Distribution of Yangtze River Basin water in China February 2021, by water quality

Distribution of Yangtze River Basin water in China as of February 2021, by water quality

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Source

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Release date

April 2021

Region

China

Survey time period

February 2021

Supplementary notes

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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