The aim of the subject is to extend and practise theoretical knowledge and practical design proficiency that is obtained earlier in subjects “Sewerage” and “Wastewater treatment”. In the frame of the comprehensive project is solved urban runoff drainage and safe treatment of all types of wastewater in the real catchment area. Students propose a project documentation of sewerage network and wastewater treatment plant. Drawing documentation includes technical report and detailed hydrotechnic and technologic calculations. Students use computers and current software.