{"id":26544,"date":"2025-01-07T12:00:28","date_gmt":"2025-01-07T17:00:28","guid":{"rendered":"https:\/\/www.laval.ca\/eau-contaminee-penurie\/"},"modified":"2025-09-03T14:52:57","modified_gmt":"2025-09-03T18:52:57","slug":"water-shortage-contamination","status":"publish","type":"page","link":"https:\/\/www.laval.ca\/en\/public-security\/emergency-measures-civil-security\/emergency-situations\/water-shortage-contamination\/","title":{"rendered":"Shortage or contamination of drinking water"},"content":{"rendered":"<section class=\"sticky-section-group aligndefault\"\n>\n   \n<div class=\"sticky-section-main\"\n>\n   \n\n<p class=\"is-style-intro-text\">Several factors can lead to a contamination or shortage of drinking water. Under extreme heat conditions or when the region is affected by flooding, it\u2019s important to exercise increased caution.\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">When to boil water before drinking it<\/h2>\n\n\n\n<p>Residents are advised to boil their water for at least one minute if:\u00a0\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It gives off a smell.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It doesn\u2019t taste right.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It has a colour.\u00a0<\/li>\n<\/ul>\n\n\n\n<p>If you suspect a chemical contamination, please do not consume the tap water and contact 311.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How the City of Laval informs its residents\u00a0<\/h2>\n\n\n\n<p>When drinking water is affected by a water main break, a chemical spill into the water reservoir, a flood or a drought, the City of Laval can issue three types of notices:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A boil water advisory\u202f\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A drinking water advisory\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A temporary water interruption notice\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p>When the city plans to cut the water supply, it leaves a door hanger (small poster) at the entrance to your home to notify you.&nbsp;<\/p>\n\n\n\n<p>For further information about guidelines or to <strong>receive alerts<\/strong> related to an important notice or an emergency situation,\u202f<a href=\"https:\/\/www.laval.ca\/Pages\/Fr\/Citoyens\/avis-concernant-eau-potable.aspx\" target=\"_blank\" rel=\"noreferrer noopener\">please view the Web page concerning drinking water<\/a>.\u202f<\/p>\n\n\n\n<p>Please observe the following guidelines to ensure your health and safety:&nbsp;<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Comply with the notices.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Follow the <a href=\"https:\/\/www.laval.ca\/Pages\/Fr\/Citoyens\/preparation-sinistre.aspx\" target=\"_blank\" rel=\"noreferrer noopener\">72-hour autonomy program<\/a> by keeping a reserve of bottled drinking water at home.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>If your water comes from an individual well, an artesian well or a surface well, exercise caution and have it <a href=\"http:\/\/www.ceaeq.gouv.qc.ca\/accreditation\/PALA\/lla03.htm\" target=\"_blank\" rel=\"noreferrer noopener\">analyzed<\/a>\u202f on a regular basis, then <a href=\"http:\/\/www.mddep.gouv.qc.ca\/eau\/potable\/depliant\/index.htm#calcul\" target=\"_blank\" rel=\"noreferrer noopener\">disinfect your wells <\/a>as needed.\u00a0<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">In the event of extreme heat<\/h2>\n\n\n\n<p>Under extreme heat conditions, it is vital that Laval residents have access to a plentiful supply of water to drink and cool off. For that reason, the city may issue watering restrictions to ensure that water reserves are earmarked for residents.&nbsp;<\/p>\n\n\n\n<p>These restrictions are applied during drought periods and communicated on this page. Residents can also sign up to receive <a href=\"https:\/\/infolettre.laval.ca\/T\/WF\/14321\/eewxbf\/Optin\/fr-CA\/Form.ofsys?_gl=1*p8i28j*_gcl_aw*R0NMLjE3MjI0NDUwOTUuQ2owS0NRand3YWUxQmhDX0FSSXNBSzRKZnJ6dTE3a1FtQ1VnNnFjdnp5RzlRY1dfY01ZcGh5THRjamlrVFZBa1dWSXdUZ2Z0ZFZOU2VMQWFBbG95RUFMd193Y0I.*_gcl_au*NjEzNzM4MTYyLjE3MTc2MDg3NTY.*_ga*MTEyNTg0ODg0NS4xNzE0NTg4Njk5*_ga_G6H5B2R1FL*MTcyMjQ0NDAxOC4xMTcuMS4xNzIyNDQ1MTMwLjI0LjAuMA..\" target=\"_blank\" rel=\"noreferrer noopener\">alerts from the City of Laval<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">In the event of flooding<\/h2>\n\n\n\n<p>Flooding can cause the municipal water supply to become contaminated. Before consuming the tap water, view <a href=\"https:\/\/www.laval.ca\/Pages\/Fr\/Citoyens\/avis-concernant-eau-potable.aspx\" target=\"_blank\" rel=\"noreferrer noopener\">the drinking water notices and advisories issued by the City of Laval<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Drinking water wells<\/h3>\n\n\n\n<p>When water supply wells are submerged in floodwaters, the drinking water can become contaminated. When contamination does occur, wait for the waters to recede before cleaning and disinfecting the wells, then conduct a water quality test to ensure that the water is safe for consumption.