infrastructure providing a series of treatment processes aiming to reduce the level of pollution of wastewater received to an acceptable level before discharge into the receiving waters (en)
urban waste water treatment plant', ‘EU-funding of urban waste water treatment plants in the Danube river basin: further efforts needed in helping Member States to achieve EU waste water policy objectives’, European Court of Auditors, 2 15, http://www.eca.europa.eu/Lists/ECADocuments/SR15_02/SR_DANUBE_RIVER_EN pdf [23/03/2016] (en)