Radon in Winnipeg (2026): What the Data Shows, Why It's High, and What Winnipeg Homeowners Should Do

Flat-vector map of Canada with a coral red pin marking Winnipeg, Manitoba, alongside a circular badge showing 19% — Manitoba's provincial share of homes above the Health Canada radon guideline

A note before you read. This article is general health and home-testing information for Winnipeg homeowners, drawn from Health Canada, the Province of Manitoba, the Lung Association of Manitoba, Manitoba Hydro, and the Canadian Cancer Society. It is not medical advice. See full disclaimers at the bottom.

If you live in Winnipeg and you've heard radon is a serious problem here, the data isn't subtle. Manitoba has among the highest provincial radon rates in Canada per Health Canada's published data, the City of Winnipeg has been singled out as a Canadian "hot spot," and the surrounding rural and small-community testing has found pockets where the majority of homes exceed the Health Canada guideline. Health Canada's own 2012 Cross-Canada Survey found roughly 19% of Manitoba homes above the 200 Bq/m³ guideline — nearly three times the national average from the same survey.

The good news: Manitoba is also the only Canadian province with a utility-backed financing program specifically designed to spread radon mitigation costs over time. Manitoba Hydro's Energy Finance Plan lets eligible Manitoba Hydro residential customers borrow up to $5,000 at 6.75% over 5 years for radon mitigation work performed by a C-NRPP-certified contractor — paid back through their existing utility bill. That financing path doesn't exist in most of Canada.

This guide walks through the Manitoba and Winnipeg data, explains why Winnipeg residential radon is so high, lays out the practical step-by-step from "I want to know" to "result in hand," and details the Manitoba Hydro financing program along with other local resources.

TL;DR for Winnipeg homeowners

  • About 19% of Manitoba homes test above the Health Canada 200 Bq/m³ guideline per Health Canada's 2012 Cross-Canada Survey — among the highest provincial rates in Canada and significantly above the ~7% national average from the same survey.
  • Some Manitoba regions test much higher — Health Canada documented health regions with 23–44% of homes above guideline, including five in Manitoba; subsequent community-level testing has found pockets above 90%.
  • Winnipeg specifically is documented as a Canadian radon hot spot, with multiple sources estimating up to 30% of Winnipeg homes have elevated radon levels.
  • The only way to know your home's level is to test it. Long-term test, 91+ days, ideally during the heating season. Order a $89 long-term radon test kit →
  • Manitoba Hydro Energy Finance Plan offers up to $5,000 in on-bill financing for radon mitigation by a C-NRPP-certified contractor — a Manitoba-specific advantage no other province offers.

Table of contents

  1. What the published Manitoba radon data actually shows
  2. Why Winnipeg radon is so high — geology, climate, and construction
  3. What to do as a Winnipeg homeowner
  4. Manitoba Hydro Energy Finance Plan — the Manitoba advantage
  5. Local Winnipeg and Manitoba resources
  6. FAQ — Winnipeg-specific questions
  7. Disclaimers
  8. Sources

What the published Manitoba radon data actually shows

Health Canada's 2012 Cross-Canada Survey of Radon Concentrations in Homes is the foundational national dataset, and Manitoba's results stand out:

  • About 19% of Manitoba homes tested above the 200 Bq/m³ guideline — one of the highest provincial rates in Canada, alongside Saskatchewan, New Brunswick, and the Yukon.
  • Compared to a national average of about 7% in the same survey, Manitoba's rate is nearly three times the Canadian average.
  • Among the 14 Health Regions nationally with the highest radon rates (23–44% of homes above guideline), five were in Manitoba — more than any other single province.
  • Subsequent community-level testing in Manitoba has found pockets where over 90% of homes tested exceeded the Health Canada guideline.

Source: Health Canada — Cross-Canada Survey of Radon Concentrations in Homes (2012)

For Winnipeg specifically, multiple Canadian press and public-health sources document the city as a national hot spot, with estimates that up to 30% of Winnipeg homes have radon levels at or above the guideline. A 2014 CBC News investigation labeled Manitoba "a hotspot for radon levels among Canadian homes" — and the data has only become more concerning in the years since, as more recent provincial and academic testing finds higher rates than the original 2012 survey.

