Old Joke is true in Shanghai - Don't Drink the Water

3,300 Pig Carcasses in a river that supplies Shanghai's water!

And the state secrets is also being used to disguise the size of the environmental issue.

And per one estimate, pollution costs China 5.8% of GDP every year.

Floating, Dead Pigs Repulse Shanghai - WSJ
Health Threat on the Huangpu: Authorities Attempt to Clear a Crucial Water Source of Thousands of Carcasses

In China, What You Don’t Know Can Kill You - Via Media