Prevalence of pesticides in Krško-Brežice polje aquifer

Groundwater pollution with pesticides is a problem that occurs all over the world as well in Slovenia. Considering past high loads of groundwater pesticides, purpose presented research was to determine presence Krško-Brežiško polje period 2018-2019 and check applicability passive sampling method. A total 21 samples were taken at 11 locations 2 each Sava Krka rivers. We identified 15 their degradation products. Atrazine its product desethylatrazine most frequently determined samples. They are followed by desethylterbutylazine, terbutylazine, metolachlor simazine. Atrazine, desethylatrazine, chlortoluron, terbuthylazine detected surface water. 24 water using qualitative singled out 8 appear two campaigns. The frequency occurrence individual both methods comparable. Passive has proven be an appropriate method identifying pesticides. highest field arise from agricultural land areas. more contaminated central part direction flow west east. In Krško-Brežice field, atrazine still higher concentrations, despite 20 years long ban on use atrazine-based plant protection