The use of isotopes for improved management of nitrate pollution in aqueous resources

The objective of this report is to create awareness with environmental managers for the potential offered by the use of isotope data when tackling the environmental management of nitrate contamination in ground and surface water. The report shows how such data can lead to source apportionment or detection of natural attenuation of nitrate pollution in surface and groundwater, how it is complementary to existing water quality monitoring data and how it enables those involved in the implementation of environmental policy to develop more effective remedial measures and management strategies. The paper describes when and how to set up such studies, what can be expected as outcome and describes the benefits and limitations. The above topics will be demonstrated via a number of case studies conducted in Europe where isotope data lead to a better understanding of the origin, degree of natural attenuation or transport processes of nitrate pollution in surface or groundwater.