Singapore haze persists as central PSI reaches season-high 184

Singapore’s central region recorded a 24-hour Pollutant Standards Index of 184 at noon on October 9, 2026, the highest reading of this haze season, CNA reported. Air quality remained unhealthy across the island, bringing conditions covered by existing government response plans for schools, workplaces and vulnerable residents.

CNA reported that the index rose steadily through the morning after conditions worsened overnight. Hourly concentrations of fine particulate matter, known as PM2.5, also remained elevated, with some regions moving into and out of the high band. Its report did not give individual regional PM2.5 concentrations.

What Singapore’s PSI reading means

The National Environment Agency classifies a 24-hour PSI of 101–200 as unhealthy, 201–300 as very unhealthy and anything above 300 as hazardous. The central region’s noon reading of 184 therefore remained within the unhealthy category. The figure and its season-high status were reported by CNA.

The one-hour PM2.5 measure uses a separate scale and a shorter reporting period. NEA describes concentrations of 56–150 micrograms per cubic metre as elevated and 151–250 as high. Those concentrations and the 24-hour PSI are distinct measures; their numbers should not be treated as interchangeable readings.

Regional smoke haze and obscured hotspots

The official regional update displayed at 10:38am on October 9 described moderate to dense transboundary smoke haze over parts of Singapore, Peninsular Malaysia, Kalimantan, and southern and central Sumatra. Dry weather had continued overnight across parts of the southern ASEAN region, although some areas received isolated showers.

Isolated to scattered hotspots were detected in Kalimantan and southern and central Sumatra. The update said many air-quality stations across Peninsular Malaysia, Singapore, Kalimantan and Sumatra were reporting unhealthy to hazardous levels. That regional range does not establish that Singapore itself had reached the hazardous category.

The observations also had limits. Thick smoke haze and cloud obscured parts of Kalimantan and Sumatra, preventing a full assessment of hotspots. Cloud cover restricted assessment of smoke haze elsewhere in the region. The detected hotspots therefore did not provide a complete picture of fire activity.

Over the following few days, the regional outlook expected showers in parts of Peninsular Malaysia, Sumatra, and northern and central Borneo. Conditions could improve where rain occurred, but hotspot and smoke haze activity was expected to stay elevated in fire-prone areas experiencing prolonged dry weather, with a continuing risk of severe transboundary haze.

Existing haze plans for schools and workplaces

Singapore’s current response arrangements predate Friday’s rise. In its September 4 announcement, NEA said the central region’s PSI had reached 101 at 7am that day, the first unhealthy reading caused by haze since October 8, 2023. Agencies in the government’s Haze Task Force had activated their response plans.

That statement identified elderly people, pregnant women, children and people with chronic heart or lung conditions as vulnerable groups. It said healthcare institutions and long-term care providers had put preparedness measures in place, including air purifiers and cooling equipment where appropriate, while public healthcare institutions were monitoring patients for possible haze effects.

Under the announced preschool arrangements, unhealthy air calls for limits on prolonged outdoor activities and strenuous indoor physical activity. Children with underlying chronic heart or lung conditions are exempted from outdoor activities and physical exercise. Preschools were also advised to monitor air quality and follow the corresponding advisories.

The September school arrangements provided for enclosed examination spaces with air purifiers during unhealthy or worse conditions. They also specified rescheduling national examinations if schools closed. These were contingency arrangements; they do not establish that schools closed or examinations changed on October 9.

For workplaces, the Ministry of Manpower’s September response urged shorter periods of strenuous work, protection for vulnerable workers, mechanical aids, job rotation and indoor breaks during unhealthy conditions. Community cooling spaces were placed on standby for PSI readings above 200. The central region’s noon reading remained below that threshold.

What remains uncertain about the haze outlook

The regional forecast does not establish when Singapore’s haze will clear or what its next PSI reading will be. The Haze Task Force’s September statement said further advisories would follow deterioration. Its existing plans describe the institutional response framework, rather than confirming which individual facilities or employers changed operations on Friday.