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Oct 2, 2019 · A 24-hour PSI reading of between 51 and 100 falls in the moderate range, for which the public can continue their normal activities. If the PSI reading is in the unhealthy range of 101 to...
Oct 9, 2023 · The 24-hour Pollutant Standards Index (PSI) readings ranged between 67 and 123 at 9pm, with the highest recorded reading in the east. A PSI reading of 101 to 200 is in the unhealthy range, for...
Quick updates at a glance on PSI and PM2.5 readings for the haze situation in Singapore.
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.
A 24-hour Pollutant Standards Index (PSI) reading of between 101 and 200 is considered unhealthy. The index measures six pollutants and is used as an indicator of air quality. People...
Sep 30, 2023 · But Pollutant Standards Index (PSI) readings may deteriorate if the wind shifts, it added. As at 3pm on Friday, the 24-hour PSI was 81, in the moderate range, in the east of Singapore.
