Major lake water quality in China 2023, by level

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.至2023年，在中国选取的230个关键湖泊中，约74.6%的湖泊被划分为I至III级水质，此类水质主要用作饮用水，并隶属于中国地表水水源保护区。