Asbestos one of the most dumped items in Northern Ireland
Tyres, asbestos and construction rubble are among the top items of commercial waste being tipped across Northern Ireland.
Items from house clearances - such as white goods and furniture - are also among the most frequently dumped items, according to figures released by the NI Environment Agency.
In 2017 there were 155 incidents of tyres being dumped illegally reported - 30% were left at the side of a road, 23% dumped on farmland, 14% at bonfires and 12% on commercial premises.
Mark Cherry from NIEA's enforcement branch said: "We are keen to remind all businesses, no matter how big or small, of their legal duty to dispose of their waste properly.
"It's their rubbish and their responsibility. Even if a business pays for someone to dispose of their waste they must ensure that it is stored, treated, transported and dealt with safely and properly.
"Some commercial operators want to avoid disposal costs and so dump the material. Our advice is to always use a licensed waste carrier or use an authorised waste management facility."
Throughout the year NIEA visits tyre retailers to remind them that end-of-life tyres must be disposed of properly.
Mr Cherry said: "We assess all reports and investigate any reasonable lines of enquiry with a view to enforcement action and possible prosecution, especially when there is a significant volume or waste or a pattern of repeat offending."
Prosecutions can lead to a maximum fine of £50,000 or imprisonment.