Abstract This study aims to extend the existing theoretical knowledge to the practical application of ozonation in advanced wastewater treatment. Urban wastewater from a WWTP in a European developed country (Austria) was treated by ozonation technology with different specific doses, varying from 0 g O3 to 1.0 g O3/g dissolved organic carbon (DOC), observing an abatement of micropollutants and bromate formation. Based on the ozonation, micropollutants were categorised into 3 groups, namely highly-reactive, medium-reactive, and non-reactive. For ozonation, micropollutants were removed at >80% for three groups at various ozone doses of 0.6 - 1.0 g O3/g DOC. The results showed that different bromate formations were observed in accordance with different ozone doses and varying between the investigated effluent samples. Bromate formation ranged between 0.65 ± 0.28 and 11.22 ± 9.85 μg/L. The value of ozone dose was regulated by WHO for drinking water (10 μg/L) was only exceeded at > 0.88 ± 0.05 g O3/g DOC, which is higher than normal applied doses for micropollutant removal (0.6 - 0.7 g O3/g DOC).