WHO global air quality guidelines (AQG) - Update 2021

Scientific Discourse
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The World Health Organization (WHO) published updated air quality guidelines (AQG) on 22 September 2021.

WHO global air quality guidelines: particulate matter (‎PM2.5 and PM10)‎, ozone, nitrogen dioxide, sulfur dioxide and carbon monoxide

Press release: New WHO Global Air Quality Guidelines aim to save millions of lives from air pollution

Full text download: https://apps.who.int/iris/handle/10665/345329

Side-by-side comparison of the 2005 air quality guidelines (AQG) and the 2021 AQG levels.

Table 3.26. Recommended 2021 AQG levels and 2005 air quality
Table 3.26. Recommended 2021 AQG levels and 2005 air quality1404×1242 106 KB

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Thanks for this document reference.

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Thanks for this document. It would be interesting to the see 24 hour average for every day of the year, and the annual average on the sensor community map to compare with these values.