The Company collects and treats waste water in the City of Vilnius and the districts of ŠalĨininkai, ŠvenĨionys and Vilnius.The length of sewage networks amounts to 1125 km. Waste water is lifted by 73 waste water pumping stations, including 59 in the city of Vilnius. UAB Vilniaus Vandenys runs 12 waste water treatment plants. The biggest one is situated in Vilnius. In the centre of Vilnius, the OldTown and some areas of Antakalnis and Naujamiestis districts the sewage system is combined, including both waste water and rain water collection, while in the other districts the sewage system is separate. All waste water in Vilnius is led to the Vilnius Waste Treatment Plant, where it is treated mechanically and biologically.