Singapore’s air quality has improved, moving back into the good-to-moderate range on October 22 after 18 consecutive days of unhealthy conditions due to haze. At 3 p.m., the 24-hour Pollutant Standards Index (PSI) registered between 71 and 99 across the island, enabling residents to resume regular outdoor activities.
The western region of Singapore was the last area to exit the unhealthy category, with its PSI falling from 101 to 99. The country had been experiencing poor air quality since October 5, when readings first exceeded the 101 threshold.
Throughout the island, fine particulate matter, known as PM2.5, remained within normal limits. At 3 p.m., one-hour PM2.5 readings ranged from 16 to 39 micrograms per cubic meter.
Despite the recent improvements in air quality, the haze situation in the region remains a concern. Satellite data continue to identify hotspots in Indonesia, although prevailing winds have so far directed much of the smoke away from Singapore. Other areas, including parts of Peninsular Malaysia, Kalimantan, Sumatra, and western Sarawak, have been experiencing more severe pollution levels.