{"id":13685,"date":"2026-03-16T11:57:49","date_gmt":"2026-03-16T15:57:49","guid":{"rendered":"https:\/\/culliganquebec.com\/?p=13685"},"modified":"2026-03-16T13:16:09","modified_gmt":"2026-03-16T17:16:09","slug":"agricultural-pesticides-in-monteregie-can-they-contaminate-your-well-water","status":"publish","type":"post","link":"https:\/\/culliganquebec.com\/en\/agricultural-pesticides-in-monteregie-can-they-contaminate-your-well-water\/","title":{"rendered":"Agricultural pesticides in Mont\u00e9r\u00e9gie: can they contaminate your well water?"},"content":{"rendered":"<p><span dir=\"auto\">In the Mont\u00e9r\u00e9gie region, agriculture has always been part of the landscape. Fields of vegetables, corn, or soybeans surround many municipalities. But one question is being asked more and more frequently by residents who live near farmland:<\/span><\/p>\n<p><strong><span dir=\"auto\">Are we exposed to pesticides used in these fields in the Mont\u00e9r\u00e9gie region?<\/span><\/strong><\/p>\n<p><span dir=\"auto\">A large-scale scientific study conducted in Quebec, and highlighted by\u00a0<\/span><a href=\"https:\/\/www.lapresse.ca\/actualites\/environnement\/2026-03-09\/etude-terrain-en-monteregie\/votre-urine-contient-elle-des-pesticides-agricoles.php\" target=\"_blank\" rel=\"noopener\"><span dir=\"auto\">LaPresse.ca<\/span><\/a><span dir=\"auto\">, is currently attempting to answer this question. It focuses in particular on the possible presence of pesticides in citizens&#8217; environments. At Culligan Quebec, specialists regularly observe variations in water quality depending on the region and soil composition.<\/span><\/p>\n<p><span dir=\"auto\">Here is what we know so far, and what this means in concrete terms for home and well owners in Mont\u00e9r\u00e9gie.<\/span><\/p>\n<h2><span dir=\"auto\">A unique study in Canada on pesticide exposure<\/span><\/h2>\n<p><span dir=\"auto\">Researchers from the National Institute of Scientific Research (INRS) are currently conducting a large-scale field study called EPURA, which analyzes the exposure of populations living near agricultural areas.<\/span><\/p>\n<p><span dir=\"auto\">This research is taking place in four municipalities in the Mont\u00e9r\u00e9gie region:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">Saint Clotilde<\/span><\/li>\n<li><span dir=\"auto\">Saint-R\u00e9mi<\/span><\/li>\n<li><span dir=\"auto\">Saint Isidore<\/span><\/li>\n<li><span dir=\"auto\">Saint Michael<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">In total, nearly 400 residents are participating in the study, making it the largest research of its kind ever conducted in Canada.<\/span><\/p>\n<p><span dir=\"auto\">The goal is not to diagnose diseases, but rather to understand how pesticides present in the environment can reach humans.<\/span><\/p>\n<h2><span dir=\"auto\">How researchers measure exposure to pesticides<\/span><\/h2>\n<p><span dir=\"auto\">To obtain reliable data, the researchers implemented a very rigorous protocol.<\/span><\/p>\n<p><span dir=\"auto\">Participants must provide several types of samples:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">Urine<\/span><\/li>\n<li><span dir=\"auto\">dust inside the house<\/span><\/li>\n<li><span dir=\"auto\">tap water<\/span><\/li>\n<li><span dir=\"auto\">land<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">They must also note in detail:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">their diet<\/span><\/li>\n<li><span dir=\"auto\">their water consumption<\/span><\/li>\n<li><span dir=\"auto\">certain daily habits<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">These samples are taken seven times during the study, at different times of the year.<\/span><\/p>\n<p><span dir=\"auto\">Laboratory analyses will detect the presence of more than 50 different pesticides, including:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">18 fungicides<\/span><\/li>\n<li><span dir=\"auto\">19 herbicides<\/span><\/li>\n<li><span dir=\"auto\">14 insecticides<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">This data will then make it possible to understand the pathways by which pesticides reach humans.<\/span><\/p>\n<h2><span dir=\"auto\">Why citizens are worried about pesticide exposure<\/span><\/h2>\n<p><span dir=\"auto\">Residents living near agricultural areas have expressed several concerns. Among the most frequent questions are:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">Can pesticides contaminate my well water?<\/span><\/li>\n<li><span dir=\"auto\">Can they end up in the air or in the dust of my house?<\/span><\/li>\n<li><span dir=\"auto\">Are there any long-term health effects?<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">These concerns are understandable. Some scientific research has already demonstrated associations between exposure to certain pesticides and various health effects.<\/span><\/p>\n<p><span dir=\"auto\">For example, a study published in the journal Environmental Health Perspectives showed that children with greater exposure to certain organophosphate pesticides exhibited more symptoms associated with attention deficit hyperactivity disorder (ADHD). Another study observed an association between prenatal exposure to these substances and a decrease in IQ in children.