The definitions for hazardous waste used within the Stora Enso Group are country-specific, and are listed by the regulatory agencies in each country or state. Hazardous wastes from Stora Enso units may comprise such materials as used oils, paints, solvents, laboratory waste and batteries.

In 2004, Stora Enso generated 11 609 tonnes of hazardous waste, an increase from
4 055 tonnes in 2003. This increase was largely due to contaminated soil from Uimaharju Sawmill that was delivered to a hazardous waste landfill.

Depending on their specific properties, hazardous wastes may either be burned for energy recovery, or handled by licensed companies who can safely recycle them, or dispose of them at licensed hazardous waste facilities or incinerators.

Improvements to Whiting Mill’s machine parts cleaning procedures are expected to reduce the amounts of hazardous waste generated by 2 tonnes or 70% per year.