%A Katharina F.F. Heidtmann %X The EU AAQ Directive was passed in 2008 but still NO2 concentrations are frequently exceeded in several German cities. There is a lack of studies on the compliance deficit with EU environmental policies and especially the AAQ Directive is an under-researched topic (Gollata and Newig, 2017). Here a hybrid approach of top-down and bottom-up is taken to address non-compliance in the EU multi-level governance. Matland’s (1995) ambiguity-conflict-matrix on policy implementation has been applied as a supportive tool to reveal potential causes for non-compliance in the case of the city of Osnabrück. A qualitative content analysis was conducted. The results show that Osnabrück’s situation being highly ambiguous in means and having low to high degrees of policy conflict on the local and national level. The findings reflect a hybrid of Matland’s experimental- and symbolic implementation type. Failed implementation of the AAQ Directive reflects domestic economy being prioritised over health and environment. %L theses_frw435 %T A"toothless" tiger? Or why do sub-national levels as the city of Osnabrück, Germany, still not comply with the EU Ambient Air and Cleaner Air for Europe Directive? %D 2017