Taihu, also known as Lake Tai or Lake Taihu, is a lake in the Yangtze Delta and one of the largest freshwater lakes in China. The lake lies in Jiangsu province and significant part of its southern shore forms its border with Zhejiang. With an area of 2,250 square kilometers and an average depth of 2 meters, it is the third-largest freshwater lake entirely in China, after Poyang and Dongting. The lake holds about 90 islands, ranging in size from a few square meters to several square kilometers.
Lake Tai is linked to the renowned Grand Canal and is the origin of a number of rivers, including Suzhou Creek. In recent years, Lake Tai has been plagued by pollution as the surrounding region experienced rapid industrial development.