Haze watch Oct 15: PM2.5 in central Singapore hits 205, 4 regions in high band
Just two hours after air quality in Singapore improved slightly on Thursday (Oct 15) afternoon, PM2.5 readings are up again — hitting 205µg/m3 in the central region at 5pm.The central one-hour PM2.5 reading had earlier eased from a high of 197 at 10am to 144 at 2pm, before climbing again from 3pm onwards. Elsewhere, concentration readings are in the high band in the eastern (161), southern (157) and western (155) regions.Only northern Singapore remains in the elevated band (56 to 150µg/m3).The 24-hour Pollutant Standards Index (PSI) ranges from 122 in the northern region to 188 in western Singapore.The next highest reading of 186 was recorded in central Singapore at 5pm.Meanwhile, a total of 38 outdoor and non-aircon ActiveSG facilities across the eastern and central regions remain closed as a precautionary measure, according to a 2.30pm update posted by Sport Singapore on the ActiveSG Circle website.