C-FOOT-CTRL will be implemented in 9 WPs. Six WPs (WP2-WP7) are technical involving research and innovation, WP1 is the project management, WP8 is the development of the business plant and market perspectives and WP9 is the dissemination and training. WP2-5 involve the development and integration of the various components of the carbon footprint tool which include the design of its architecture (WP2), the development of the databases (WP2), the development of the dynamic model for GHG determination (WP3), the testing of commercial sensors and the development of novel ones (WP4) and the integration of all components (WP5). WP2-4s are interrelated and could run in partly in parallel. However, they should be successfully completed to allow their integration within one software tool and its subsequent validation (WP5). Subsequently, expensive testing of the software tool will take place for several (12 months) allowing the application of the developed software tool in 4 different real case studies (WP6). Finally, based on the findings/data from the application of the tool appropriate mitigation measures will be defined. The end result is a roadmap for minimizing GHG emissions within the normal operation of WWTPs without any other adverse consequences. A large number of secondments will be carried out through which the activities will be implemented.