The Department of Environment, Food and Agriculture says it's investigated 169 reports of dumped controlled waste in the past five years.
A Freedom of Information request asked about fly-tipping and unlicensed waste sites since 2022.
The department said last year it had 41 such reports - more than twice as many as it had the previous year.
So far this year, 10 such incidents have been reported to it.
Yacht club worries over lifeboat retirement
One nuisance cyclist ticketed in more than three years
New ministerial post created by chief minister
Huge floating book fair to arrive in Douglas next month
Stay safe for Hop Tu Naa tonight
Special Olympics fundraiser needs you
Peel ready for bonfire and fireworks later
Government: "UK never told us about child murderer"