What Are the World Health Organization (WHO) Annual and Daily Limits for PM2.5 Air Pollution?

The WHO annual limit is 25µg/m3.
The WHO daily limit is 10µg/m3.

Click here to see the WHO official website for the latest updated data and learn more pollution facts: https://www.who.int/news-room/fact-sheets/detail/ambient-(outdoor)-air-quality-and-health

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