During the years 2011-2013 the project Dispersion in air (air, soil and water 2013) has pursued development of dispersion models and associated activities. The main objective has been to make available for civil authorities and The Swedish Armed Forces the best possible basis for decision support in case of a CBRN event with the primary aim of education, training and practice. A dispersion calculation requires a chain of models. Models for source estimation deliver data to one or several dispersion models which in their turn deliver data to models that estimate effect on humans or the environment. The models should have the capacity that corresponds to the scenario that is studied for e.g. training. Thus, a range of models with different level of complexity need to be handled as the questions inherent in the scenarios are different. Over the period, models for evaporation from ground of pools of mixtures of liquids and inverse models for estimation of possible source positions have been developed. A platform that permits dispersion models to be delivered as a product to training systems is under development. A study of the difficulties and the possibilities to model dispersion of B-substances in soil and groundwater has been delivered. These are only samples from the activities. During 2012 an EDA project was initiated together with FFI (Norway), DGA (France), ENERIS (France) and the University of Sussex (UK). The goal is to create a data base with validated data that is suitable for validating different types of dispersion models. The project MODITIC is to be finalised in 2015.