North Bay’s PFAS problem: 5 things to know about a ‘forever chemicals’ hotspot in Ontario
By Leah Borts-Kuperman, The Narwhal
The Great Lakes News Collaborative includes Bridge Michigan, Circle of Blue, Great Lakes Now at Detroit PBS, Michigan Public and The Narwhal who work together to bring audiences news and information about the impact of climate change, pollution, and aging infrastructure on the Great Lakes and drinking water. This independent journalism is supported by the Charles Stewart Mott Foundation. Find all the work HERE.
Gathered in an arena in North Bay, Ont., in summer 2024, federal officials told hundreds of concerned citizens how they planned to remediate longstanding contamination of the city’s waterways left behind by the Department of National Defence. A few months later, officials gave a similar presentation to a packed hotel conference room.
For nearly a decade now, residents have known about the contamination. Some have been told not to drink the water from their own wells, and everyone in the city has been warned not to drink water or eat fish from a creek outside town.
The creek is part of a system of waterways where carcinogenic “forever chemicals” run downstream from a military base, emptying into Trout Lake, the source of the city’s drinking water. It sits at nearly double Health Canada’s guideline for PFAS in drinking water, measured in nanograms per litre.
Health Canada published an “objective” level of 30 nanograms per litre in August 2024 for 25 chemicals in the PFAS family. That’s less than half of what Ontario currently recommends: 70 nanograms per litre, pertaining to just 11 PFAS chemicals. And that’s just a suggestion, not a binding regulation.
The city did not reply to The Narwhal’s detailed questions regarding the current state of the drinking water supply, but CBC reported in February 2026 that Trout Lake contained around 58 nanograms of PFAS per litre of water.
Thousands of substances classified as per- and polyfluoroalkyl substances, known as PFAS, are used to make everything from medical equipment to waterproof clothing. They can generate hazardous waste which, if not disposed of carefully, contaminates air, water and soil — where it can remain for 1,000 years, hence their other nickname, “forever chemicals.”
Statistics Canada reports almost all Canadians already have PFAS in their bodies, including in remote regions such as the Arctic and subarctic.
In North Bay, the issue is top of mind, with a class-action lawsuit, a lengthy and expensive remediation plan and a new factory importing chemicals from the Teflon-like subgroup of PFAS, called PTFE. And the company behind that factory, Industrial Plastics Canada, is one of the 10 major importers of PTFE in Canada.
While PFAS have been making global headlines for years as an emerging threat to the environment and our bodies, North Bay knows the issue intimately; citizens fear for their water as politicians try to clean up the mess.
Here’s everything you need to know about PFAS in North Bay.
1. North Bay’s PFAS contamination comes from firefighting foam
From the early 1970s to the mid-1990s, the Department of National Defence used a fire suppression foam containing PFAS to train firefighters across Canada, including near the North Bay Jack Garland Airport. In 2016, after the North Bay Parry Sound District Health Unit learned PFAS had been identified by the Department of National Defence in waterways around the city, it commissioned consulting firm Stantec to assess the impacts on soil and groundwater.
It’s the invisible nature of these chemicals that are part of what makes them so insidious; you can’t see them or smell them, so you don’t know they’re there without testing.
“When you look at a mine, for example, you can see it and say, ‘That’s obviously disruptive to our ecosystem.’” North Bay-based environmental anthropologist Carly Dokis previously told The Narwhal. “But these things are invisible pollutants, which then tend to attract less public awareness.”
Stantec found PFAS from the foam had contaminated soil, bedrock, groundwater, private wells and several waterways in the region including Trout Lake, Lake Nipissing and Lees, Dorlan, Chippewa and La Vase creeks and surrounding areas.
In 2025, reporting by the Investigative Journalism Bureau surfaced a report by the Royal Military College showing the Department of National Defence found elevated PFAS levels around the base as far back as 2012. That means the department knew about the contamination for five years before revealing it to the City of North Bay in 2016, and the public in 2017.
2. PFAS impacts health, environment and property values. Residents are seeking recompense
In late 2025, North Bay citizens filed a proposed class-action lawsuit asking for remediation, safe drinking water and $105 million in damages for residents living within a three-kilometre radius of the 22 Wing Canadian Forces Base and Jack Garland Airport. Some of the people who live closest to the contamination have been receiving bottled water from the government for years, but have had no other opportunity for recourse.
The proposed lawsuit, if certified by the court, would be against the City of North Bay and the Attorney General of Canada, on behalf of the Department of National Defence, focusing on the loss of property value and remediation costs. The case is also seeking punitive damages, contending that National Defence was aware of the contamination long before warning residents.
Not mentioned in the suit is the long list of health concerns associated with “forever chemicals.”
The United States Environmental Protection Agency lists potential health risks of exposure to PFAS, including reproductive problems like infertility, developmental effects in children, increased risk of certain cancers and weakening of the body’s immune system, including reduced vaccine response. The Canadian government says PFAS can be transferred through the placenta during pregnancy, and infants can be exposed through human milk.
Ecosystems are affected, too. Studies have shown exposure to per- and polyfluoroalkyl substances can stunt plant growth and cause reduced seed germination and ability to photosynthesize. The chemicals can build up in the organs of living creatures throughout the food chain. In the district of Nipissing, that poses a risk to people who hunt, fish and harvest from the land.
