PSI readings remain above 100 as smoke from Kalimantan and Sumatra reaches Singapore.
Singapore’s haze persisted on October 6, with unhealthy air recorded across most of the island as dry weather and smoke from Indonesia continued affecting the city-state.
Entire Island Enters Unhealthy Range
At 6 a.m. on October 6, 2026, the north, east, west and central regions recorded 24-hour PSI readings of 107, 112, 117 and 130 respectively, placing them in the unhealthy range. The south remained in the moderate range at 95. Air quality is classified as unhealthy when the 24-hour PSI is between 101 and 200.
Central Singapore Records Highest Readings
Earlier at 6 a.m., central Singapore had the highest PSI at 130, followed by the west at 117, east at 112 and north at 107, while the south remained moderate at 95. The entire island had also briefly recorded unhealthy air between 9 p.m. and midnight on October 4, when central Singapore peaked at a PSI of 136.
PM2.5 Levels Remain Elevated
Fine-particle pollution was also elevated in parts of Singapore. At 6 a.m., hourly PM2.5 readings were elevated in the east, west and central regions at 56, 59 and 60 respectively, while readings in the south and north remained within the normal band at 35 and 48. Singapore uses hourly PM2.5 readings as a guide for immediate outdoor activities.
Smoke Continues From Indonesia
The National Environment Agency said dry conditions were expected to persist over Kalimantan and southern Sumatra, where moderate to dense smoke plumes had been observed drifting toward Singapore. Prevailing winds were forecast to blow from the southeast or east-southeast, while the 24-hour PSI was expected to remain between the high-moderate and mid-unhealthy range.
Haze Season Could Continue Longer
Singapore’s haze conditions have repeatedly deteriorated since the PSI first crossed into the unhealthy range on September 4, with the year’s highest reading of 164 recorded in central Singapore on September 29. The Meteorological Service Singapore said El Niño events, particularly strong ones, tend to delay the retreat of the dry season across much of the southern ASEAN region, with Singapore’s seasonal transition expected only in late October or early November.
The October 6 readings show that Singapore remains vulnerable to recurring haze as dry conditions continue across parts of Indonesia. For Singaporeans, monitoring PSI and PM2.5 levels remains important for planning outdoor activities. For Indonesians, especially in Sumatra and Kalimantan, the episode again highlights how prolonged fires and dry weather can create environmental impacts that extend across national borders.
Sources: Asia News Network (2026) , Straits Times (2026)
Keywords: Singapore Haze 2026, Singapore PSI, Indonesia Forest Fires, Transboundary Haze, Singapore Air Quality, PM2.5 Singapore