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span dir=\"auto\">It is important to clarify that these studies do not mean that all exposure automatically leads to a health problem. However, they do highlight the importance of better understanding the sources of exposure.<\/span><\/p>\n<h2><span dir=\"auto\">Can pesticides contaminate drinking water?<\/span><\/h2>\n<p><span dir=\"auto\">One of the major concerns is water. In the Mont\u00e9r\u00e9gie region, many homes in rural areas use a private well rather than municipal water. However, certain agricultural molecules can:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">seep into the soil<\/span><\/li>\n<li><span dir=\"auto\">reach the water table<\/span><\/li>\n<li><span dir=\"auto\">to find themselves in groundwater<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">According to Health Canada and the Quebec National Institute of Public Health (INSPQ), the water quality of private wells should be tested regularly, particularly in agricultural areas. Unlike municipal water systems, private wells are not automatically monitored. Therefore, the responsibility for verifying water quality falls to the property owners.<\/span><\/p>\n<h2><span dir=\"auto\">The indoor environment can also play a role<\/span><\/h2>\n<p><span dir=\"auto\">The EPURA study is not only concerned with water. The researchers also analyze:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">dust from the houses<\/span><\/li>\n<li><span dir=\"auto\">the soil of the land<\/span><\/li>\n<li><span dir=\"auto\">the ambient air<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">Why? Because pesticides can sometimes enter homes in several ways:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">by the shoes<\/span><\/li>\n<li><span dir=\"auto\">by the outside dust<\/span><\/li>\n<li><span dir=\"auto\">through the open windows<\/span><\/li>\n<li><span dir=\"auto\">by the clothing used in the fields<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">Certain simple habits could therefore help reduce exposure. For example:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">remove your shoes at the entrance<\/span><\/li>\n<li><span dir=\"auto\">clean the floors regularly<\/span><\/li>\n<li><span dir=\"auto\">limit the entry of external dust<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">The study will eventually confirm the effectiveness of these practices.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span dir=\"auto\">What the study results could change<\/span><\/h2>\n<p><span dir=\"auto\">The full results of the EPURA study will not be available until 2028. However, they could allow us to:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">to better understand the sources of exposure to pesticides<\/span><\/li>\n<li><span dir=\"auto\">to identify situations where exposure is higher<\/span><\/li>\n<li><span dir=\"auto\">to propose concrete measures to reduce it<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">This information could be useful to citizens, public authorities, and the agricultural sector alike.<\/span><\/p>\n<h2><span dir=\"auto\">What can well owners in Mont\u00e9r\u00e9gie do?<\/span><\/h2>\n<p><span dir=\"auto\">Even while awaiting the results of the study, some measures can already be taken to protect water quality.<\/span><\/p>\n<h3><span dir=\"auto\">1. Have your well water tested<\/span><\/h3>\n<p><span dir=\"auto\">An analysis can be performed to check for the possible presence of:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">bacteria<\/span><\/li>\n<li><span dir=\"auto\">nitrates<\/span><\/li>\n<li><span dir=\"auto\">pesticides<\/span><\/li>\n<li><span dir=\"auto\">heavy metals<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">Its main benefit is determining whether treatment is necessary. At Culligan Qu\u00e9bec, water specialists regularly assist homeowners who want to test the quality of their drinking water.<\/span><\/p>\n<p><span dir=\"auto\">An analysis can detect certain agricultural contaminants, bacteria, nitrates, or metals naturally present in the soil.<\/span><\/p>\n<p><span dir=\"auto\">Depending on the results, different treatment solutions can be recommended to improve water quality at home.<\/span><\/p>\n<p><em><span dir=\"auto\">You can request a water analysis by filling out the form on the left side of the article.<\/span><\/em><\/p>\n<h3><span dir=\"auto\">2. Install a suitable filtration system<\/span><\/h3>\n<p><span dir=\"auto\">Depending on the water composition, specialized\u00a0<\/span><span dir=\"auto\">filtration systems<\/span><span dir=\"auto\">\u00a0for nitrites and nitrates could be considered.<\/span><\/p>\n<h3><span dir=\"auto\">3. Monitor water quality regularly<\/span><\/h3>\n<p><span dir=\"auto\">Water quality can change over time. Regular testing allows for the early detection of any changes.