This meeting focused on completing a number of deliverables and to prepare for a workshop. One half day of the meeting was dedicated to information exchange with colleagues from U.S. National Institute of Standards and Technology (NIST), who ad been invited to join the TG meeting. In the course of the meeting, two state-of-the-art reports, produced by group members, were presented and discussed. They overview the monitoring techniques for biological hazards and the detection of biofilms. Along with three other reports, they will be basis for conclusions in the fields of early warning systems and analytical approaches to identify unknown hazards in drinking water. The conclusions will be presented and discussed with stakeholders in workshops later this year. Specifically, the frame for the workshop on early warning systems (26 June 2014) was set during the meeting. The group agreed to elaborate a questionnaire which addresses drinking water operators and asks for specific needs in terms of security. The survey will be distributed in May 2014 and results will be presented at the workshop in June.