{"id":544355,"date":"2026-08-27T00:59:52","date_gmt":"2026-08-26T22:59:52","guid":{"rendered":"https:\/\/dev.phytocontrol.com\/uncategorized\/national-monitoring-campaign-for-emerging-compounds-in-drinking-water\/"},"modified":"2026-08-27T00:59:53","modified_gmt":"2026-08-26T22:59:53","slug":"national-monitoring-campaign-for-emerging-compounds-in-drinking-water","status":"publish","type":"post","link":"https:\/\/dev.phytocontrol.com\/en\/regulatory-watch\/national-monitoring-campaign-for-emerging-compounds-in-drinking-water\/","title":{"rendered":"National monitoring campaign for emerging compounds in drinking water"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"wp-block-paragraph\">As part of its mandate as national reference laboratory for water intended for human consumption (drinking water), the ANSES Hydrology Laboratory of Nancy conducted a study in which various emerging compounds were investigated over the period 2020-2021 in drinking water:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>157 pesticides and metabolites<\/li>\n\n\n\n<li>54 explosive residues<\/li>\n\n\n\n<li>1,4-dioxane<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">A campaign of raw and treated water sampling was organised across all French departments. The study covered 300 sample pairs (raw water\/treated water), with two-thirds of the treated water coming from groundwater sources and one-third from surface water sources.<\/p>\n\n<p class=\"wp-block-paragraph\">Regarding pesticides and pesticide metabolites, of the 157 molecules investigated, 89 were quantified at least once. Metabolites are more frequently quantified than the corresponding active substances. The metabolites <strong>chlorothalonil R471811<\/strong> and <strong>metolachlor ESA<\/strong> are the most frequently quantified molecules, with over 50% quantification rates in treated water.<\/p>\n\n<p class=\"wp-block-paragraph\">Chlorothalonil R471811, a relevant metabolite of chlorothalonil (banned for use as a plant protection product in France since 2020), is the compound that was most frequently quantified (in more than one sample out of two), with the highest frequency of exceeding 0.1 \u03bcg\/L: more than one sample out of three (34%, 102 samples). Other compounds with the highest non-compliance frequencies are the metabolites chlorothalonil SA, chloridazon-desphenyl (DPC) and chloridazon-methyl-desphenyl (Me-DPC), with 3.7%, 3.3% and 2.7% of non-compliant samples respectively.<\/p>\n\n<p class=\"wp-block-paragraph\">Regarding explosive residues, of the 54 molecules investigated, 18 were quantified at least once. Quantification was found in fewer than 10% of samples. These quantifications mainly concerned points of interest (selected by the ARS due to their vulnerability) of groundwater origin, with a maximum concentration of 0.85 \u03bcg\/L observed for RDX. The molecules quantified were mainly:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>TNT metabolites, 2,4-DNT and 2,6-DNT, in the northern and eastern regions of France linked to the First World War, showing a good correlation with perchlorate ion levels.<\/li>\n\n\n\n<li>More recently used molecules such as HMX and RDX, which may relate to industrial (quarries, mines) or military uses.<\/li>\n\n\n\n<li>Molecules of industrial-military origin such as 1-nitronaphthalene (powder works).<\/li>\n\n\n\n<li>Molecules of other industrial origin: DPA and 2-nitrophenol.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Regarding 1,4-dioxane, this campaign highlights a moderate occurrence in water resources, with 8% of the sources investigated showing results above the limit of quantification (0.15 \u03bcg\/L). This contamination affects both surface and groundwater resources equally. The results tend to confirm the industrial origin of this compound in water, with 63% of positive samples linked to industrial discharges.<\/p>\n\n<p class=\"wp-block-paragraph\">You will find the full study via the link below:<\/p>\n\n<p class=\"wp-block-paragraph\"><a href=\"\/wp-content\/uploads\/2023\/04\/Campagne-Composes-emergents-waters.pdf\">National monitoring campaign on the occurrence of emerging compounds in water intended for human consumption<\/a><\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Please note that Phytocontrol holds the national approval of the Ministry of Health and the Environment for sampling and analyses under the health monitoring of water.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">You will find the details of our accreditations in our COFRAC technical annex N\u00b01-6066.<\/p>\n\n<p class=\"wp-block-paragraph\">Need technical, regulatory or pricing information? Our customer service is available from 8am to 8pm, Monday to Friday, at <a href=\"tel:+33800900775\">+33 800 900 775<\/a> or <a href=\"mailto:service-clients@phytocontrol.com\">service-clients@phytocontrol.com<\/a>.<\/p>\n\n<p class=\"wp-block-paragraph\">And to keep up with all Phytocontrol news, join us on our <a href=\"https:\/\/www.linkedin.com\/company\/phytocontrol-waters\/\">LinkedIn<\/a> page!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As part of its mandate as national reference laboratory for water intended for human consumption&hellip;<\/p>\n","protected":false},"author":2,"featured_media":21657,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[181],"tags":[],"class_list":["post-544355","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-regulatory-watch"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.5) - 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