Northern Ireland Water has been fined £10,000 for polluting the River Cusher at Tandragee, causing a fish kill.
The pollution, which was discovered on May 24, 2012, came from Tandragee Wastewater Treatment plant.
The company admitted the offence at Armagh Magistrates’ Court on Friday when it was stated that dead fish were seen in a half-mile stretch of the Cusher River downstream of the plant.
An inspector for the Northern Ireland Environment Agency noted a discharge from one of the pipes.
He said there was a smell of chlorine. A sample was taken for laboratory analysis and it was found to be a pollutant.