The takeaway isn't that every Winnipeg home has a problem — about 70% of Winnipeg homes likely test below the guideline. The takeaway is that roughly three out of every ten Winnipeg homes have radon levels Health Canada considers worth acting on, levels vary substantially even between adjacent homes, and the only way to know your specific home's level is a long-term radon test.

Order a $89 long-term radon test kit →

Why Winnipeg radon is so high — geology, climate, and construction

Three independent factors stack to produce Winnipeg's elevated residential radon:

1. Geology. Winnipeg sits at the eastern edge of the Canadian Prairies, in the Red River basin, on the Precambrian Canadian Shield bedrock that extends north and east from the city. The Shield contains varying levels of uranium-bearing rock, and surface glacial till deposits across southern Manitoba carry radon source material. Many parts of southern and eastern Manitoba — including the Whiteshell, Interlake, and parts of southeastern Manitoba — sit on geology that produces meaningfully higher radon than the Canadian average.

2. Climate. Winnipeg has one of the longest and coldest heating seasons of any major Canadian city — typically late September through early May. During those months, homes are sealed against –30°C and –40°C extremes, furnaces and HVAC systems run continuously, and the natural "stack effect" (warm air rising through the home creating negative pressure at the lowest level) actively pulls soil gas into basements. Outdoor air dilution that would lower indoor radon during summer is essentially absent for 7+ months. Manitobans also tend to spend more time indoors during the long heating season, concentrating exposure on the highest-radon period.

3. Building construction. Winnipeg's housing stock is dominated by full-basement single-family homes, often with finished basement living areas (rec rooms, home offices, basement bedrooms, suites). Larger floor plates, more soil-contact area, finished basement living spaces, and modern energy-efficient (tighter) building envelopes all tend to increase indoor radon concentrations — even when each individual choice (energy efficiency, finished basements, larger homes) is otherwise desirable.

The combination — Shield-and-prairie geology + an exceptionally long heating season + finished-basement housing stock — is why Manitoba and Winnipeg consistently rank among the highest-radon major Canadian markets.

What to do as a Winnipeg homeowner

The action item is straightforward, and Manitoba is one of the best provinces in which to take it because of the Manitoba Hydro financing program (next section). Here's the step-by-step:

Step 1: Test (long-term, 91+ days). Health Canada's recommended test for a homeowner mitigation decision is a long-term alpha-track lab test, deployed for at least 91 days during the heating season (October–April in Winnipeg), in the lowest lived-in level of your home. The test costs $89 all-in with RadonTest.ca — kit, tracked outbound, prepaid tracked Canada Post return label, and analysis at Lex Scientific in Guelph, Ontario (a C-NRPP-listed Canadian lab).

Step 2: Read your result. Below 200 Bq/m³, no mitigation is required (Health Canada recommends retesting every 5 years). Above 200 Bq/m³, mitigation is recommended. See our How to Read Your Radon Test Results and What to Do If Your Radon Level Is Above 200 Bq/m³ guides for the post-result decision tree.

Step 3: Mitigate, if needed. A C-NRPP-certified mitigation contractor installs a sub-slab depressurization system at a typical Manitoba cost of $2,500–$4,500. These systems typically reduce radon by up to 95% (Health Canada cites reductions of more than 80%; CARST cites up to 95%). Find a Winnipeg-area C-NRPP-certified mitigator via the C-NRPP Find a Professional tool.

Step 4: Apply for Manitoba Hydro on-bill financing OR the Lungs Matter grant (see next section).

Step 5: Verify. Once mitigation is complete, run an independent post-mitigation test — ideally from a provider not affiliated with the mitigation company — to confirm levels are below 200 Bq/m³ and stay that way.

Order your Winnipeg kit — $89 →

Manitoba Hydro Energy Finance Plan — the Manitoba advantage

This is the single biggest reason Manitoba is one of the best provinces to mitigate radon if you find you need to. Manitoba Hydro's Energy Finance Plan is an on-bill financing program available to Manitoba Hydro residential, small commercial, farm, and seasonal customers that explicitly includes radon mitigation as an eligible upgrade.