&nbsp;<\/p>\n\n\n\n<p>When supply wells are contaminated, residents must wait <a href=\"https:\/\/www.laval.ca\/Pages\/Fr\/Citoyens\/avis-concernant-eau-potable.aspx\" target=\"_blank\" rel=\"noreferrer noopener\">for confirmation from the City of Laval that the advisory has been lifted<\/a> before consuming the water again.\u00a0<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Septic tanks<\/h3>\n\n\n\n<p>A flood can choke septic tanks, which in turn can cause a significant drop in pressure and even render plumbing fixtures unusable.&nbsp;&nbsp;<\/p>\n\n\n\n<p>The following steps should be taken while waiting for the septic tank to become fully functional again:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduce or even stop your use of certain equipment that discharges water toward the septic system (toilet, shower, washer, etc.).\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Avoid all contact with waters from septic systems.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Do not drain the septic tank.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Do not consume the water if you suspect a chemical\u200b\u00a0\u00a0\u00a0\u00a0 \u200bcontamination.\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Private wells<\/h3>\n\n\n\n<p>After a flood, it is safer to assume that your well water is non-potable, even if it appears clear and odor-free. Until you can <a href=\"https:\/\/www.environnement.gouv.qc.ca\/eau\/potable\/depliant\/index.htm#calcul\" target=\"_blank\" rel=\"noreferrer noopener\">disinfect your well<\/a> and have your water tested by a <a href=\"https:\/\/www.ceaeq.gouv.qc.ca\/accreditation\/PALA\/lla03.htm#laval\" target=\"_blank\" rel=\"noreferrer noopener\">certified laboratory<\/a>, you should:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Drink bottled water.&nbsp;<\/li>\n\n\n\n<li>Consume water that has been boiled for at least one minute.&nbsp;<\/li>\n<\/ul>\n\n<\/div>\n\n\n<div class=\"sticky-section-sidebar\"\n>\n   <div class=\"sticky-section-sidebar__inner\">\n     \n<div class=\"sidebar-cta-wrapper aligndefault\">\n   <div class=\"sidebar-cta\">\n     \n  <div class=\"theme-icon aligndefault theme-icon--colored\">\n    <span class=\"theme-icon__icon icon icon-alert-triangle\"><\/span>\n  <\/div>\n  \n\n\n<p class=\"has-xlarge-font-size\"><strong><strong>Don\u2019t miss anything<\/strong><\/strong><\/p>\n\n\n\n<p>Receive alerts in case of important notices or emergency situations.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/infolettre.laval.ca\/T\/WF\/14321\/eewxbf\/Optin\/fr-CA\/Form.ofsys?_gl=1*p8i28j*_gcl_aw*R0NMLjE3MjI0NDUwOTUuQ2owS0NRand3YWUxQmhDX0FSSXNBSzRKZnJ6dTE3a1FtQ1VnNnFjdnp5RzlRY1dfY01ZcGh5THRjamlrVFZBa1dWSXdUZ2Z0ZFZOU2VMQWFBbG95RUFMd193Y0I.*_gcl_au*NjEzNzM4MTYyLjE3MTc2MDg3NTY.*_ga*MTEyNTg0ODg0NS4xNzE0NTg4Njk5*_ga_G6H5B2R1FL*MTcyMjQ0NDAxOC4xMTcuMS4xNzIyNDQ1MTMwLjI0LjAuMA..\" target=\"_blank\" rel=\"noopener\">Sign up to receive our alerts<\/a><\/div>\n<\/div>\n\n   <\/div>\n<\/div>\n\n   <\/div>\n<\/div>\n\n<\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":31,"featured_media":0,"parent":26668,"menu_order":79,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":""},"class_list":["post-26544","page","type-page","status-publish","hentry"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"coauthors":[],"author_meta":{"author_link":"https:\/\/www.laval.ca\/en\/author\/j-bouliannelaval-ca\/","display_name":"j.boulianne@laval.ca"},"relative_dates":{"created":"Posted 1 year ago","modified":"Updated 8 months ago"},"absolute_dates":{"created":"Posted on January 7, 2025","modified":"Updated on September 3, 2025"},"absolute_dates_time":{"created":"Posted on January 7, 2025 12:00 pm","modified":"Updated on September 3, 2025 2:52 pm"},"featured_img_caption":"","featured_img":false,"series_order":"","publishpress_future_action":{"enabled":false,"date":"2026-05-02 04:49:18","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"translation_priority","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/pages\/26544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/users\/31"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/comments?post=26544"}],"version-history":[{"count":8,"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/pages\/26544\/revisions"}],"predecessor-version":[{"id":90010,"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/pages\/26544\/revisions\/90010"}],"up":[{"embeddable":true,"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/pages\/26668"}],"wp:attachment":[{"href":"https:\/\/www.laval.ca\/en\/wp-json\/wp\/v2\/media?parent=26544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}