Distribution of surface water in China 2016 by water quality

Distribution of surface water in China in 2016, by water quality

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Release date

June 2017

Region

China

Survey time period

2016

Supplementary notes

According to Surface Water Environment Quality Standards of China the water quality is categorized as follow:

Grad 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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