The Yangtze River Delta area including Shanghai and Suzhou, has a population of more than 55 million and a GDP output of more than $2 trillion. Clean-water shortage poses an immediate threat to the regional economic development and human health. Regional river networks through Lake Taihu are severely polluted by excessive waste discharge and eutrophication. Sources of pollution include industrial and household sewage, fertilizer runoff to the river. The pollutant discharge rate to the waterways is far beyond its self-purification capacity, resulting in continuous water quality determination, generating high amount of total ammonia, total phosphorus, petroleum pollutants and dissolved oxygen in the rivers, which is so-called eutrophication of water bodies.