The main goal of the Lenvis project is to develop an innovative collaborative decision support network for exchange of location-based environmental and health services between stakeholders. Lenvis includes health indicators as integral part of the environmental management. Lenvis furthermore aims at supporting governments in communication with the general public and in particular to address the young generation Y, by entering popular digital social networks. This is done by development of a generic ICT solution on the basis of service-oriented-architecture (SOA), providing data, information and modelling services. The approach will be validated through test cases on fresh surface water and outdoor air quality in the Netherlands, Portugal and Italy.