The Environment Protection Authority (EPA) says a fine and clean-up notice for a northern Victorian firm sends a clear warning to companies about illegal dumping of waste.
Earthmoving company North Sons was fined $6,000 for using a paddock at Leitchville to dump domestic and industrial waste.
The company was also ordered to clean up the site.
The EPA says unauthorised dumping is relatively common in country Victoria.
It says the practice leaves a legacy of offensive and hazardous materials, as well as making it difficult for companies to compete if they are doing the right thing.