Hull City Council says fly-tipping incidents are falling but it is still costing over a quarter of a million pounds every year to clean up.
There were 5,795 reports of illegally dumped waste in the past year - nearly 2,000 fewer than two years ago.
The decrease is being attributed to several successful prosecutions and council workers visiting hot-spot areas.
Doug Sharp is Hull City Council’s assistant city manager for Streetscene services. He says: "These figures are encouraging – however, what it is important to remember is that where people see fly-tipping, it is because someone has committed an illegal act, not because the council hasn't cleaned it up.
"I can sympathise with anyone concerned about fly-tipping in our city. We take each instance very seriously and spend more than £250,000 every year cleaning up after people. Our focus is on trying to prosecute those that we can identify, but need information and support from residents to do this."