Contaminated sites are among one of the major environmental problems in Denmark, contaminating soil, groundwater and surface water bodies located nearby. Recently, screening tools and risk assessment methods have been developed to support the Danish Regions in evaluating the impact contaminated groundwater originating from these sites may have on Danish streams (Miljøprojekt nr. 1846, Miljøprojekt nr. 1604 ). However, investigations related to stream water affected by contaminated sites have to-date only covered single sources of contaminants.
This report provides a decision support tool for assessing the importance of contaminated sites in relation to other potential sources impacting the streams, with the aim of identifying the impact drivers in a multiple stressor context.