EMIKAT as a flexible data management system for emission and energy balances and “what-if” scenario simulations and evaluations.EMIKAT allows users to define queries and evaluations according to their requirements. The following parameters can be evaluated: individual pollutants and pollutant groups, emission source categories and large facilities as single sources, end energy use in different consumption sectors, administrative units (districts, communities, provinces) and spatial distribution in user-defined grids (e.g. from 100x100m in cities to 500x500m in provinces), temporal patterns based on months and seasons, energy sources (e.g. fossil, renewable); fuel types (e.g. liquid, solid, gaseous); usage sectors (e.g. production, heating, traction), p resentation in tables and mapsas well as online data output with EXCEL for quick diagram generation by non-experts.