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Air quality remains in unhealthy range on Monday; 24-hour PSI at 9am: 128-152
[SINGAPORE] Air quality remained in the unhealthy range on Monday (Sept 14) morning following a hazy weekend which kept Singaporeans away from outdoor activities.
The 24-hour Pollutant Standards Index (PSI) at 9am was between 128 and 152. The unhealthy range is 101-200.
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