How Many Smokes?

Live wildfire smoke over Ontario, and what breathing it costs you in cigarettes.

Smoke layer

What you'd actually breathe at street level.

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    Cigarettes under ½ 1–2 2–4 4–8 8+
    Smoke PM2.5 PM2.5 colour scale

    Berkeley Earth's Rule of Thumb: Breathing 22 µg/m³ of PM2.5 for 24 hours carries roughly the same mortality risk as one cigarette. Summed hour by hour.

    Wildfire smoke and tobacco smoke are not the exact same thing. This data does not include acute effects.

    Smoke & PM2.5: ECCC GeoMet (RDAQA analysis for past hours, RAQDPS forecast ahead, both 10 km) · Method: Berkeley Earth