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Table 2

Water quality classifications in China (GB3838-2002)

Water quality gradeApplicable water bodies
Sources of water bodies and national nature reserves 
II Class A water source protection areas for centralized drinking water supply, sanctuaries for rare species of fish, and spawning grounds for fish and shrimps 
III Class B water source protection areas for centralized drinking water supply, sanctuaries for common species of fish, and swimming zones 
IV Water bodies for general industrial water supply and recreational waters in which there is no direct human contact with the water 
Water bodies for agricultural water supply and for general landscape requirements 
V+ Essentially of no value 
Water quality gradeApplicable water bodies
Sources of water bodies and national nature reserves 
II Class A water source protection areas for centralized drinking water supply, sanctuaries for rare species of fish, and spawning grounds for fish and shrimps 
III Class B water source protection areas for centralized drinking water supply, sanctuaries for common species of fish, and swimming zones 
IV Water bodies for general industrial water supply and recreational waters in which there is no direct human contact with the water 
Water bodies for agricultural water supply and for general landscape requirements 
V+ Essentially of no value 
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