Tervakoski Oy is a Finnish paper industry company.

Its paper mill, founded in 1818,[2][3][4] is located in the village of Tervakoski in Janakkala, Tavastia Proper.

[1] In the years 1956–1984, the company gained a controversial reputation when a paper mill polluted Tervajoki River and Lake Kernaala with PCB compounds.

PCB concentrations are still so high that restrictions have been placed on the use of fish in the lake.

[6] This Finnish corporation or company article is a stub.