Evaluation of Canadian drinking water guidelines using probability modeling of population exposure.
International Association on Water Quality. Biennial conference. Vancouver, BC, CAN, 1998/06/21.
An evaluation of potential population exposure to benzene in drinking water and in indoor air was conducted in an attempt to consider the adequacy of the allowable level set for benzene in Canadian drinking water (5 mug/l).
Exposure factors representative of the Canadian adult population, including tapwater and beverage-based tapwater consumption, body weights, time spent inside residences, and levels of benzene in residential air, were assessed using the method of Monte Carlo probability modeling.
Rates of benzene exposure from consumption of drinking water were estimated to be lower than from inhalation of indoor air by up to a factor of ten for almost half of the adult population when the drinking water concentration was represented by the allowable level.
With respect to human exposure, 5 mug/l of benzene in drinking water would not contribute significantly to exposure that is already estimated to occur from breathing air inside their homes for almost half of the adult population.
On that basis the drinking water level would appear more than adequate for public health protection.
However, Canadian agencies may need to pay greater attention to exposure to benzene in residential air, as no similar criteria or monitoring programs exist to protect the public.
Mots-clés Pascal : Eau potable, Canada, Amérique du Nord, Amérique, Benzène, Analyse risque, Pollution intérieur
Mots-clés Pascal anglais : Drinking water, Canada, North America, America, Benzene, Risk analysis, Indoor pollution
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0059510
Code Inist : 001D16A02. Création : 31/05/1999.