Inadequate controls on industry and lax enforcement of existing standards have worsened the pollution problem.
In one case that came to a conclusion this week, toxic cadmium spilled into a river in southern China for months, threatening drinking water supplies for millions of people. As in similar cases, it was detected only after residents reported finding dead fish in there.
On Tuesday, courts in Guangxi region sentenced 13 people to prison over the spill into the Longjiang River. The 13 included three environmental inspectors who failed to perform their duties and allowed plants to dodge pollution inspections and discharge industrial effluents containing cadmium from April 2011, according to a report from the official Xinhua News Agency that was confirmed by two of the three courts Thursday.
Zeng Juefa, who was the vice director of Hechi city's environmental protection bureau, was given a four-and-a-half-year sentence for delinquency and taking bribes of 45,000 yuan ($7,300), the report said.