The problems of urbanization are shown throughout replacing natural space with the built-up areas. Such changes and regulations in the aquatic environment constitute negative impacts and increase pressure on the environment and characteristics of drainage. Significant changes are reflected in the drainage properties from catchment areas and are shown as the new regime of the watercourse. The consequences are even greater with leaching pollutants into a watercourse and more frequent and intense floods. One such urban watercourse is a stream Glinščica, which was previously subject to intense regulation and remediation of the channel. At this stream were previously made measurements within the state monitoring, as well as individual measurements for study purposes. In the last ten years since extensive research were made, individual areas were exposed to intense anthropogenic impact with newly build areas around its watercourse, wich only intensify the pollutions. Becasue of that the green space is being further reduced. Main problems in this area continues to represent the drainage of water and retention in the surrounding green areas. In my thesis in addition to a general description of the aquatic environment I calculated the stress load pollution of drainage from catchment areas and assess the present state of the environment.