Approximately 5.2 percent of all days for 339 cities in China failed to meet the national air quality standard in 2021 in terms of PM2.5 index. The air quality of China has been gradually improving after years of effort put into air pollution measures.
Share of total days of 339 cities* in China not reaching the national air quality standard from 2020 to 2021
*According to source, these are cities at or above prefecture level (APL cities) including municipality, cities or regions at prefecture level, autonomous prefectures and league.
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Ministry of Ecology and Environment (China). (May 27, 2022). Share of total days of 339 cities* in China not reaching the national air quality standard from 2020 to 2021 [Graph]. In Statista. Retrieved March 13, 2025, from https://www.statista.com/statistics/1042113/china-share-of-days-failing-to-meet-national-air-quality-standard/
Ministry of Ecology and Environment (China). "Share of total days of 339 cities* in China not reaching the national air quality standard from 2020 to 2021." Chart. May 27, 2022. Statista. Accessed March 13, 2025. https://www.statista.com/statistics/1042113/china-share-of-days-failing-to-meet-national-air-quality-standard/
Ministry of Ecology and Environment (China). (2022). Share of total days of 339 cities* in China not reaching the national air quality standard from 2020 to 2021. Statista. Statista Inc.. Accessed: March 13, 2025. https://www.statista.com/statistics/1042113/china-share-of-days-failing-to-meet-national-air-quality-standard/
Ministry of Ecology and Environment (China). "Share of Total Days of 339 Cities* in China Not Reaching The National Air Quality Standard from 2020 to 2021." Statista, Statista Inc., 27 May 2022, https://www.statista.com/statistics/1042113/china-share-of-days-failing-to-meet-national-air-quality-standard/
Ministry of Ecology and Environment (China), Share of total days of 339 cities* in China not reaching the national air quality standard from 2020 to 2021 Statista, https://www.statista.com/statistics/1042113/china-share-of-days-failing-to-meet-national-air-quality-standard/ (last visited March 13, 2025)
Share of total days of 339 cities* in China not reaching the national air quality standard from 2020 to 2021 [Graph], Ministry of Ecology and Environment (China), May 27, 2022. [Online]. Available: https://www.statista.com/statistics/1042113/china-share-of-days-failing-to-meet-national-air-quality-standard/
