75% of China's rivers and lakes are polluted

China has 20% of the world’s population but only 7% of global water resources. To make matters worse, 90% of cities’ groundwater and 75% of rivers and lakes are polluted according to the World Bank. This means that 700 million people drink contaminated water every day.

source: 15 Facts About China That Will Blow Your Mind

http://www.businessinsider.com/15-facts-about-china-that-will-blow-your-mind-2010-2#the-majority-of-chinese-drink-polluted-water-15