The International Global Atmospheric Chemistry project comments on the revised WHO air quality guidelines
| Published | 26 October 2023 |
|---|---|
| Journal | Environmental Research Letters |
| Volume | 18 |
| Issue | 11 |
| Pages | 111001 |
| Publisher | IOP Publishing |
| DOI | 10.1088/1748-9326/ad039f |
Open access (gold)
Urban and indoor air quality in Dhaka
Abstract
In September 2021, the World Health Organization (WHO) announced updated global air quality guidelines providing health-based targets for six key air pollutants [1]. The annual targets for pollutant concentrations were reduced fourfold for nitrogen dioxide (NO2) to 10 µg m−3 and by 50% and 25% respectively for the mass concentration of particles smaller than and equal to 2.5 µm (PM2.5) and 10 µm (PM10) to 5 µg m−3 and 15 µg m−3. New targets were introduced for peak season ozone (O3) at 60 µg m−3 and daily carbon monoxide (CO) at 4 mg m−3. In contrast, the target for sulfur dioxide (SO2) was relaxed by a factor-of-two [1] to 40 µg m−3. The new guidelines also have updated interim targets.
Abstract © the authors, published under a CC BY licence.
Cite this
Clare Paton-Walsh, R Subramanian, James H Crawford, Laura Dawidowski, H Langley DeWitt, Lisa Emberson, Louisa Emmons, Rebecca M Garland, Yugo Kanaya, Aderiana Mbandi, Kerri A Pratt, Nestor Y Rojas, Abdus Salam, Kateřina Šindelářová, Vinayak Sinha, N’Datchoh Evelyne Touré, Liya E Yu, Mei Zheng (2023). The International Global Atmospheric Chemistry project comments on the revised WHO air quality guidelines. Environmental Research Letters, 18(11), 111001. https://doi.org/10.1088/1748-9326/ad039f
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