Singapore’s haze has not cleared on Wednesday, 30 September 2026, with 24-hour PSI in the Unhealthy band in four of five regions on NEA readings at 7am, and 1-hour PM2.5 Elevated in four regions.
Latest PSI and PM2.5
At 7am, the 24-hour PSI was 97 in the north (Moderate), 112 in the south, 118 in the east and 119 in the west and central regions. Readings of 101 to 200 are in the Unhealthy band on NEA’s scale.
One-hour PM2.5 was in Band 1 Normal in the north (55 µg/m³), and in Band 2 Elevated in the south (59), the central region (63), the east (68) and the west (70). Twenty-four-hour PM2.5 ranged from 53 in the north to 73 in the west and central regions.
What the bands mean outdoors
Use the 1-hour PM2.5 reading for activities in the next few hours, and the 24-hour PSI forecast and health advisory for the next day’s plans.
At Good or Moderate 24-hour PSI (up to 100), everyone can carry on with normal activities. At Unhealthy 24-hour PSI (101 to 200), healthy people should reduce prolonged or strenuous outdoor physical exertion. The elderly, pregnant women and children should minimise it, and people with chronic lung or heart disease should avoid it.
If the 24-hour PSI reaches Very Unhealthy (201 to 300), healthy people should avoid prolonged or strenuous outdoor physical exertion, the elderly, pregnant women and children should minimise outdoor activity, and people with chronic lung or heart disease should avoid outdoor activity. Above 300, in the Hazardous range, healthy people should minimise outdoor activity and everyone else should avoid it.
For immediate outdoor activities, NEA’s 1-hour PM2.5 advice is:
- Band 1 (Normal, 0 to 55 µg/m³): Continue with normal activities.
- Band 2 (Elevated, 56 to 150 µg/m³): Reduce strenuous outdoor activity for the next hour. Vulnerable persons: Avoid strenuous outdoor activity for the next hour.
Vulnerable persons include the elderly, pregnant women, children, and persons with chronic lung disease or heart disease.
Masks and other precautions
N95 masks are not needed for short-term exposure, like commuting from home to school or work, and are also not needed indoors. Healthy people who need to be outdoors for several hours when the PSI is Hazardous (above 300) may reduce exposure by wearing an N95 mask with a good fit. The elderly, pregnant women and people with severe lung or heart problems should consult their doctor on whether to use one if they have to be outdoors for several hours.
MOH advises drinking plenty of water, and people with chronic heart or lung conditions should keep their medication on hand. Anyone feeling unwell, especially the elderly and children, should seek medical advice.
Haze outlook
Moderate transboundary smoke haze was still over Singapore on Tuesday evening (NEA update, 5.13pm, 29 September), with dry conditions across the southern ASEAN region and winds from the east and southeast.
Dry weather is expected over many parts of the southern ASEAN region in the coming days, with a continued risk of transboundary haze.
