A note before you read. This is general consumer information for Nunavut homeowners, buyers, sellers, landlords, and renters, drawn from publicly available Health Canada, Government of Nunavut, and peer-reviewed sources. It is not medical, legal, or warranty advice. Radon results are reported against the Health Canada guideline of 200 Bq/m³; RadonTest.ca coordinates testing logistics and does not interpret individual results or provide health assessments.
Key facts: radon in Nunavut at a glance
- Nunavut has the least radon data of any place in Canada. Health Canada's Cross-Canada Survey found 0% of Nunavut homes above the 200 Bq/m³ guideline — but that was from just 78 homes, the smallest sample and lowest response rate in the country. "None found in 78 homes" is not the same as "no radon risk in Nunavut," and a more recent 2024 national study had no Nunavut data at all.
- Radon is the number one cause of lung cancer in non-smokers and the second leading cause overall, after smoking — everywhere in Canada, Nunavut included.
- Geology likely keeps many Nunavut homes low — but not all. Continuous permafrost can act as a "cap" that slows radon's escape from the ground, and many Nunavut buildings sit on piles, which reduces the pathway indoors. Neither factor guarantees a low result in any specific home.
- The Health Canada guideline is 200 Bq/m³ (annual average). If your long-term result is above it, Health Canada recommends taking corrective action within one year — sooner the higher the level.
- Nunavut has no new-home warranty covering radon, no territorial radon grant, and no dedicated radon program. The federal nature of most large workplaces means a new 200 Bq/m³ workplace limit will apply to them from around early 2027.
- Testing takes a minimum of 91 days (a long-term test) — and in a territory this under-tested, your own home's test is the only reliable information available.
How much radon is in Nunavut homes?
Radon is a naturally occurring radioactive gas with no colour, smell, or taste. It seeps up from the breakdown of uranium in soil and bedrock and accumulates indoors. The honest answer to "how much radon is in Nunavut homes" is: almost no one has measured, so no one really knows.
Here is the entirety of the public picture:
- Health Canada's Cross-Canada Survey of Radon Concentrations in Homes (data collected 2009–2011, published 2012). Of 78 valid Nunavut results — the smallest provincial/territorial sample in the survey, with the lowest response rate in the country — none were at or above 200 Bq/m³. Health Canada grouped Nunavut with Prince Edward Island as having the lowest measured levels. The critical caveat is the sample: a 0% result from 78 homes a decade-plus ago is weak evidence. It tells you high radon wasn't common in those particular homes; it does not establish that Nunavut is radon-free.
- The 2024 Evict Radon / University of Calgary national study. This survey had no access to indoor radon test results from Nunavut and excluded the territory from all of its regional figures, explicitly noting a "near-term need" to make sure radon levels in this part of Canada are explored and reported.
So Nunavut sits in an unusual position: it has the lowest measured radon prevalence in Canada and the least evidence behind that number. Both things are true at once. For how the rest of the country compares, see our radon levels by province breakdown.
What this means for you: a territory-wide "0%" from 78 homes can't tell you about your house. There is no substitute for testing your own home — and in Nunavut, doing so also adds to a dataset the whole territory is missing.
Radon by region in Nunavut
There is no community-level radon data for Nunavut — no Iqaluit rate, no breakdown by region. This is a genuine data gap, not an omission on our part. The only radon measurement on record from within Nunavut is an outdoor monitoring study at Resolute (which tracks outdoor radiation dose, not indoor home levels), so it doesn't tell you anything about the air inside a Nunavut home.
Because there is no regional pattern to report, the guidance is simple and the same everywhere in the territory: the only way to know any specific home's level — in Iqaluit or any community — is to test that home.
Why Nunavut's measured levels are low — and why that isn't the whole story
Radon levels track the amount of uranium and thorium in the ground beneath a home, and how easily that radon can reach indoor air. Two features of Nunavut plausibly keep many homes low:
- Continuous permafrost. Across most of Nunavut the ground is permanently frozen. Analyses summarized by the National Collaborating Centre for Environmental Health describe permafrost as acting like a "cap" that slows the movement of radon gas from the ground to the surface — which would tend to reduce how much enters homes.
- Pile and slab construction. Many Nunavut buildings are built elevated on piles rather than on basements dug into the ground, which reduces the main pathway by which radon enters a home.
