By joining the European Union, Slovenia has undertaken to implement the requirements of the Urban Waste Water Treatment Directive (91/271/EEC). The implementation deadline is short, but with the amended Operational programme for the discharge and treatment of waste water the deadline has been delayed, but it still represents realistic implementing deadline. The purpose of this thesis is to examine the current state of discharge and treatment of waste water in the municipality of Litija, the ongoing implementation of the requirements of the Operational programme and further tasks the municipality has to undertake. According to the specific number of agglomerations in the Operational programme, the municipality will have to provide a lot of resources to implement the requirements. The subject of interest are cost aspects of programme implementations in the municipality of Litija per inhabitant and the proportion of cost of living rise caused by the implementation of the Directive to users of this system. The main question is also how different variants of implementation affect the family budget and the possibility of lowering such costs with rational approach.