2024-01-29 07:09:44
It may happen that ANSES is not able to provide VMAX. In this case, the table presented above indicates “ Absence of VMAX ».
The impossibility for ANSES to establish a VMAX results from the absence of sufficient data to define a health safety limit specific to the substance. This does not necessarily mean that the substance has high toxicity. If additional data is developed or made available, ANSES may be required to carry out a new assessment.
Why are we seeing more situations of overrun than in the past?
Over the last decade, health control of the quality of EDCH has evolved in terms of performance of analysis methods. Furthermore, more and more active substances and metabolites are being sought. Finally, the uses of plant protection products also evolve over time. This development is due on the one hand to plant protection practices and needs, and on the other hand to the evolution of the number and diversity of authorized substances. This may in fact lead, for certain uses, to a restriction of product choices or to an increase in the volumes of use of certain active substances.
Through the combination of these different factors, controls reveal more situations where regulatory quality limits are exceeded than in the past, requiring management measures to restore the quality of the water distributed.
What is a metabolite relevant to EDCH and who evaluates it?
According to European Directive 2020/2184, “ a pesticide metabolite is considered relevant for EDCH if it has grounds to consider that it has intrinsic properties comparable to those of the parent substance with regard to its target pesticidal activity or that it poses (by itself) itself or through its transformation products) a health risk for consumers ».
When a metabolite is considered relevant for EDCH, it must be subject to the same vigilance and the same regulatory measures as an active substance found in tap water.
The criteria and evaluation methods for establishing the relevance of pesticide metabolites in EDCH are not defined at European level, it is up to each country to define them. In France, it is ANSES which assesses the relevance or not of a metabolite for EDCH.
At the request of the DGS, ANSES proposed in January 2019 a method to identify, among pesticide metabolites, those deemed relevant and requiring priority attention with regard to health issues for consumers.
The methodology used by ANSES only applies to drinking water : it focuses on the protection of human health with regard to the risks associated with the ingestion of metabolites in tap water.
As a precaution, in application of this method, ANSES classifies a metabolite as relevant in tap water in two scenarios :
when this relevance can be established with regard to the scientific knowledge available when essential scientific data is missing with regard to the criteria adopted by ANSES
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