Nation-Wide Monitoring Campaign of 53 Contaminants of Emergent Concern in Surface Waters and Sediment (EMNAT 2018): Occurrence and PNEC Exceedance Evaluation

Azziz Assoumani (1) , Francois Lestremau (1) , Céline Ferret (1) , Bénédicte Lepot (1) , Morgane Salomon (1) , Hélène Budzinski (2) , Marie-Hélène Dévier (2) , Pierre Labadie (2) , Karyn Le Menach (2) , Patrick Pardon (2) , Laure Wiest (3) , Emmanuelle Vulliet (3) , Pierre-François Staub (4)

1 INERIS - Institut National de l'Environnement Industriel et des Risques
2 EPOC - Environnements et Paléoenvironnements OCéaniques
3 ISA - Institut des Sciences Analytiques
4 AFB - Agence Française pour la Biodiversité

The overall objective of the 2018 campaign to monitor substances of emerging concern in surface water (continental and coastal) and sediment, known as EMNAT 2018, is to provide the exercise of prioritization of emerging substances, which is being carried out in 2020, with monitoring data. This exercise should make it possible to update the list of relevant substances to be monitored (SPAS) as part of future WFD monitoring programmes, which will be implemented in the next water body management cycle (2022).This campaign, led by Ineris, collected nearly 14,000 data regarding 53 substances of emerging concern (36 biocides and 17 surfactants, selected by the Prioritization Experts Committee) in surface water and sediments on a total of 98 sites in metropolitan France and in the overseas departments and regions (DROM). Frequencies of quantification and concentration levels were determined and discussed. Warning indicators, calculated from PNEC (predicted no-effect concentrations), allowed to estimate the criticality of the risk of exceeding them (frequency and degree of PNEC exceedance).Regarding impregnation levels in the environment, with respect to surfactants, Linear Alkybenzene Sulfonic acids (LAS) were the most frequently quantified substances and at the highest median concentrations in water and sediment samples, in metropolitan France and in the DROM. Regarding biocides, fipronil was the most frequently quantified substance in water samples in metropolitan France and in the DROM, but at lower median concentrations than other biocides. Methyl nonyl ketone was the most frequently quantified substance and at higher median concentrations in sediment samples from metropolitan France and in the DROM.Based on the available PNECs, the highly critical substances with respect to exceeding the PNEC are:- LAS C11, C12 and C13 in mainland and the DROM water and sediment samples, - methyl nonyl ketone in mainland and the DROM sediment samples, - fipronil and methylisothiazolinone in mainland water samples, and - fipronil, octylisothiazolinone, methyl nonyl ketone and a triethanolamine based esterquat in mainland sediment samples.

Domaines: Ecotoxicologie

Azziz Assoumani, Francois Lestremau, Céline Ferret, Bénédicte Lepot, Morgane Salomon, et al.. Nation-Wide Monitoring Campaign of 53 Contaminants of Emergent Concern in Surface Waters and Sediment (EMNAT 2018): Occurrence and PNEC Exceedance Evaluation. 31. SETAC Europe annual meeting, Jun 2021, Online, Belgium. ⟨ineris-03273938⟩