These are real reasons Nunavut's measured levels are low, and they may well hold for many homes. But two cautions keep this from being a clean bill of health. First, the permafrost "cap" is changing: as the climate warms and permafrost thaws, radon that was trapped underground is expected to be released — peer-reviewed monitoring even at high-Arctic Resolute has recorded a rising outdoor radon trend. Second, not every Nunavut home fits the low-risk profile — a home on permafrost-free ground, or one built closer to the ground, can behave differently.
The result is the framing Health Canada uses for radon everywhere: there is no level that is completely risk-free, and you cannot infer your home's level from a regional generalization. Nunavut's low measured prevalence is encouraging, but it is thin, dated, and potentially shifting — which is an argument for testing, not against it.
Is radon dangerous? The health risk in Nunavut
Radon is classified by the International Agency for Research on Cancer as a Group 1 carcinogen — the highest category, the same as tobacco smoke and asbestos. Health Canada's current figures:
- Radon is the number one cause of lung cancer in non-smokers, and the second leading cause overall after smoking.
- About 16% of lung-cancer deaths in Canada are estimated to be radon-related — more than 3,000 deaths a year (Health Canada's fact sheet cites roughly 3,200).
- Health Canada estimates that a non-smoker exposed to high radon over a lifetime has roughly a 1 in 20 chance of developing lung cancer from it; for a smoker, the combined risk rises to about 1 in 3. Radon and tobacco smoke multiply each other's risk.
There is no Nunavut-specific radon health estimate. These national figures describe the risk wherever high radon is present.
Health Canada is careful to frame the risk proportionately, and so are we: there is no level of radon that is completely risk-free, the risk below the guideline is small, and it is ultimately each homeowner's choice what level of exposure they are willing to accept. Radon exposure is long-term, not acute — there are no immediate symptoms.
The Health Canada guideline — and what your number means
Canada's guideline is 200 becquerels per cubic metre (Bq/m³), measured as an annual average in a normally occupied area of the home. It's a health-based guideline, not a hard legal limit for private homes. Health Canada's guidance:
- At or above 200 Bq/m³: take corrective action to reduce the level, within one year — and sooner the higher the result.
- Below 200 Bq/m³: no corrective action is recommended, though no level is risk-free; some households (especially where someone smokes) choose to act toward the WHO's more protective 100 Bq/m³ reference level. (See how the Health Canada, WHO, and US thresholds compare.)
Your result is a concentration, not a pass/fail — it exists on a spectrum. For a plain-language walkthrough of what different result ranges mean and what Health Canada recommends at each, see our guide on how to read your radon test results.
How to test for radon in Nunavut
Testing is the only way to know your home's level, and it's straightforward:
- Use a long-term test of at least 91 days (three months). Health Canada recommends long-term testing because radon swings day to day and season to season; a 91+ day average is what reflects your real exposure. Short-term tests and digital "screeners" can flag a possible problem but are not suitable for deciding whether to act.
- The long Arctic heating season makes testing easy to time. A test that runs through the cold months, when homes are sealed up, gives a conservative reading — but you can start any time of year.
- Place the detector in the lowest lived-in level (in a home built on piles or a slab, use the lowest occupied floor), in a room occupied more than four hours a day, about 30 cm off the floor and away from drafts, vents, and direct sun. Not the kitchen, bathroom, or laundry room.
- Use a C-NRPP-approved test. RadonTest.ca kits use an alpha-track detector analysed by a C-NRPP-certified laboratory. (For how long-term kits compare with continuous digital monitors, see our guide.)
Where to get your test: order a RadonTest.ca kit — the detector, analysis by a C-NRPP-certified laboratory (with an all-in-Canada analysis option), tracked shipping both ways, and your result delivered with clear Health Canada context are all included. Shipping to Nunavut communities can take longer, so allow extra time and start the 91-day test as soon as the kit arrives. One caution about cheaper retail kits: not every hardware-store kit is analysed by a C-NRPP-certified lab — see our comparison of hardware-store radon test kits.
When to retest. Health Canada recommends testing again after any renovation that affects your home's structure or ventilation, after energy retrofits, or after excavation near the foundation. Given the permafrost-thaw concern, a home on ground that has noticeably settled or shifted is also worth retesting. If you install a mitigation system, retest every five years to confirm it's still working. There's no blanket "every five years" rule for an unmitigated home — the trigger is change.
For more, see when is radon testing season in Canada.
If your radon is high: mitigation in Nunavut
A result above 200 Bq/m³ is a solvable problem (here's what to do if your radon is above 200 Bq/m³). Health Canada recommends hiring a C-NRPP-certified radon mitigation professional.
