The content of the herbicides atrazine and hexazinone was measured in drainage water from seven to ten-year-old plantations grown with Abies nordmanniana (Steven) Spach on two clayey soils in Denmark. The concentrations of atrazine varied between 0.06 and 7.79 pg litre-'. The concentrations of hexazinone were different at the two locations, ranging from 0.07 to 2.09 pg litre-' at Bremersvold and from 3.47 to 42.66 pg litre-' at Koege. Metabolites of both herbicides were identified.