In Wuxi, a city 84 miles west of Shanghai, nearly 2 million residents had foul smelling green water coming out of their taps for a week in May 2007. Wuxi sits on the shores of Lake Tai, China’s third largest freshwater lake. And on that week in May, it experienced a perfect cocktail of industrial effluents, agricultural runoff, and sewage, which created a toxic cyanobacterial bloom, leaving 70 percent of the city’s water undrinkable. The Lake Tai incident was not an anomaly. Poor oversight and enforcement of water pollution regulations and standards has long left between 30 and 50 percent of China’s surface and groundwater undrinkable.