Singapore's air quality stays unhealthy as haze from Sumatra drifts over island

Singapore's air quality persisted in the unhealthy range on Sunday as haze from southern Sumatra and Kalimantan moved toward the island, according to one outlet Environment Agency. The 24-hour Pollutant Standards Index recorded values between 116 and 153 across the country, with the central region having peaked at 192 on Friday, the highest this haze season. One-hour PM2.5 concentrations ranged from 56 to 108, placing them in the elevated band.

NEA warned that the PSI could climb into the very unhealthy range, prompting the Haze Task Force to prepare N95 mask distribution, air-conditioned shelters at community clubs, and possible modifications to school and outdoor activities. Education Minister Desmond Lee said schools may close if the next day's forecast exceeds a PSI of 300, with decisions announced by 8 p.m. the prior evening. Meanwhile, organizers of the Formula 1 Singapore Grand Prix confirmed contingency plans are in place should air quality deteriorate further.