How is air quality in Singapore in 2026?

The 24-hour Pollutant Standards Index (PSI) summarises six pollutants, including PM2.5 and PM10. NEA bands run Good (0-50), Moderate (51-100), Unhealthy (101-200), Very Unhealthy (201-300) and Hazardous (above 300). A reading of 101 or higher is treated as unhealthy. For hour-to-hour decisions, NEA also publishes 1-hour PM2.5 bands: Normal (0-55 µg/m³), Elevated (56-150), High (151-250) and Very High (251 or more).

MOH health advisories scale outdoor exertion by PSI band and by group. Healthy adults may only need to reduce prolonged hard outdoor work in the Unhealthy band, while children, pregnant people, older adults and people with heart or lung disease should cut back earlier and more sharply. Follow the live table on haze.gov.sg or myENV rather than last year's Facebook memory of a bad haze week.

MSS notes that slight to moderate haze is more common in the Southwest Monsoon and in light-wind inter-monsoon spells, while severe transboundary smoke can drop visibility below one kilometre in rare episodes. Drier regional conditions and hotspots over parts of Sumatra or Kalimantan matter more than a single Singapore street tree. Rain can clear local feel quickly, but it does not erase the next dry-wind forecast: Rain.

Outdoor recreation weeks should keep a gym or covered Park Connector backup when PSI climbs: Outdoor recreation. Heat stress still stacks with haze on sunny afternoons: Heat and humidity. Indoor humidity and filtration choices matter for sealed flats: Humidity. District choice still hinges on commute more than haze maps: Where to live. Clinic access for respiratory flare-ups sits in Healthcare costs. Flash floods are a separate rain risk: Flood risk.