Emissions of the ‘priority substances’ specified in the European Union (EU) Water Framework Directive (WFD) must be significantly reduced by 2020 in order to satisfy the environmental quality standards defined for EU watercourses. Furthermore, emissions of substances classified
as ‘priority hazardous substances’ must be progressively phased out until releases to the environment cease. The aim of the reported study was to compile knowledge about priority substance releases within the urban environment in order to facilitate the reduction/cessation of emissions
of said substances. Production facilities, households, agriculture, construction sites, buildings, roads, and waste disposal were identified as major urban pollution source categories. According to literature studies about 17% of the identified sources could be described quantitatively with
specific release factors. A further 19% could be linked to other types of quantitative data such as loads but not to specific release factors. Quantitative release data for the remaining 64% was not available.
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