Press Release – Otago Regional Council The Otago Regional Councils (ORC) pollution team attended the site of a fish kill at Kaikorai stream on Saturday, and have taken water samples for testing. ORC will undertake an investigation of the fish deaths and seek to determine whether … The Otago Regional Council’s (ORC) pollution team attended the site of a fish kill at Kaikorai stream on Saturday, and have taken water samples for testing. ORC will undertake an investigation of the fish deaths and seek to determine whether there was any pollution from an upstream source. ORC General Manager Regulatory Richard Saunders said there were a number of factors that could influence fish deaths in a case like this.