Rogue traders operating in Belmont dumped more than 20 tonnes of waste, costing the taxpayer thousands of pounds.
Harrow Council were forced to pick up the £6,000 bill for the bogus waste collectors dumping household and construction waste illegally.
According to figures from the Department for Environment, Food and Rural Affairs, fly-tipping cost England authorities £12.2million in 2017/18.
The council is urging residents to check if a waste collector is bogus or genuine. They advise to ask to see a waste collectors license and ID before or ask the council to collect and safely dispose of your waste.
Councillor Varsha Parmar, cabinet member for environment, said: “What a disgusting eyesore. It makes me so angry that taxpayers have once again had to clear up after these criminals – it’s unacceptable.
“I can’t stress this enough, if you’re paying for waste removal or building works make sure they have a waste carrier licence and ID or you could land yourself in trouble with the law if they dump it illegally.”