According to Poisoning the Pearl, a report put out last year by Greenpeace, a fair share of factories may be flagrantly dumping their wastewater into the river. The organization found excessive amounts of heavy metals, organic pollutants and chemicals among the contents of pipes from five different factories, including a textile factory. The following clip that aired just yesterday on CNN sums up the issue in less than three minutes:
Further information and script from the video available here. And a download of Poisoning the Pearl is available here.