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SINGAPORE – The air quality in Singapore worsened on Sunday (Sept 15) morning as Pollutant Standards Index (PSI) readings crossed the unhealthy level in all parts of the island.
The 24-hour PSI reading for the north, south, east, central and west entered the unhealthy range at 1am.
At 8am, the 24-hour PSI readings ranged between 107 in the east and 124 in western Singapore. At 9am, the reading was between 107 and 123.
A PSI reading of 101 to 200 is in the unhealthy range, for which the National Environment Agency (NEA) advises the public to cut down on outdoor activities.
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