Health risk assessment of groundwater contaminated with methyl tertiary butyl ether (MTBE).
International conference on chemical process industries and environmental management. Cape Town, ZAF, 1997/09/08.
Methyl tertiary butyl ether (MTBE), a volatile oxygenate commonly used in fuels, is a frequent contaminant of some shallow groundwater.
Based on limited reporting, concentrations of MTBE in drinking water were generally less than 10 mug/L but excursions up to 770 mug/L have been reported.
Based on current MTBE toxicological data with emphasis on carcinogenic potential, and reproductive and developmental effects, a maximum drinking water level of 100 mug MTBE/L is suggested.
This recommended advisory level takes into consideration the equivocal evidence of the carcinogenicity of MTBE in humans and low potency in an oral exposure animal study.
Definitive conclusions regarding health risks to the general population from MTBE contamination of drinking water are not possible due to a paucity of monitoring data.
There is increased evidence of contamination of storm water and shallow groundwater from primarily, nonpoint sources.
Considering MTBE mobility and stability in water, movement to deep groundwater and drinking water supplies seems probable.
In light of projected increased MTBE use, there is a need for a more rigorous monitoring program to define the frequency of MTBE contamination of drinking water supplies and to develop risk management policies.
Mots-clés Pascal : Eau potable, Pollution eau, Eau souterraine, Composé organique, Analyse risque, Ether(t-butyl méthyl)
Mots-clés Pascal anglais : Drinking water, Water pollution, Ground water, Organic compounds, Risk analysis
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0422620
Code Inist : 001D16A02. Création : 22/03/2000.