The main problem is that Švenčionys urban wastewater treatment plants are naturally depreciated and the efficiency and quality of the wastewater management services provided do not meet the requirements of the Action Plan for the implementation of the Water Sector Development Programme 2017-2023 and other environmental requirements set out in the legislation. To solve the problem, a Project is initiated, the aim of which is to increase the efficiency of waste water treatment for the residents of Švenčionys city, ensuring that the annual average concentrations of the discharges do not exceed the requirements set out in the Nemunas River Basin District Management Plan and selection for the environmental impact assessment of Švenčionys wastewater treatment plant and activities in Cirkliškis district, Švenčionys district. Reconstructed Švenčionys urban wastewater treatment plants will protect the environment from the harmful effects of discharged waste water, improve the ecological status of water bodies, contribute to the socio-economic development of Švenčionys district, improve the quality of life of residents, health and environmental protection.