In 2018, around nine percent of the groundwater 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 groundwater quality in China in 2018, by quality
According to Surface Water Environment Quality Standards of China, the water quality is categorized as follows:
Grade I: Source water and national nature reserve; Grade II: Drinking water and surface water source primary protection zone; Grade III: Drinking water and surface water source secondary protection zone; Grad IV: Industrial water use and recreational water use; Grade V: Agricultural water use and General landscape requirements.
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Ministry of Ecology and Environment (China). (May 29, 2019). Average groundwater quality in China in 2018, by quality [Graph]. In Statista. Retrieved April 01, 2020, from https://www.statista.com/statistics/1065049/china-share-of-groundwater-quality-across-the-country/
Ministry of Ecology and Environment (China). "Average groundwater quality in China in 2018, by quality." Chart. May 29, 2019. Statista. Accessed April 01, 2020. https://www.statista.com/statistics/1065049/china-share-of-groundwater-quality-across-the-country/
Ministry of Ecology and Environment (China). (2019). Average groundwater quality in China in 2018, by quality. Statista. Statista Inc.. Accessed: April 01, 2020. https://www.statista.com/statistics/1065049/china-share-of-groundwater-quality-across-the-country/
Ministry of Ecology and Environment (China). "Average Groundwater Quality in China in 2018, by Quality." Statista, Statista Inc., 29 May 2019, https://www.statista.com/statistics/1065049/china-share-of-groundwater-quality-across-the-country/
Ministry of Ecology and Environment (China), Average groundwater quality in China in 2018, by quality Statista, https://www.statista.com/statistics/1065049/china-share-of-groundwater-quality-across-the-country/ (last visited April 01, 2020)
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