Distribution of surface water in China September 2023, by water quality

Published by Statista Research Department, Nov 20, 2023
As of September 2023, around 45 percent of the surface 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 surface water in China as of September 2023, by water quality

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Release date

November 2023

Region

China

Survey time period

September 2023

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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