SocietySingapore air quality enters unhealthy range in central and eastern regions as 24-hour PSI tops 100

Air quality in Singapore’s central and eastern regions entered the unhealthy range at 9pm on Sep 4, with the 24-hour PSI exceeding 100 for the first time since 2023. The National Environment Agency will provide daily haze updates and warned that transboundary haze could persist in the coming days; forecasts put the PSI as high as the unhealthy range.