SINGAPORE: Air quality remained unhealthy across most of Singapore on Sunday (Oct 25), with only the south recording a 24-hour Pollutant Standards Index (PSI) reading in the good to moderate band.
At 10am, the reading in the south stood at 100, having dropped out of the unhealthy range. Readings in the other regions of the country were in the unhealthy band, ranging from 107 to 132.
Hourly PM2.5 readings, meanwhile, were in the normal band in all five regions, ranging from 31 to 48.
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