI. There are no accompanying health advisories for any other air quality indicators. In addition, the main air pollutant during the haze season is PM2.5. Hence, the 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). For information on the distribution of hotspots detected over the past fortnight in the region, please refer to the ASEAN Specialised Meteorological Centre (ASMC) website at asmc.asean.org.

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MIL OSI Asia Pacific News