Napier Slip Way director Richard Watson has been fined $7500 after contaminants were discharged into the inner city's harbour last year.

Mr Watson was sentenced in the Environment Court in Napier on Monday after his company was served an abatement notice in April last year.

On June 18 2014 a boat belonging to the company dropped its slip cradle into the water spilling contaminants into the harbour, close to a popular public aquatic recreational area.

An analysis of the water by the council later found traces of copper, tin, zinc and diuron.

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