PM2.5
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Check before you breathe — live PM2.5 for Singapore.
0–50 good · 51–100 moderate · 101–150 unhealthy for sensitive groups · 151–200 unhealthy (mask up) · 200+ stay inside. Haze season hits when regional fires flare (usually Aug–Oct) — PSI is the number everyone quotes.
The free morning brief is launching soon — be first on the list.