China: share of Three Gorges Reservoir region water by quality 2021

As of February 2021, all of the Three Gorges Reservoir region water in China had been categorized as Grade II, which serves mainly as drinking water and belongs to surface water source primary protection zone in China.

Distribution of Three Gorges Reservoir region water in China as of February 2021, by water quality

Characteristic	Jul '19	Sep '20	Feb '21
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Release date

April 2021

More information

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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