SINGAPORE – The haze situation here eased slightly on Oct 11 even as the air quality across the island remained in the unhealthy range.
At 9am, the 24-hour Pollutant Standards Index (PSI) readings stood at 118 in the north, 115 in the south, 138 in the east, 152 in the west and 151 in the central region.
This marks a slight improvement from a day before when the PSI value peaked at 183 in the central region at midnight before gradually dropping throughout the day.
Air quality is considered unhealthy when the PSI – a 24-hour rolling average of six key air pollutants – is in the range of 101 to 200.
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