Présentations Colloques

Session 5.04: Emerging contaminants in the water cycle and risk to Groundwater
Baierer (orateur)
Trans-boundary study of unregulated and emerging contaminants in Upper Rhine aquifer
Upper Rhine aquifer is a very productive aquifer. But it is highly vulnerable due to very low natural protective cover at its surface. This aquifer is under various pressures (agricultural, industrial, domestic). Consequently the water body is impacted by industrial pollutions and diffuse pollutions, reason why it was classified at risk to cause a failure of Water Framework Directive objectives. Several works were undertaken during the past 20 years to characterise these pollutions and their spatial and temporal evolution. **Thus, in 2016, trans-boundary inventory of water quality of Upper Rhine aquifer will be lead during the INTERREG V project ERMES under the supervision of the APRONA. The study will enable a trans-boundary research and analysis of targeted unregulated and emerging contaminants in Upper Rhine aquifer. This project aims to determine the occurrence of organic contaminants, including pesticides and metabolites, industrial compounds but also emerging contaminants (i.e. pharmaceuticals). This list of molecules was elaborated in a consensus way based on the up to date knowledge from experts of French, German and Swiss research organisms and public authorities in charge of water quality assessment of this aquifer. The selection of molecules of interest was based on availability of analytical methods, current knowledge on contaminants occurrence in groundwater and type of pressures. A list of 66 molecules has been established and will be analysed on the groundwater samples. Results will help stakeholders to better manage the groundwater resources of Upper Rhine aquifer. They would allow discriminating between patterns of pollution (diffuse or point source plume) and they would make it possible for water policies to choose the best plan of measure to undertake for achieving WFD objectives. **