Smoke haze may affect Singapore till Saturday, condition expected to improve on Sunday: NEA
Air quality in Singapore improved from 3pm on Thursday (Oct 22), with islandwide 24-hour Pollutant Standards Index (PSI) in the moderate range, while hourly PM2.5 were in the normal band in all five regions.Thursday also marks the first time in 18 days that PSI readings in western Singapore returned to the good-to-moderate range.At 8pm, PSI ranged from 71 in the northern region to 89 in western Singapore. Readings of between 0 to 100 are in the good-to-moderate range.Meanwhile, hourly concentration readings were lowest in northern (29µg/m3) Singapore and highest (54µg/m3) in the western region.According to the National Environment Agency (NEA), smoke haze from Kalimantan and Sumatra was still observed over the surrounding region. However, it remained to the south of Singapore due to the north-easterly and easterly winds."There was some smoke haze at higher altitudes above Singapore but limited mixing to surface levels," NEA said.Members of the public should check the latest PM2.5 readings before participating in outdoor activities.