Air quality in Singapore deteriorated overnight, with the 24-hour Pollutant Standards Index (PSI) reaching the unhealthy range across all five regions early on Saturday.
The 24-hour Pollutant Standards Index (PSI) reached the unhealthy range across all five regions of Singapore early on Saturday, with readings ranging from 112 to 139 at 6am. Hourly PM2.5 concentrations were also elevated, with levels from 72 in the east to 115 in the west. The highest PSI reading was recorded in the western region, indicating the most severe air quality conditions in that area.
The National Environment Agency (NEA) reported that smoke haze from Sumatra had been observed drifting towards Singapore, with similar conditions detected over Kalimantan. Dry conditions in Singapore contributed to the worsening air quality. Showers are forecast for Saturday, but smoke haze may continue to be transported from Sumatra under prevailing south-southeasterly or south-southwesterly winds. Conditions could improve from Sunday, when winds are expected to shift to blow from the southwest or west, potentially reducing the amount of smoke haze transported towards Singapore.
Why it matters
Showers are forecast over Singapore and surrounding region on Saturday; the broader context is that The National Environment Agency reported that hourly PM2.5 readings were elevated in the western, central, southern, and eastern regions.
This section reflects Dumpling editorial interpretation and is provided for context only.
What to watch
Watch whether NEA issues updated air quality advisories as haze transport continues from Sumatra.
This section reflects Dumpling editorial interpretation and is provided for context only.