Haze watch: Central Singapore PSI hits 2026 high of 181, nears 'very unhealthy' range
Air quality in the Republic is worsening, with the 24-hour Pollutant Standards Index (PSI) in Central Singapore reaching 181 at noon on Friday (Oct 9), the highest reading recorded so far in 2026.At noon, PSI ranged from 123 in northern Singapore to 181 in the central region.The next highest readings were recorded in western (170) and southern (160) Singapore.PSI readings of between 101 and 200 are in the unhealthy range, while readings from 201 to 300 denote the very unhealthy range.Meanwhile, one-hour PM2.5 concentration entered the high-band in the central (151) region, while remaining in the elevated band in southern (104), northern (113), western (117) and eastern (147) Singapore.On Thursday night, the concentration reading hit the high-band in three regions — western (156), central (163) and eastern (152) Singapore — simultaneously at 11pm.