In many developing countries, access to basic infrastructure services, such as sewerage and waste disposal varies considerably across different areas. In this study, Fuzzyset Qualitative Comparative Analysis identifies configurations of economic and political conditions (population density, population size, income and political participation), associated with good and poor access to sewerage and waste disposal in Turkish provinces. The findings suggest there is a core configuration of conditions associated with good access to both types of infrastructure servicehigh income and high political participation. A single core configuration is associated with poor access to both types of servicelow population density, small population size and low political participation. Other configurations are observed relating specifically to good and poor access to sewerage and to waste disposal services, respectively. We theorise the different pathways that we identify, emphasizing that economic measures to support development may offer the best prospect of improving infrastructure access.