A farmer from Cookstown has pleady guilty to causing pollution and fined a total of £525, plus £34 court costs and an offenders levy of £15.
Mr Daryl Black of Annaghquin Road, was fined for making a polluting discharge to a waterway.
On 8 January 2013, 23 January 2013 and 1 February 2013 Water Quality Inspectors acting on behalf of the Northern Ireland Environment Agency (NIEA) inspected the Claggan River at Lisnanane Bridge, and observed grey / white fungus attached to vegetation in the waterway.
The source of the polluting discharge was traced to a farm owned by Mr Black.
Samples taken at the time of the incidents confirmed that the discharge contained poisonous, noxious or polluting matter which was potentially harmful to fish life in the receiving waterway.