Key terms (verify current details at hydro.mb.ca):

  • Loan amount: $500 minimum, up to $5,000 maximum
  • Interest rate: 6.75% (as published; verify current rate)
  • Term: up to 5 years
  • No down payment required
  • Repayment: monthly payments added to your existing Manitoba Hydro bill
  • Eligibility: Manitoba Hydro customer with approved credit
  • Contractor requirement: mitigation must be performed by a C-NRPP-certified contractor

Why this matters: the typical Manitoba radon mitigation cost ($2,500–$4,500) fits comfortably inside the $5,000 financing cap. For a Winnipeg homeowner who tests above guideline, the practical reality changes from "I need to find $3,500 right now" to "I can spread $3,500 over 60 monthly bill add-ons of about $69." That structural difference is why Manitoba has higher mitigation completion rates than provinces without similar programs.

Verify before relying on the program. Manitoba Hydro updates its loan terms periodically. Always confirm the current loan amount, interest rate, term, and eligibility requirements directly at hydro.mb.ca/account/loans/energy-finance-plan before counting on the program for your mitigation budget.

National option as alternative or supplement: the Canadian Lung Association's Lungs Matter program offers up to $1,500 toward mitigation for eligible Canadian homeowners. Manitoba homeowners can potentially explore both options — verify with each program.

Order your $89 long-term test kit →

Local Winnipeg and Manitoba resources

Note on Manitoba real estate disclosure. Manitoba uses a standard provincial Property Disclosure Statement framework. The latent-defect doctrine applies under common-law principles, and a known elevated radon reading is generally treated as a material defect requiring disclosure. See our Real Estate Radon Guide for the buyer/seller/realtor/lawyer playbooks across Canadian provinces, and consult a Manitoba real estate lawyer for any specific transaction.

Note on Manitoba building code. Manitoba uses the National Building Code 2020, which requires a Level 1 radon "rough-in" (capped vent pipe through the slab + soil gas barrier + sealed perimeter) in new construction. The rough-in is infrastructure that makes future mitigation easier and cheaper — it does not actively reduce radon. See our Canadian Building Codes and Radon guide for the full picture.

FAQ — Winnipeg-specific questions

How common is high radon in Winnipeg? Multiple sources estimate that up to 30% of Winnipeg homes have radon levels at or above the Health Canada 200 Bq/m³ guideline, and Health Canada's 2012 Cross-Canada Survey put Manitoba's provincial rate at about 19% — one of the highest in Canada and roughly three times the national average. The only way to know your specific home's level is to test it.

Why is Winnipeg so much higher than other Canadian cities? Three factors combine: Canadian Shield and prairie geology (the natural source of radon), an exceptionally long heating season (October–April) that seals homes for most of the year, and full-basement housing stock with finished basement living spaces. See the "why" section above.

Are some Winnipeg neighbourhoods worse than others? Radon levels vary substantially even between adjacent homes, and Manitoba's documented hot spots include both urban and rural areas. Neighbourhood-level statistics don't reliably substitute for a home-specific test — the only way to know your specific home's level is to test it.

Does my newer Winnipeg home have a radon rough-in? If your home was built under the National Building Code 2020 (or earlier Manitoba adoption of the 2010 NBC radon provisions), it should have a capped vent pipe stub through the basement slab. The rough-in is infrastructure for future mitigation, not active reduction. If a long-term test shows elevated radon, the rough-in makes the mitigation system easier and cheaper to activate. (Canadian Building Codes guide)

How much does radon mitigation cost in Winnipeg? Typical Manitoba residential mitigation costs are $2,500–$4,500 for a sub-slab depressurization system installed by a C-NRPP-certified contractor. Complex homes can run higher. Manitoba is unique in offering up to $5,000 in on-bill financing through the Manitoba Hydro Energy Finance Plan — see the Manitoba Hydro section above. The Canadian Lung Association's Lungs Matter program may also offer up to $1,500 toward mitigation.

Can I really put my radon mitigation on my Manitoba Hydro bill? Yes — that's exactly how the Energy Finance Plan works. Eligible Manitoba Hydro customers can finance up to $5,000 of qualifying upgrades (including radon mitigation by a C-NRPP-certified contractor) at 6.75% over up to 5 years, repaid through monthly additions to the existing Hydro bill. Verify current loan terms directly at hydro.mb.ca before relying on these figures.

Where can I buy a long-term radon test kit in Winnipeg? You can order a RadonTest.ca $89 all-in long-term kit online and receive it within a few business days anywhere in the Winnipeg area — kit + tracked outbound + prepaid tracked Canada Post return label + analysis at a C-NRPP-listed Canadian lab. The Lung Association of Manitoba also offers an at-cost kit through homeradontest.ca/partner/mblung.

