What Time of Day Is PM2.5 the Lowest?

The data analysis we have done for Beijing, Guangzhou, Shanghai, Shenyang, and Chengdu in 2015 says it’s the afternoon–right around rush hour–that PM2.5 is the lowest. So if you’re planning a picnic or insist on exercising outside, you’re usually best off between noon and 6pm.

For data and more details, click here to read more: https://smartairfilters.com/en/blog/when-is-pm2-5-the-lowest/


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