Subject of this paper is the analysis of technological waste water within the business complex of BIMAL d.d.Brčko, which is generated as a result of technological processes within the oil refinery, press plant and extraction plant. This paper is aimed at establishingwhether the registered values of the tested parameters, based on physicochemical analyses of wastewater samples from different plants of the subject oil refinery, are within the permissible limits, i.e. whether they have a negative impact on the water quality of the Sava River as a natural water recipient and on the entire environment. The analysis comprised 11 parameters, and deviations from national standards for wastewater were identified for one parameter for the sulphate content, which indicates the need for further monitoring and taking adequate measures to prevent adverse environmental impacts.
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