Major lake water quality in China 2023, by level

Published by C. Textor, Jun 25, 2024
In 2023, among 230 selected key lakes across China, around 74.6 percent had been categorized with a water quality of Grade I to III, which serves mainly as drinking water and belongs to surface water source protection zone in China.

Key lake water quality on average in China in 2023, by quality

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Release date

June 2024

Region

China

Survey time period

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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