2013 Huangpu River dead pigs incident


In early March 2013 over 16,000 dead pigs were found in the Shanghai Songjiang section of the Huangpu River, which supplies the city of Shanghai, China with some of its drinking water. The pigs were dumped by farmers in neighbouring Jiaxing, Zhejiang province, a major pig farming area that is upstream of Shanghai.
The BBC reported that some pig corpses were infected by porcine circovirus, in line with comments from Lu Hongzhou, Secretary of the Shanghai Public Health Clinical Center's Party committee.

Overview

Before March 11

In early March news stories began to appear online in China regarding the incident. On March 9 it was reported that the pig carcasses had not influenced the water supply for human use. Official sources held that the quality of Shanghai's drinking water remained unchanged. On March 11 reports emerged that the pigs were infected with disease, but none communicable to humans.
Some environmentalists claimed that the corpses of pigs were a common sight in the Huangpu River. They said that this had been going on for ten years and that the peak periods were when spring changed to summer and when summer changed to fall.

March 12 to 14

As the story developed it became known that the carcasses came from upriver in Jiaxing, Zhejiang Province. Officials claimed that the pigs had frozen to death. Because of the enormous number of dead pigs, the carcasses were dumped into the river rather than being disposed of properly. Some livestock farmers were put under investigation. In other accounts, the farmers had thrown the bodies into the Huangpu River because burying the bodies was too expensive. As this story became known to the public the head of the Ministry of Civil Affairs stated that the incident was due to high costs of cremation. A few days after this he said that there was no need to burn the bodies as long as they were disposed of in a responsible manner, such as burial. After several days of media reporting, only a few stray corpses remained in the river in Shanghai and the stench faded.

Aftermath

During this time, there was an outbreak of H7N9 avian flu in the Yangtze river delta. Regarding a possible link between the two events, Jiang Qingwu, department chair of Fudan University's School of Public Health, said that H7N9 chiefly occurred in birds and had not historically been found in swine. On the same day, Lu Hongzhou, Secretary of the Shanghai Public Health Clinical Center's Party committee, stated that there were indications that the pigs carried porcine circovirus. Porcine circovirus, he said, was spread among pigs but could not spread to humans. "No matter the strain, avian flu has never had any connection to porcine circovirus." However, the pigs themselves could serve as hosts in which viruses could hybridize.

Public response

In defense

Ministry of Agriculture

The Ministry of Agriculture immediately sent investigative teams to Zhejiang and Shanghai on a mission to understand the facts of the matter, oversee its handling, and coordinate response work. Yu Kangzhen, National Chief Veterinarian, led the Ministry of Agriculture's supervisory team in Zhejiang to coordinate local science efforts.

Jiaxing, Zhejiang

The City of Jiaxing held a press release from 10:30 AM to 11:10 AM on March 15. At the conference Deputy Mayor Zhao Shumei described the situation:
Possible causes of the incident included:

In film

The Chinese-American film director Cathy Yan was inspired to make her first film, Dead Pigs, by a story about the incident.