Threats to local drinking water in the municipality of Ljubljana

This article presents the key findings of an analysis of the local water supply in the Municipality of Ljubljana and all changes which affect on local area water quality. The detailed review covers several local water supplies located in the western part of Ljubljana. Inventory of existing land use in the recharge area of individual water supply and a survey of individual reservoir managers were performed in the field. An analysis of the data collected from a laboratory analysis of water samples from local water supplies was performed. Based on an analysis of the technical conditions of the reservoirs along with the proposed measures for improvement, the statistical processing of the results of the microbiological and physical-chemical analysis of the groundwater samples was carried out. Sampling was monitored from 2005 ? 2010. The Water Framework Directive approach DPSIR (Driving forces, Pressures, State, Responses), was also used in the study which allows more detailed analysis of local captures and definition of threats. Results of DPSIR approach are not presented in this paper. The purpose of the research work is to identify threats to existing local reservoirs in the Municipality of Ljubljana regarding the sanitary-technical conditions and the health aspects (water quality impacts on human health) and to define the hydro geological aspects (quantitative and qualitative status of the particular groundwater) and finally to outline measures to improve the situation. The research results show physical and chemical, microbiological and other environmental factors, which influence the quality of each individual reservoir. According to the research data the reservoirs Dolgo Brdo, Vnajnarje Korito and Besnica are the most problematic regarding drinking water quality.