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- Water Quality Classification：
- Water Function Zone：
- Water Function Zone：
- Water Function Zone：
- Water Function Zone：
- Data Frequency：
Annual National Environmental Data and Statistics
Data Source: Ministry of Environmental Protection, Water Quality Columns on Provincial and Municipal Environmental Protection Bureau and Water Resources Bureau Websites
- Class I
- Class II
- Class III
- Class IV
- Class V
- Below Class V
- Black and Smelly Waters