In the risk assessment framework, as used in the EUGRIS portal the receptor water includes:
Pathways that may lead to an exposure of the receptor water pose specific exposure pathways of human health and ecological risk assessment. Therefore the same definitions are valid as established in "Risk Assessment: Receptor Human Health" and "Risk Assessment: Ecological Receptor".
In the EUGRIS risk assessment framework two different functions are allocated to the receptor water:
(1) Surface water and groundwater are renewable natural resources,
(2) Surface and groundwater contribute to the drinking water supply for the population.
Thus, the characterization of the receptor water is based on principles used in both ecological and human health risk assessment. From ecological point of view (function 1) water serves as natural habitat of the aquatic ecosystems. Consequently, the characterization requires qualitative and quantitative criteria that allow describing the status of water with respect of its environmental relevance, such as:
Surface water and groundwater as resource for the drinking water supply (function 2) can be characterize by following criteria:
With respect to risk assessment it has to be noted that the characterization of the receptor water in its function as drinking water resource requires the consideration of two exposure routes:
Thus, the ecological characterization of surface water and groundwater needs to consider also anthropocentric issues, i.e. the integration of food web effects, such as biomagnification and bioaccumulation.
Data and information that enable the identification and characterization of the receptor water can be obtained from:
American Society for Testing and Materials (2002):
Guide for Risk-Based Corrective Action for Protection of Ecological Resources.
Commission of the European Communities (2003):
Communication from the Commission. Proposal for a
Directive of the European Parliament and of the Council Establishing Strategies
to Prevent and Control Pollution of Groundwater.
European Union (2000):
Directive 200/60/EC of the European
Parliament and of the Council Establishing a Framework for Community Action in
the Field of Water Policy. Official Journal of the European
Community. L 327.
Draft Water Quality Criteria Methodology Revisions: Human
Health. Federal Register, 63 (157): 43756-43828.
Ambient Water Quality Criteria
Derivation Methodology Human Health. Technical Support Document. Final Draft. Office of Science and