NEW : Chinese authorities say a pig farmer admits to dumping pigs into Huangpu River . A porcine parasite is found in a blood sample . `` There were dead pigs all around and they really stunk , '' one local resident told CNN . ` Water users voice skepticism over assurances of water safety .
NEW : Chinese authorities say a pig farmer admits to dumping pigs into Huangpu River . A porcine parasite is found in a blood sample . Water users voice skepticism over assurances of water safety .