STACKS of plastic containers caught fire at a water treatment works in Great Lumley.
About 200 containers stored at the site were well alight when fire crews arrived at around 6.40pm yesterday.
Firefighters from High Handenhold station were called to the scene after reports of a fire erupting outside the building.
They spent about 30 minutes trying to bring the incident under control.
The cause of the fire is still under investigation, with the extent of the damage still being assessed.