Radon Test Before Buying a House in Manitoba or Saskatchewan

A radon test before buying a house sounds simple until you look at the calendar. Health Canada's guideline is 200 Bq/m3 (becquerels per cubic metre, a measure of radioactivity in the air), and it applies to the average level over a year. The shortest test Health Canada accepts for comparing a home against it runs 91 days. If your closing is 30 days out, that test does not fit.

So the realistic plan has two parts. During the sale, a short-term screening test or a continuous digital monitor gives you a rough read, and C-NRPP (the Canadian National Radon Proficiency Program) says a short-term screening "could be conducted to provide some insight". After possession you run a long-term test and base any decision on that number. Call (204) 555-0173 and we'll put you in touch with an independent C-NRPP certified measurement professional who works in Winnipeg, Regina, Saskatoon or the towns around them.

Health Canada recommends a long-term test of at least 3 months, with a minimum of 91 days in the heating season. The reason is that the 200 Bq/m3 guideline is an annual average, and a few days of data can land well above or below it. Health Canada is blunt about it: "short-term measurements are not appropriate for informing mitigation decisions."

That leaves buyers with a gap. Most purchase timelines are measured in weeks, and you can't leave a detector in someone else's basement for three months. A short-term screen is the tool that fits the window, as long as everyone understands it is a first look and not the final answer.

Is it worth doing at all? Radon is common here. In the 2024 Cross-Canada survey, roughly 1 in 3 of the tested homes in Saskatchewan and Manitoba were at or above 200 Bq/m3; that figure is unweighted, and Health Canada says no area of Canada is radon-free. A screen during the sale won't settle the question, but it can tell you whether to expect a mitigation bill.

There are three classes of equipment you'll run into during a sale. Each has a job, and each can go wrong in predictable ways.

• Short-term professional screening: quick, done while the deal is conditional, useful as a flag. Not a basis for a mitigation decision.
• Continuous digital monitors: log readings over time. Library loaners fall here; Winnipeg Public Library lends them at every branch from 1 November to 30 April on a three-week loan, and CBC reported that each monitor should sit in the lowest level for at least seven days. You'd need the seller's permission to set one up in their house.
• Passive long-term kits: placed for 91 days or more, then mailed to a lab. Kits sold through HomeRadonTest.ca are analysed by the Saskatchewan Research Council lab. This is the test that counts, and it belongs after possession.

The common failure modes are placement ones. A detector sitting next to the sump, a floor vent or an open window, or placed in a crawl space, furnace room or unfinished storage area, is not measuring the air your family will breathe. A device that got moved or unplugged partway through is another. Ask whoever runs the test where they put it and why.

We could not find any Manitoba or Saskatchewan rule that requires radon testing or radon disclosure when a house is sold. In Saskatchewan, a property condition disclosure statement is not required for a sale, but sellers must tell buyers about defects they know of that a reasonable inspection wouldn't find. In Manitoba, the Property Disclosure Statement is Appendix A to the residential offer to purchase; whether it asks about radon is something your realtor can confirm.

Health Canada says real estate licensees have professional duties that include disclosing radon as a known latent defect. If a seller has a test result, it's fair to ask for it.

How you handle radon in the deal is a legal and negotiating question, and this page is not legal advice. Things worth raising with your realtor or lawyer:

• A condition that lets you run a short-term screen before the offer goes firm.
• A holdback of part of the price until a long-term result comes in after closing.
• Using a written quote from a C-NRPP certified mitigation professional as the basis for a price conversation.
• Whether the seller's existing test result or system paperwork forms part of the sale.

Start a long-term test once you move in, ideally before the heating season so you get the full 91 days of it. Place it in the lowest level you actually live in. If you finish the basement later and it becomes the lowest lived-in level, Health Canada says to test again. The Manitoba government puts kit prices at "between $50 and $100".

Health Canada lists radon as the leading cause of lung cancer in non-smokers and the second leading cause overall. That's the reason to test, not a reason to panic. If your result is over 200 Bq/m3, Health Canada recommends fixing it within 1 year, usually with sub-slab depressurization installed by a C-NRPP certified mitigation professional. The 200 figure is a guideline, not a legal limit, and no province requires a homeowner to act on it.

On cost, Winnipeg installers advertise systems from about $1,500 to $3,000; a Regina installer quotes $2,500 to $3,500. The mitigation cost page breaks those down. In Manitoba, the Manitoba Hydro Home Energy Efficiency Loan covers radon mitigation up to $5,000, and the Lungs Matter program offers up to $1,500 to low- or moderate-income households. In Saskatchewan, Lung Saskatchewan has offered reimbursement in the past; check its site for the current status.