ABSTRACT: The need for drinking, use, energy and water for many purposes is increasing day by day as a source oflife for all living things. Unplanned use of water resources is one of the most important problems today. Due tooveruse, water resources are adversely affected and polluted by environmental factors. The management of waterresources in this framework is important not only in terms of water quantity but also in terms of its quality. Inthis study, hydrochemical properties of water samples taken from 17 different points in Trabzon city Söğütlü Riverand its branches were determined and the basin was classified in terms of different water quality parameters byusing spatial analysis techniques. Dissolved oxygen (DO) values at Söğütlü Stream ranged from 2.76 to 11.24 mg/l;Hardness values (FS) vary between 50.75-218.48 mg/l. pH value in surface water is between 6.63 and 7.5; theelectrical conductivity (EC) value is between 61-258 μS/cm and the total dissolved solids (TDS) is between 58-223 mg/l. Surface water of Söğütlü Stream classified as Fe, Mn and Al is in II., III. and IV category according to“Classifications of Inland Surface Water Resources”. In terms of NO2 and NO3 pollution parameters, also water class is in II., III. and IV. category. Physical, chemical and pollution analyses made on the surface water of SöğütlüRiver show that surface water has been polluted in recent years due to unfavorable environmental conditions.