3hr PSI reading crosses into unhealthy range at 3pm on Sunday (Nov 2)

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Singapore's air quality reached unhealthy levels on Sunday (Nov 2), after days of relatively clear skies. The three-hour Pollutant Standards Index (PSI) hit a high of 127 at 9pm before inching down to 126 at 10pm.

The three-hour PSI reading moved up sharply after 11am, edging past 100 to 104 at 3pm, after it remained below 70 for the previous few hours.

Last month, the Meteorological Service Singapore (MSS) had said that there will likely be more rain over Singapore and the surrounding region in the coming weeks, when the traditional dry season comes to an end for the year.

Singapore may still experience occasional slight haze on some days due to the accumulation of particulate matter in the air under light wind conditions.