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  1. During periods of haze, you can use the health advisory, air quality forecast, 1-hr PM2.5 and daily PSI readings to plan your schedule.

  2. Singapore experiences haze from time to time, usually caused by forest fires in the region. It can be made worse by dry seasons, changes in wind direction, and when rainfall is low. The Pollutant Standards Index (PSI) measures the air quality and indicates the severity of haze.

  3. Quick updates at a glance on PSI and PM2.5 readings for the haze situation in Singapore.

  4. In general, a healthy individual who has to be outdoors for several hours may wear a N95 mask to reduce exposure when the forecasted air quality is in the Hazardous range (PSI >300), although the first line of action to avoid haze exposure would be to limit time spent outdoors.

  5. Oct 2, 2019 · There are four bands on the PM2.5 concentration scale: 0 to 55 for normal, 56 to 150 for elevated, 151 to 250 for high, and very high for any higher readings. A 24-hour PSI reading of between 51...

  6. Sep 19, 2019 · The 24-hour Pollutant Standards Index (PSI) is computed based on six air pollutants - PM2.5, PM10, ozone, sulphur dioxide, nitrogen dioxide and carbon monoxide. It was developed as an...

  7. Oct 6, 2023 · At of 4pm, the 24-hour Pollutant Standards Index (PSI) for the eastern and central regions of Singapore were 119 and 110 respectively. The National Environment Agency (NEA) regards a reading of...

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