FLY-TIPPERS have dumped tonnes of rubbish at a site in Widdrington Station.
About 20 car tyres, three fridge-freezers and several office chairs with green covers have been left at the Old Brickworks.
Council environment enforcement officers have called on the public to help catch the culprits.
They are seeking information about the origins of the waste and any vehicle that may have been seen carrying it.
The rubbish was dumped on or around Tuesday, August 21.
County Executive Member for Neighbourhood Services Alan Thompson said: “Fly-tipping is potentially hazardous for young children who could be attracted to irresponsible waste dumps.
“We encourage all residents and businesses to check the credentials of people offering waste disposal services and would urge anyone with information about this case to come forward.”
The cost of disposing of the waste is passed on to the taxpayer.
Northumberland County Council’s enforcement team has had increasing success in cracking down on the problem, including prosecutions.
Anyone with information about the latest incident should contact the authority in confidence on 0845 6006400.