Occurrence of residues of veterinary drugs in Breton waters

Submitted by Isabelle Dubigeon on Thu, 06/18/2020 - 14:39
Frequent contamination of the Breton aquatic environment by Veterinary Medical Residues
Rapport expo-Veto 2020

Frequent contamination of the Breton aquatic environment by Veterinary Medical Residues : This is shown by a study, carried out over 3 years, as part of the research project "Expo-Veto" labeled by the Regional Plan Health Environment of Brittany. Concentrations are significantly lower in treated water. Nevertheless, further research is needed to quantify the associated health risks. Published on the PRSE website on January 16, 2020

[Source : Rennes 1 University]

 

Scope of the study

40 molecules of veterinary residues (RMV) were searched for in and out of 23 water treatment plants. Of the 25 catchments selected, distributed over the 4 departments of Brittany and dedicated to the production of drinking water, 23 draw surface water, 2 groundwater.
 
The selection of the sites was based on two criteria: the breeding pressure at the canton level and the daily pumping rate on the resource for the production of drinking water.

Several methods have been applied to identify the origin of the contamination (animal versus human origin for the mixed-used molecules).

For example, a total of 199 samples were collected in several phases from March 2017 to June 2018 to reflect variations in veterinary prescriptions, application periods and water regime (low flow or flood).
 
Results

This first study identified the presence of 18 different molecules,veterinary pharmaceutical residues (VPR), and 12 VPR in the drinking water distributed out of the 23 treatment plants exploiting these catchments

These results show frequent contamination of the Breton aquatic environment by VPRs. Concentrations are significantly lower in treated water. Nevertheless, further research is needed to quantify the associated health risks.

 

The publication

This study followed the work undertaken by the study-research group of the 2nd Regional Plan Health Environment of Brittany (PRSE2).

Conducted as part of the research project «Expo-Véto» labeled by the PRSE, this study is also part of the antibiotic plan and the national micro-pollutant plan.

It was conducted with the support of the French Biodiversity Agency, the ARS and the DREAL of Brittany, by scientists from the Ecole des Hautes Etudes de Santé Publique (via its LERES platform), Inserm, the CNRS, the University of Rennes 1, Agrocampus Ouest and Inrae, members of the joint research units: Irset and for OSUR: Emilie Jardé (Géosciences Rennes) and Anne Jaffrézic (Institut Agro, Agrocampus Ouest, SAS).

Rapport expo-Veto

>>>For more information : Lise Charuaud, Emilie Jardé, Anne Jaffrézic, Marine Liotaud, Quentin Goyat, Fabien Mercier, Barbara Le Bot, Veterinary pharmaceutical residues in water resources and tap water in an intensive husbandry area in France, Science of The Total Environment, 664, 2019, 605-615, 7, doi.org/10.1016/j.scitotenv.2019.01.303 >>>

Isabelle Dubigeon
Fri, 06/19/2020 - 10:04