The air quality in eastern Singapore has reached unhealthy levels, with a PSI reading of 102 as at 9pm.
https://str.sg/zzhg
Full Details — Unhealthy Air Quality in Singapore (4 Sep 2026) 🌫️
⏰ Timeline & PSI Readings
24-hour PSI readings (source: NEA / data.gov.sg) :
Time Central East North South West Status
7:00 am 101 — — — — Unhealthy threshold breached
9:00 pm 120 102 86 85 97 East now also unhealthy
11:00 pm 123 104 88 87 99 Both Central & East unhealthy
12:30 am (5 Sep) 123 104 87 87 102 West also crossed into unhealthy
PSI bands:
- 0–50: Good
- 51–100: Moderate
- 101–200: Unhealthy ← current range
- 201–300: Very unhealthy
- 300: Hazardous
📌 Key Facts
- First time PSI hit unhealthy levels since October 2023 — nearly 3 years
- Cause: Forest & land fires in Sumatra and Kalimantan, Indonesia, driven by dry conditions linked to a super El Niño. Smoke plumes are drifting towards Singapore on prevailing southeasterly/southerly winds
- Forecast: Haze expected to persist into Sept 5, with air quality ranging from higher end of Moderate to middle of Unhealthy (PSI ~85–150)
- Meteorological Service Singapore warned on Sep 1 that hazy conditions could continue for up to two weeks into mid-September, with sporadic showers possible in the second week
⚠️ Health Advisories
- General public: Reduce prolonged or strenuous outdoor activities; stay indoors as much as possible
- Vulnerable groups (elderly, children, pregnant, people with heart/lung conditions): Minimise outdoor exposure; keep windows closed; use air purifiers if available
- NEA will issue daily haze advisories including 24-hour PSI forecasts to help plan activities
🚨 Contingency Measures
Activated by the Haze Task Force :
- If PSI exceeds 200 ("Very Unhealthy"): air-conditioned rooms at all community centres and selected Residents' Committee centres will be opened to the public as respite areas
- Government agencies have activated respective haze response plans
- Daily PSI forecasts and 1-hour PM2.5 readings updated via NEA website and official channels
Source: The Straits Times / NEA / MSS — Published 4 Sep 2026, updated to 11pm
Link: https://str.sg/zzhg