Type of waste water treatment in EU big cities (agglomerations of more than 150 000 p.e.) expressed as % of total generated load treated, situation on 31st December 2009/2010

The pie-chart summarizes the type of treatment applied in the wastewater treatment plants of 586 big cities/big dischargers (250,2 mil. p.e.) reported in 2011 by the Member States and Norway. In total 640 big cities and big dischargers was reported, however complete data on waste water pathways was available only for 586.