In the period 2010-2015 the monitoring of the incidence of Cd and its compounds in the waters of the Trotuş River and its main tributaries (Uz, Urmeniş, Tazlăul Sărat, Tazlău, Slănic, Plopu, Oituz, Izvorul Alb, Ciobănuş, Caşin, Asău) was carried out. There have been some exceedances of acceptable Cd concentrations during the 2010-2011 monitoring period, on the Uz River and the Izvorul Alb - upstream section of Lake Poiana Uzului. In the following years, 2012-2015, in all monitoring sections, Cd and its compounds concentrations were within or below the detection limit of the analyzer.