In 2023, among 230 selected key lakes across China, around 74.6 percent had been categorized with a water quality of Grade I to III, which serves mainly as drinking water and belongs to surface water source protection zone in China.
Key lake water quality on average in China in 2023, 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.
Low quality surface water refers to surface water worse than Grade V.
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Ministry of Ecology and Environment (China). (June 5, 2024). Key lake water quality on average in China in 2023, by quality [Graph]. In Statista. Retrieved December 05, 2024, from https://www.statista.com/statistics/1065068/china-distribution-of-water-quality-of-key-lakes-across-the-country/
Ministry of Ecology and Environment (China). "Key lake water quality on average in China in 2023, by quality." Chart. June 5, 2024. Statista. Accessed December 05, 2024. https://www.statista.com/statistics/1065068/china-distribution-of-water-quality-of-key-lakes-across-the-country/
Ministry of Ecology and Environment (China). (2024). Key lake water quality on average in China in 2023, by quality. Statista. Statista Inc.. Accessed: December 05, 2024. https://www.statista.com/statistics/1065068/china-distribution-of-water-quality-of-key-lakes-across-the-country/
Ministry of Ecology and Environment (China). "Key Lake Water Quality on Average in China in 2023, by Quality." Statista, Statista Inc., 5 Jun 2024, https://www.statista.com/statistics/1065068/china-distribution-of-water-quality-of-key-lakes-across-the-country/
Ministry of Ecology and Environment (China), Key lake water quality on average in China in 2023, by quality Statista, https://www.statista.com/statistics/1065068/china-distribution-of-water-quality-of-key-lakes-across-the-country/ (last visited December 05, 2024)
Key lake water quality on average in China in 2023, by quality [Graph], Ministry of Ecology and Environment (China), June 5, 2024. [Online]. Available: https://www.statista.com/statistics/1065068/china-distribution-of-water-quality-of-key-lakes-across-the-country/