This project was closely related to the Vartius water management project where water supply and sewage investments were completed. A new development plan was created for Vartius, where arranging appropriate water management was included as one of the procedures. Th e goal of this project was to ensure the suffi cient handling of waste water from Vartius by constructing a new water treatment facility that uses the bio rotor principle in order to prevent the contamination of the waterways and environment as the usage of Vartius increases. Th e development plan goals and growth scenarios were included in the water management facility planning and design. Th e treatment facility was planned to be placed in the location assigned for it in the local land-use plan.