“These industrial areas are often surrounded by lower-income buildings and peoples and communities,” Curtis Avery, environment department manager with Nipissing First Nation, told The Narwhal in summer 2023. “We’re the most vulnerable group of people that utilize our lands — the lands are our grocery stores. … If these are being impacted, we need to know.”
3. Cost of North Bay clean-up grew five-fold, to more than $100 million
In 2021, the City of North Bay announced plans to begin remediation under a “shared responsibility” agreement between the Department of National Defence and the city. The federal department would cover 97 per cent of the costs, or $19.4 million, and the city would cover the remaining three per cent, at $600,000. But costs have ballooned since then; in December 2025, National Defence announced it would contribute another nearly $100 million to the remediation, with the city’s share rising to more than $3.6 million. The total for the cleanup project has risen to more than $122 million.
The remediation, which began on the ground in 2024, includes excavating and disposing of about 26,000 tonnes of PFAS-impacted soil; injecting activated carbon material into particularly dense patches of PFAS to stop the underground plume from spreading; and installing a filtration system to treat water leaving the site.
“We remain committed to addressing and managing the operational legacy of the Canadian Armed Forces responsibly,” Minister of National Defence David J. McGuinty said in a news release.
As part of the process, a notice went up on the federal Impact Assessment Agency registry on April 28, inviting the public to comment up until June 5 on a proposal to install a 250-metre permeable barrier in the ground to help filter impacted groundwater. A spokesperson for the agency said its role in the project is to offer advice on determining its environmental effects, as well as providing the opportunity to post the project on the registry.
Local organizations, including the environmental group Northwatch, said in a press release that they were concerned about “very limited public engagement over the last ten years since the public disclosure of the contamination,” counting only the two forums in 2024 and 2025, where there was “limited opportunities for the public to ask questions.”
Northwatch’s project coordinator Brennain Lloyd told The Narwhal about the public notice period, which she said her organization only learned of in a daily bulletin from the Impact Assessment Agency listing multiple assessment notices from across the country.
“To the best of our knowledge there were no local announcements or invitations to comment issued to the many residents and organizations who have identified their interest in this program,” a release from Northwatch reads.
The Department of National Defence did not respond to questions from The Narwhal.
4. North Bay’s not alone: contaminated military bases affect communities across Canada
Contamination on federal sites is an issue across Canada. There are thousands of contaminated sites listed on the federal contaminated sites inventory, and PFAS are found on more than 100 of them. These include at least 26 National Defence sites including bases in Trenton, Ont., Gagetown, N.B., and Moose Jaw, Sask.
And contaminants don’t stop at the fenceline. Health Canada says some contaminants can travel long distances through soil, water and air: “PFAS can be found in fresh water and drinking water in areas that are far away from where they entered the environment,” according to the department’s website.
5. Industry is still importing PFAS-class chemicals into North Bay
While the Canadian government no longer uses firefighting foam that contains PFAS, industry continues to bring these substances into the country. In 2023, The Narwhal reported on an international plastics conglomerate that opened its first Canadian location, Industrial Plastics Canada, in North Bay. The company has a presence across Europe as well as in India and China, billing itself as one of the “largest worldwide manufacturers of PTFE products.”
PTFE, or polytetrafluoroethylene, is a Teflon-like product in a subgroup of PFAS known as fluoropolymers, or fluoroplastics. A company spokesperson previously told The Narwhal the use of PTFE at the factory will not produce waste and poses “no risk.” The company also says fluoropolymers aren’t as dangerous as other PFAS and are “considered safe, non-bioaccumulative and non-toxic.”
But fluoropolymers have been found to be dangerous to human health, according to research published in the peer-reviewed journal Environmental Science & Technology and others.
In 2023, Health Canada released a draft assessment of the state of PFAS in Canada to help decide how to regulate the class of chemicals. In it, the agency cited an industry-funded study that said fluoropolymers should be considered separately from other PFAS as “polymers of low concern.” A Health Canada spokesperson said the agency, along with Environment and Climate Change Canada, “examined information from a wide range of sources,” including scientific journals and reports while preparing the state of PFAS report.
The substances were ultimately excluded from the final report, released in March 2025, in which Health Canada proposed classifying the remaining PFAS chemicals as toxic substances under the Canadian Environmental Protection Act.
The Health Canada spokesperson said in an email that fluoropolymers “have specific properties that differentiates them from other PFAS,” which led to their exclusion from the final report. They added that the exclusion “should not be interpreted as meaning they are or are not of concern,” and that a separate fluoropolymer assessment is currently underway.
The exclusion of PTFE from that classification was a major priority for industry, Rémy Alexandre, toxics project lead at environmental law non-profit EcoJustice, told The Narwhal.
According to data collected by Alexandre, who studied Industrial Plastics Canada’s imports to North Bay, the company brought in almost 207,000 kilograms of PTFE from India and China from July 2025 to May 2026.
This puts the facility on the list of the 10 major importers of PTFE in Canada, alongside U.S.-based chemicals company Chemours, a spinoff of Dupont that has been arguing that the European Union should exempt fluoropolymers from their regulations, too.
“The decision to site this plant in a community that is an existing hotspot for PFAS raises concerns,” Alexandre told The Narwhal. “And so does the selection of a jurisdiction that isn’t regulating fluoropolymers.”
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