Singapore air quality reaches unhealthy levels due to haze

Air quality in Singapore has deteriorated, with four out of five regions experiencing unhealthy Pollutant Standards Index (PSI) levels. As of the afternoon of October 20, 2026, the southern, eastern, western, and central districts recorded unhealthy readings ranging from 103 to 136. The northern region remained in the moderate range with a reading of 89.

The haze is attributed to smoke drifting from Kalimantan and Sumatra. While recent showers and south-southeasterly winds briefly improved conditions on October 19, forecasts suggest that dry conditions and shifting winds from east-southeasterly directions could transport more smoke from Kalimantan fires toward Singapore between Wednesday night and Thursday.

Health advisories recommend monitoring 1-hour PM2.5 concentration readings for planning outdoor activities. PM2.5 levels have fluctuated, with some areas showing elevated concentrations while others remain within normal ranges.