The Janakkala wastewater treatment plant is located in Turenki, where wastewater from Janakkala Water’s customers generated in the areas of Turenki, Tervakoski, Leppäkoski, Kirkonkylä, and Harviala is treated.

Additionally, wastewater from water cooperatives located in Janakkala is sent to the treatment plant.

On average, the plant treats 1 500 000 m³, or 1,500,000,000 liters, of wastewater annually.