[Monitoring of dioxins in cow's milk in areas of risk. Part XI.]
Monitoring van dioxinen in koemelk in risicogebieden. Deelrapport XI
Hijman WC , Kootstra PR , Jong APJM de , Liem AKD
RIVM Report 639102007
This report presents the results of the monitoring of dioxins in cow's milk from selected dairy farms. These dairy farms are located near the municipal waste incinerator (MWI) of Rotterdam (the Lickebaert area), the Netherlands. Levels are expressed in picograms 2,3,7,8-TCDD toxicity equivalents (TEQ) per gram of milk fat, calculated on the basis of international toxicity equivalence factors (I-TEF) of individual congeners. Now, the levels in cow's milk of the months January to March are known. In this report the dioxin levels in the Lickebaert area are presented for the months February 1990 to March 1993. The increase of the dioxin levels observed in the preceding period from July on, has apparently reached a maximum in September 1992 at a level of 8.9-13.3 pg TEQ/g of fat. The levels of the following months show a slight decrease. In the months October to December 1992 the dioxin levels in the milk samples ranged between 6.7 and 10.9 pg TEQ/g of fat. In the months January to March 1993 the levels ranged between 6.4 and 10.0 pg TEQ/g of fat and are comparable to the levels of the months October to December 1992. These levels still exceed the Dutch legislationlevel for dioxins in cow's milk.