This paper provides the results of the privacy impact assessment conducted for the PROACTIVE solutions and its subsequent privacy by design integration process. PROACTIVE is a solution for fostering coordination and communication between stakeholders before and during CBRNe events focusing on providing guidance to vulnerable populations. Based on extensive fieldwork activities with practitioners and vulnerable groups, the results of the analysis reveal the main risk focus, including the need to filter data by competent authorities (data controllers) and potential solutions for each of them, which allow establishing standard procedures for systems used in similar contexts.