Hydrochemical research of the Łososina river was conducted in 2013. Water for analyses was collected from the river in 6 measurement and control points near Tymbark town. Water electrolytic conductivity and phosphate, ammonium, nitrite and nitrate nitrogen concentrations were assessed in the collected samples. Along the whole length of the investigated section water of the Łososina river meets the requirements of water purity class I. Statistically significantly higher concentrations of nitrite nitrogen were registered in points 5 and 6 in comparison with the other analysed points. Analysis of hydrochemical profile of the investigated river section revealed a slight influence of Tymbark town on water quality.