SINGAPORE: Air quality across Singapore improved to the moderate range on Saturday (Sep 5), after three regions recorded unhealthy 24-hour Pollutant Standards Index (PSI) readings earlier in the day.
As of 11pm, the central region recorded a 24-hour PSI of 93, down from a peak of 123 at 1am, according to the National Environment Agency (NEA).
The west and east regions also returned to the moderate range, recording PSI readings of 88 and 78 respectively at 11pm.
Earlier in the day, both regions had entered the unhealthy range, with the west recording a PSI of 103 and the east 102 at 6am.
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