Sewage Disposal and Sewer Systems aqua plus combines the know-how and areas of competence of its parent companies. In the area of sewage disposal, this is especially the City of Vienna. The City of Vienna is responsible for a discharge area of 410 km2 with two sewage treatment plants, one of which has a capacity of 4 million PE (population equivalent). The City of Vienna also operates a sewer system with a total length of 2,200 km. aqua plus is a competent partner for sewage disposal projects. Starting with the preparation of solution variants, we accompany or independently complete all areas of project implementation such as the planning, financing, construction and operation of sewage disposal projects. Holistic approaches – the preparation of solutions that lead from the sewage sources through the sewers and the treatment plant all the way to the receiving river – guarantee optimized solutions. We also offer innovative know-how in subterranean sewer systems and odor prevention.