Singapore haze: Air quality remains unhealthy in most regions; PM2.5 readings normal across country

Singapore experienced unhealthy air quality across the country due to haze, with 24-hour Pollutant Standards Index (PSI) readings consistently remaining above the threshold of 100 throughout the early morning hours. Data from Channel NewsAsia tracked slight fluctuations in air pollution metrics between 6am and 8am.

At 6am, the 24-hour PSI readings ranged from 105 to 142 alongside elevated hourly PM2.5 readings between 58 and 78. By 7am, the PSI ranged from 104 to 140 with hourly PM2.5 readings dropping to between 44 and 62, indicating elevated levels in two regions. By 8am, the 24-hour PSI readings shifted slightly to a range of 103 to 138, while hourly PM2.5 readings returned to normal levels across all regions, ranging from 43 to 55.