Water Quality of the Rivers in the Prespa Region in 2014

The aim of this study was to determine water quality of the following tributaries of Lake Prespa: Golema, Istocka, Kranska and Brajcinska. For this purpose, the following physical and chemical parameters were monitored in 2014: concentration of dissolved oxygen, biochemical oxygen demand for five days, chemical oxygen demand through KMnO4 consumption, concentration of total nitrogen, and concentration of total phosphorus with bimonthly dynamics. Additionally, microbiological parameters such as heterotrophic bacteria and total number of coliform bacteria, including their seasonal dynamics, were studied. The highest organic and nutrient loading was registered in the Golema River. The results from microbiology indicated organic and faecal pollution of the water in the investigated rivers.