Air quality back at unhealthy levels in central, western Singapore

Air quality in central and western Singapore has returned to unhealthy levels, according to data recorded at 1:00 p.m. The 24-hour Pollutant Standards Index (PSI) in the central region reached a reading of 102, crossing the threshold into the unhealthy range.

This shift in air quality marks a notable change in local environmental conditions. Authorities monitor the PSI to track particulate matter levels, with readings above 100 indicating a level that may affect sensitive groups.