The Environment Agency (EA) and local authorities are not doing enough to track down people illegally dumping waste, according to the Country Land and Business Association (CLA).
The latest Defra figures reveal that, although incidents of fly-tipping have hit a six-year high, the number of enforcement actions taken has decreased 4%.
But the CLA, which represents farmers and landowners, warned that the figures do not show the full extent of the problem because waste dumped on private land is not counted.
The association said regulators should ensure they are using powers to issue fixed penalty notices and seize vehicles, and that stronger penalties should be handed out.
CLA president Ross Murray said: “Local authorities tend not to get involved with clearing incidences of fly-tipped waste from private land, leaving the landowner to clean up and foot the bill.
“Our members have reported a big increase in fly-tipping on their land. Farmers and landowners are forced to clear up somebody else’s rubbish or they risk prosecution for illegal storage of waste. This is simply not right or fair.
“Only when people see evidence of local authorities taking stronger action to combat the scourge of fly-tipping can we hope to see a reversal in this worrying trend.”
The CLA also said councils should reduce fees for people legally disposing of their waste.
Many councils, including Hampshire, have introduced charges for DIY waste at their recycling centres in the past year and it remains to be seen whether this will have an effect on the fly-tipping figures.