On October 21, Singapore’s air quality presents a mixed picture with elevated particulate matter levels in western, central, and southern regions, signaling continued haze concerns tied to ongoing hotspots in nearby Indonesian areas.
- PM2.5 levels elevated in west, central, and south at 5pm.
- Hotspots in Kalimantan and Sumatra contribute to haze.
- Precautions recommended for sensitive groups during elevated readings.
What happened
Singapore experienced fluctuations in air quality throughout the day on October 21, with particulate matter (PM2.5) levels rising above normal in several regions. By late afternoon, the west, central, and southern parts of the island recorded elevated PM2.5 readings, while the north and east remained largely within healthy ranges. The 24-hour Pollutant Standards Index (PSI) showed unhealthy air quality in the west and central areas.
The haze situation stems from transboundary smoke caused by numerous hotspots detected in Kalimantan and southern Sumatra. Moisture from local showers has brought some relief in certain areas, but dry conditions in fire-prone regions continue to sustain the smoke haze, keeping air pollution at elevated levels.
Why it feels good
Despite the challenges, the situation is showing signs of minor improvement with intermittent dips in pollutant levels, such as the temporary return to normal PM2.5 readings earlier in the day in some regions. This suggests that localized weather changes and patchy showers can help alleviate haze episodes in the short term.
Moreover, public awareness and government advisories are helping at-risk groups take proactive steps to protect their health. The availability of effective protective masks such as N95s and alternatives like KN95, FFP2, and KF94 encourages safe outdoor activity when necessary, strengthening community resilience during haze periods.
What to enjoy or watch next
Residents can monitor air quality closely using hourly PM2.5 measurements to make informed decisions about outdoor activities. Authorities will continue tracking transboundary smoke trends and local weather patterns to anticipate any further changes to air quality levels.
In the meantime, the public is encouraged to stay updated on mask availability through resources like the HazeMaskGoWhere website and to follow health precautions especially for vulnerable populations such as the elderly, children, and those with heart or lung conditions. Watching for updates on regional fire management efforts may also provide insight into when air quality may improve further.