Do I have to disclose elevated radon when I sell my Winnipeg home? Manitoba uses a standard provincial Property Disclosure Statement, and the common-law latent-defect doctrine applies. A known elevated radon reading (above the Health Canada guideline) is generally treated as a material defect requiring disclosure. See our full Real Estate Radon Guide for the cross-provincial framework, and consult a Manitoba real estate lawyer for any specific transaction.

When is the best time of year to test in Winnipeg? The heating season — October through April — produces the highest indoor radon levels and is the recommended testing window per Health Canada. A long-term test (91+ days) started in early October gives you a strong heating-season reading that captures Winnipeg's worst-case exposure window.

Where can I find a C-NRPP-certified radon mitigator in Winnipeg? The C-NRPP Find a Certified Professional directory lists certified measurement and mitigation professionals by area. Winnipeg has a substantial certified-mitigator population given the province's long-standing radon awareness.

Test your Winnipeg home — $89, all in

Manitoba has among the highest residential radon rates in Canada, Winnipeg is documented as a national hot spot, and the data backs you up if you've been wondering whether testing is worth it. The good news: it's not just about whether to test — Manitoba is also one of the easiest provinces in which to act on a high result, thanks to the Manitoba Hydro Energy Finance Plan.

RadonTest.ca — $89 all-in (plus applicable tax). Long-term 91-day alpha-track test kit. C-NRPP-listed device. Analysed at Lex Scientific in Guelph, Ontario — Canadian lab, C-NRPP listed, ISO/IEC 17025 accredited by CALA. Tracked Canadian shipping both ways. Written lab report PDF delivered to your inbox. If your result is above 200 Bq/m³, the Manitoba Hydro Energy Finance Plan can cover the mitigation cost on your existing utility bill.

Order — $89 →

Important disclaimers

Not medical, legal, or financial advice. This article provides general health and home-testing information for Winnipeg homeowners drawn from publicly available Health Canada, Province of Manitoba, Lung Association of Manitoba, Manitoba Hydro, and Canadian Cancer Society materials. It is not medical advice, legal advice, or financial advice. Consult a qualified professional for specific decisions.

Statistics and citations. The 19% Manitoba figure and the 14-Health-Region figure are from Health Canada's 2012 Cross-Canada Survey of Radon Concentrations in Homes. The "up to 30% of Winnipeg homes" estimate reflects multiple subsequent provincial and academic data sources and Canadian press coverage; specific neighbourhood-level rates vary. National figures are taken from Health Canada's Radon: What You Need to Know fact sheet (2025). Health Canada updates its published figures periodically; figures cited reflect the source as of May 2026.

Local Winnipeg / Manitoba data. Statements about Winnipeg radon levels reflect the published Health Canada survey, provincial public health publications, and Canadian press coverage. Radon levels vary substantially even between adjacent homes; community-level statistics do not substitute for a home-specific long-term test.

Mitigation cost. The $2,500–$4,500 mitigation cost range is a typical Manitoba residential figure. Actual costs vary by home, foundation, complexity, and contractor.

Manitoba Hydro Energy Finance Plan. Specific terms (loan amount, interest rate, term, eligibility, contractor requirements) of the Manitoba Hydro Energy Finance Plan are subject to change. Verify current program details and eligibility directly at hydro.mb.ca before relying on the program for your mitigation budget. RadonTest.ca is not affiliated with Manitoba Hydro and does not administer the program.

Lungs Matter grant. Eligibility, grant amounts, and program availability for the Canadian Lung Association's Lungs Matter program may change. Verify directly at lung.ca before relying on the program.

Real estate disclosure. Statements about Manitoba real estate disclosure reflect the general latent-defect framework under common-law principles. Specific disclosure obligations for any individual transaction depend on the facts; consult a Manitoba real estate lawyer for advice on a specific deal.

No diagnosis or treatment claims. RadonTest.ca sells radon test kits. We do not diagnose, treat, or prevent disease, and we make no claims about doing so.

No warranty as to completeness. RadonTest.ca makes no warranty as to the completeness or accuracy of the information herein and accepts no liability for decisions made in reliance on this article.

Sources & further reading

Manitoba- and Winnipeg-specific

Health Canada / national

National associations and grants

Related RadonTest.ca articles