HealthThe Pulse / Environment & health
Haze &
Your Health
Check Singapore’s regional air quality and understand what the readings mean for outdoor activities.
Prepared 19 October 2026 · MOH source updated and checked 19 October 2026
Check regional air-quality readings
Choose an NEA region. These readings describe regional air quality, not the conditions on a particular street.
1-hour PM2.5
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24-hour PSI
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Source: NEA via data.gov.sg. Each measure shows its own observation and update time in Singapore time. Observed PSI is not a forecast. Check NEA’s forecast and advisory →
PM2.5 and PSI categories
PM2.5 and PSI use different scales. Read each value with its own category.
1-hour PM2.5 · µg/m³
- 0–55: Normal
- 56–150: Elevated
- 151–250: High
- 251 and above: Very High
24-hour PSI · index
- 0–50: Good
- 51–100: Moderate
- 101–200: Unhealthy
- 201–300: Very Unhealthy
- Above 300: Hazardous
Category source: MOH Haze advisory, checked 20 October 2026. Labels describe air quality; individual risk also depends on health, exertion and exposure duration. For immediate activities use 1-hour PM2.5; for next-day plans consult NEA’s PSI forecast, not the observed PSI displayed here.
Planning outdoor activities: now and tomorrow
For immediate plans, use 1-hour PM2.5. Healthy people should ease strenuous activity at 56–150 µg/m³, skip strenuous activity at 151–250, and keep all outdoor activity to a minimum above 250. Vulnerable people should skip strenuous activity at 56–150 and all outdoor activity above 150.
Use the PSI forecast for next-day plans; the observed PSI above is not that forecast. Individual tolerance varies. If you feel unwell, seek medical advice.
Read MOH’s full guidance, including advice by health group →
Before reusing an N95 or equivalent respirator
MOH permits reuse during haze if the mask remains clean, dry, undamaged and in shape. Never share it.
Replace a soiled, damp, damaged or misshapen mask.
Older adults, pregnant women and people with severe heart or lung problems should ask their doctor before using an N95 or equivalent respirator. Take a break if it causes discomfort.
Use this checklist before reuse. It does not certify fit or protection. MOH respirator guidance.
Sources & methodology
Health guidance: MOH Haze advisory (updated 19 October 2026; checked the same day). Environmental context: NEA Managing Haze (updated 17 October 2026; checked 19 October).
Data endpoints: 24-hour PSI and 1-hour PM2.5. Readings are fetched on request; no saved values or invented substitutes are used.
We reject invalid or missing regional values and observations over two hours old. This two-hour cutoff is a product freshness rule, not an official health threshold. If a feed fails, consult NEA directly.
Contains NEA data made available through data.gov.sg under the Singapore Open Data Licence. Readings may be unavailable if the feed cannot be reached.