Traduction en anglais : Principles in setting threshold values and special aspects in defining threshold values in drinking water.
Threshold limit values are legal limits for substances found in the environment, e. g. in drinking water.
Values based on toxicological data have been derived to safeguard health on the basis of lifelong consumption.
As the process of chemical carcinogenesis and mutagenesis has widely been regarded as a nonthreshold phenomenon, the « unit risk » estimate was established representing a daily lifetime dosage that would yield an extra theoretical risk at an accectable level for public health.
In addition to threshold limit values based on toxicological data, other principles are applied : threshold limit values defined by precautional aspects - for preventing adverse affects of a general nature - shall ensure that the environment is virtually kept free of such compounds.
Threshold limit values for aesthetic parameters are provided to prevent distasteful changes, such as in taste or odour.
In the German Order on Drinking Water the above principles for establishing threshold limit values are applied, whereby precautional aspects were emphasized.
Mots-clés Pascal : Eau potable, Allemagne, Europe, Toxicité, Composé chimique, Teneur, Limite tolérable, Législation
Mots-clés Pascal anglais : Drinking water, Germany, Europe, Toxicity, Chemical compound, Content, Bearable limit, Legislation
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0458526
Code Inist : 001D16A02. Création : 03/02/1998.