Is PM2.5 Worse on the Subway?

Yes! According to our tests, the particle counts varied a lot but, on average, platform air in the subway was worse than outdoor air. In the subway carriage, the air quality was worse than outside too.

Click here to read more of our original data: https://smartairfilters.com/en/blog/pm2-5-worse-subway/


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Smart Air is a social enterprise that creates simple, no-nonsense air purifier and provides free education to protect people’s health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.