How it works. The standard, most effective method is active soil depressurization (ASD) — a pipe through the foundation slab and a continuously running fan that draws radon from beneath the home and vents it safely outside. In most homes this reduces radon by more than 80%, and a system can usually be installed in less than a day. The fan must run continuously; the installer should check the system doesn't cause "back-drafting" of a furnace, water heater, or fireplace; and the work should be verified with a short-term test after activation and confirmed with a long-term test the following heating season. Homes built on piles or with crawl spaces may need a different approach, such as sub-membrane depressurization — a certified mitigator will assess this.
What it costs. There is no Nunavut-specific mitigation cost figure. Nationally, industry data compiled by Take Action on Radon puts the average at about $2,700, and Health Canada's own estimate is $2,000–$3,000. In Nunavut, costs would very likely be higher: there are no resident C-NRPP-certified mitigators identified in the territory, so a professional would generally travel from southern Canada, and materials must be shipped in. Running the fan costs roughly $50–$75 a year in electricity, and the fan itself (about $200–$300) lasts 5–10+ years.
Find a certified professional. The Canadian National Radon Proficiency Program (C-NRPP) — run by the Canadian Association of Radon Scientists and Technologists with Health Canada oversight — certifies radon professionals and labs. Health Canada recommends using a C-NRPP-certified contractor. Search the directory at c-nrpp.ca/find-a-professional; for Nunavut you will likely need to arrange a professional who serves the territory from elsewhere. RadonTest.ca does not perform mitigation or recommend specific companies. See also: radon mitigation cost across Canada and how to choose a licensed radon mitigator.
Nunavut's radon rules and protections
Nunavut has essentially no radon-specific framework — consistent with its small population and the limited testing done so far.
New-home warranty
Nunavut has no mandatory new-home warranty program, and nothing covers radon. There is no Nunavut equivalent to Ontario's Tarion warranty.
The building code (new construction)
Nunavut follows the National Building Code of Canada, which includes radon-control requirements for new homes. In practice, building-code administration is concentrated where there is permit-and-inspection capacity — principally Iqaluit — and is more limited across smaller hamlets. The building code governs new construction only and does not require anything of existing homes. More detail: Canadian building codes and radon.
Programs and awareness
There is no territorial radon grant, kit program, or awareness campaign in Nunavut. A 2026 review by the Northwest Territories Legislative Assembly, which surveyed supports across Canada, recorded no territorial radon programs for Nunavut, and Take Action on Radon lists no Nunavut partner groups or data. Nunavut is, in effect, the largest radon information gap in the country.
Selling or buying a home: disclosure in Nunavut
Radon disclosure is not mandatory in Nunavut. There is no territorial property-disclosure statement with a radon line (only Nova Scotia, New Brunswick, Quebec, and British Columbia have one), and transactions are generally governed by "buyer beware" (caveat emptor), subject to the usual duty to disclose a known hidden ("latent") defect. If you've tested and know your level is high, that knowledge should be disclosed; if you're buying, make radon part of your due diligence. See radon when buying or selling a home in Canada. Renting, or renting out a property? See our guides for landlords and renters.
Radon in Nunavut workplaces
No Nunavut-specific binding radon exposure limit was identified in the territory's occupational-health regulations (administered through the Workers' Safety and Compensation Commission); general health-and-safety duties apply. Separately, federally regulated workplaces in Nunavut (banks, telecom, air and interprovincial transport, federal operations) fall under a new federal rule, SOR/2026-10, which sets a binding workplace limit of 200 Bq/m³ (replacing the old 800 Bq/m³ standard) and comes into force around early 2027.
Financial help in Nunavut
- There is no Nunavut radon grant or tax credit.
- Lungs Matter (Canadian Lung Association) offers up to $1,500 toward home radon mitigation, prioritizing people diagnosed with lung cancer and lower-income households. The program is described as national; because there is no Nunavut lung association, confirm territorial eligibility with the Canadian Lung Association.
- There is currently no open federal radon-mitigation grant for the general public. If mitigation cost is a barrier, ask whether any general Nunavut housing-assistance or home-repair program can apply — radon is rarely named explicitly, so confirm directly.
Frequently asked questions
Is radon a problem in Nunavut? No one really knows. The only home survey (78 homes, 2012) found none above the guideline, and a 2024 national study had no Nunavut data at all. Permafrost and pile construction likely keep many homes low, but the evidence is too thin to call the territory radon-free — testing your own home is the only way to know.