<\/span><\/p>\n<h2><span dir=\"auto\">Why water monitoring is particularly important in agricultural areas<\/span><\/h2>\n<p><span dir=\"auto\">The Mont\u00e9r\u00e9gie region is one of Quebec&#8217;s most important agricultural regions. This means that residents benefit from:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">of local food production<\/span><\/li>\n<li><span dir=\"auto\">of a dynamic agricultural economy<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">But this also implies a close relationship with certain agricultural practices, including the use of pesticides. In this context, monitoring water quality becomes a simple and useful preventative measure.<\/span><\/p>\n<h2><span dir=\"auto\">Frequently asked questions about pesticides and drinking water<\/span><\/h2>\n<h3><span dir=\"auto\">Can pesticides contaminate well water?<\/span><\/h3>\n<p><span dir=\"auto\">Under certain conditions, some pesticides used in agriculture can seep into the soil and reach groundwater. However, their presence depends on several factors such as soil type, well depth, and agricultural practices.<\/span><\/p>\n<h3><span dir=\"auto\">Is well water automatically analyzed in Quebec?<\/span><\/h3>\n<p><span dir=\"auto\">No. Unlike municipal water systems, private wells are not monitored by public authorities. Owners must have their water tested themselves to verify its quality.<\/span><\/p>\n<h3><span dir=\"auto\">How often should well water be tested?<\/span><\/h3>\n<p><span dir=\"auto\">Public health authorities generally recommend testing water at least twice a year for bacteria and periodically for other contaminants.<\/span><\/p>\n<h3><span dir=\"auto\">Have pesticides ever been detected in drinking water?<\/span><\/h3>\n<p><span dir=\"auto\">Some scientific studies have detected traces of pesticides in the environment, particularly in soil, air, and sometimes groundwater. The concentrations observed vary depending on the region and agricultural practices.<\/span><\/p>\n<h1><span dir=\"auto\">Sources<\/span><\/h1>\n<ul>\n<li><span dir=\"auto\">INRS \u2013 National Institute of Scientific Research<\/span><br \/>\n<a href=\"https:\/\/translate.google.com\/website?sl=fr&amp;tl=en&amp;hl=fr&amp;client=webapp&amp;u=https:\/\/inrs.ca\" target=\"_blank\" rel=\"noopener\"><span dir=\"auto\">https:\/\/inrs.ca<\/span><\/a><\/li>\n<li><span dir=\"auto\">EPURA Study \u2013 Exposure to pesticides used in agricultural areas<\/span><\/li>\n<li><span dir=\"auto\">La Presse \u2013 Ariane Krol<\/span><br \/>\n<a href=\"https:\/\/translate.google.com\/website?sl=fr&amp;tl=en&amp;hl=fr&amp;client=webapp&amp;u=https:\/\/www.lapresse.ca\" target=\"_blank\" rel=\"noopener\"><span dir=\"auto\">https:\/\/www.lapresse.ca<\/span><\/a><\/li>\n<li><span dir=\"auto\">Environmental Health Perspectives \u2013 Research on pesticide exposure<\/span><br \/>\n<a href=\"https:\/\/translate.google.com\/website?sl=fr&amp;tl=en&amp;hl=fr&amp;client=webapp&amp;u=https:\/\/ehp.niehs.nih.gov\" target=\"_blank\" rel=\"noopener\"><span dir=\"auto\">https:\/\/ehp.niehs.nih.gov<\/span><\/a><\/li>\n<li><span dir=\"auto\">Health Canada \u2013 Drinking Water Quality<\/span><br \/>\n<a href=\"https:\/\/translate.google.com\/website?sl=fr&amp;tl=en&amp;hl=fr&amp;client=webapp&amp;u=https:\/\/www.canada.ca\" target=\"_blank\" rel=\"noopener\"><span dir=\"auto\">https:\/\/www.canada.ca<\/span><\/a><\/li>\n<li><span dir=\"auto\">National Institute of Public Health of Quebec (INSPQ)<\/span><br \/>\n<a href=\"https:\/\/translate.google.com\/website?sl=fr&amp;tl=en&amp;hl=fr&amp;client=webapp&amp;u=https:\/\/www.inspq.qc.ca\" target=\"_blank\" rel=\"noopener\"><span dir=\"auto\">https:\/\/www.inspq.qc.ca<\/span><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In the Mont\u00e9r\u00e9gie region, agriculture has always been part of the landscape. Fields of vegetables, corn, or soybeans surround many municipalities. But one question is being asked more and more frequently by residents who live near farmland: Are we exposed to pesticides used in these fields in the Mont\u00e9r\u00e9gie region? A large-scale scientific study conducted [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":13686,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[194],"tags":[],"class_list":["post-13685","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-2"],"_links":{"self":[{"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/posts\/13685","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/comments?post=13685"}],"version-history":[{"count":1,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/posts\/13685\/revisions"}],"predecessor-version":[{"id":13688,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/posts\/13685\/revisions\/13688"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/media\/13686"}],"wp:attachment":[{"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/media?parent=13685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/categories?post=13685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/culliganquebec.com\/en\/wp-json\/wp\/v2\/tags?post=13685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}