In 2020, around 52 percent of the river water samples across China had been categorized as Grade II, which serves mainly as drinking water and belongs to surface water source primary protection zone in China.
Average river water quality in China in 2019 and 2020, by quality
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Ministry of Ecology and Environment (China). (May 26, 2021). Average river water quality in China in 2019 and 2020, by quality [Graph]. In Statista. Retrieved May 26, 2022, from https://www.statista.com/statistics/1065058/china-share-of-river-water-quality-across-the-country/
Ministry of Ecology and Environment (China). "Average river water quality in China in 2019 and 2020, by quality." Chart. May 26, 2021. Statista. Accessed May 26, 2022. https://www.statista.com/statistics/1065058/china-share-of-river-water-quality-across-the-country/
Ministry of Ecology and Environment (China). (2021). Average river water quality in China in 2019 and 2020, by quality. Statista. Statista Inc.. Accessed: May 26, 2022. https://www.statista.com/statistics/1065058/china-share-of-river-water-quality-across-the-country/
Ministry of Ecology and Environment (China). "Average River Water Quality in China in 2019 and 2020, by Quality." Statista, Statista Inc., 26 May 2021, https://www.statista.com/statistics/1065058/china-share-of-river-water-quality-across-the-country/
Ministry of Ecology and Environment (China), Average river water quality in China in 2019 and 2020, by quality Statista, https://www.statista.com/statistics/1065058/china-share-of-river-water-quality-across-the-country/ (last visited May 26, 2022)