River water quality share in China 2021-2022, by level

Average river water quality in China in 2021 and 2022, by quality

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Release date

May 2023

Region

China

Survey time period

2021 and 2022

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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