Why did Nunavut's survey find 0% high radon? Two reasons: the sample was tiny (78 homes, the smallest in the country), and continuous permafrost plus elevated pile construction can genuinely reduce how much radon reaches indoor air. A 0% result from such a small, dated sample means "none found in those homes," not "no risk anywhere in Nunavut."
Could climate change affect radon in Nunavut? Possibly. Permafrost can trap radon underground; as it thaws, some of that radon may be released. This is emerging science, but it's a reason not to treat Nunavut's low historic numbers as permanent.
What is a risk-free radon level in Nunavut? There is no completely risk-free level — Health Canada's guideline is 200 Bq/m³, the level above which it recommends acting within a year. The risk below the guideline is small but not zero, and the WHO references a more protective 100 Bq/m³.
Does any warranty or grant cover radon in Nunavut? No. There is no Nunavut new-home warranty covering radon and no territorial radon grant. The national Lungs Matter program may help — confirm territorial eligibility with the Canadian Lung Association.
How long does a radon test take? At least 91 days (three months) for a valid long-term result. Allow extra time for shipping to Nunavut, and start the test as soon as the kit arrives.
Test your Nunavut home
Nunavut is the least-tested part of Canada for radon — which means your home's own long-term test is the only information you can actually rely on. It's invisible, it's measurable, and if it's ever high, it's fixable.
Order your RadonTest.ca kit → — lab analysis by a C-NRPP-certified laboratory (with an all-in-Canada analysis option), tracked shipping both ways, and your result delivered with clear Health Canada context.
Sources
- Health Canada — Radon guideline (corrective action within 1 year), modified 2025-09-24. https://radontest.ca/links/hc-guideline
- Health Canada — Radon: What you need to know ("1 in 5 homes," 16% of lung cancers, ~3,200 deaths), 2025 edition. https://radontest.ca/links/hc-what-you-need-to-know
- Health Canada — Cross-Canada Survey of Radon Concentrations in Homes, Final Report (Nunavut 0%, n=78; lowest with PEI), 2012. https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/radiation/cross-canada-survey-radon-concentrations-homes-final-report-health-canada-2012.html
- Evict Radon National Study / University of Calgary — 2024 Cross-Canada Survey of Radon (no Nunavut data; flagged as a gap). https://crosscanadaradon.ca/survey/
- National Collaborating Centre for Environmental Health — Climate change, the Arctic, and radon gas: a rising threat from the ground (permafrost cap; thaw-driven radon release), 2022. https://ncceh.ca/resources/blog/climate-change-arctic-and-radon-gas-rising-threat-ground
- NWT Legislative Assembly — Jurisdictional Scan of Public Radon Testing and Mitigation Supports in Canada (no territorial radon programs), tabled 2026. https://www.ntlegislativeassembly.ca/sites/default/files/tabled-documents/2026-02/TD%20443-20(1)%20Radon.pdf
- Health Canada — Reducing radon levels in your home (>80% reduction; C-NRPP), modified 2025-10-09. https://radontest.ca/links/hc-mitigation-guide
- Health Canada — Guide for radon measurements in homes (91-day test; retest triggers; 5-year retest for mitigated homes), modified 2025-12-22. https://radontest.ca/links/hc-measurements-guide
- Health Canada — Radon Reduction Guide for Canadians (ASD mechanism; back-draft; operating cost), modified 2025-09-24. https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/radiation/radon-reduction-guide-canadians-health-canada.html
- Take Action on Radon — Reducing radon (cost data; ASD explainer); Nunavut program page (no Nunavut groups/data). https://takeactiononradon.ca/protect/reducing-radon/ and https://takeactiononradon.ca/provinces/nunavut/
- Canada Gazette Part II — SOR/2026-10 (federal workplace 200 Bq/m³, in force ~early 2027), 2026-02-11. https://gazette.gc.ca/rp-pr/p2/2026/2026-02-11/html/sor-dors10-eng.html
Lab analysis is performed independently by a C-NRPP-certified laboratory. Results are reported against the Health Canada guideline of 200 Bq/m³. RadonTest.ca coordinates kit logistics and sample submission only — it does not interpret or modify lab results and does not provide medical, legal, or warranty advice. Information attributed to Health Canada, the Government of Nunavut, and others is summarized from the public sources listed above; confirm time-sensitive details (building-code requirements, program availability, workplace rules) with the responsible body.