Radon testing and mitigation in Chestermere

Is there a published radon figure for Chestermere?

No. We have not found a study or survey that reports a radon result for Chestermere by itself. The 2017 southern Alberta study took its 364 homes outside Calgary from areas that included Chestermere, and it reports no separate result for the citysource. Chestermere houses were measured, in other words, and their readings went into a wider total that cannot be pulled apart again.

We would sooner state that gap than cover it. Figures do exist for a few other towns in the region, and not one of them stands in for this city. A number lifted from another municipality would look precise and tell a Chestermere owner nothing about the house they live in. The same holds inside the city. No radon data is published for Westmere, Rainbow Falls, Kinniburgh, Dawson's Landing, Chelsea, West Creek, Lakepointe, The Cove or Waterford, so this page ranks none of them against the others.

Which numbers can honestly be applied to a Chestermere home?

Only regional ones, read as background and never as a forecast for one address. In the Cross-Canada Survey of Radon Exposure, about 1 in 6 houses across the Calgary area measured at or above 200 Bq/m³source. For Alberta as a whole, that survey's weighted estimate is also about 1 in 6 residential buildings at or above the same marksource. Neither figure is a Chestermere measurement, and we do not present either as one.

The mark those surveys count against is the national guideline. The Canadian guideline is 200 Bq/m³ of indoor air, taken as an annual average, and Health Canada recommends corrective action above itsource. Regional odds of this size are enough to justify a test and too coarse to replace one. Health Canada's advice is that every home be tested, wherever it stands and whatever kind of building it issource. The studies behind the regional figures are laid out, with their limits, on our page about radon maps and survey data for the Calgary region.

Does a newer Chestermere house still need a radon test?

Yes, and in this city that covers most houses. Chestermere is a lake city east of Calgary that has grown quickly. It counted 22,163 residents in the 2021 federal census and 32,255 in the city's own 2025 censussource. About 80% of its dwellings in the 2021 census were built in 2001 or later, about 34% between 2011 and 2021, and only about 6% before 1991source.

A recent build is sometimes taken as a sign that radon is not a concern. The regional research points the other way. The 2017 study of southern Alberta homes found those built in 1992 or later averaging 142 Bq/m³ against 108 Bq/m³ for older houses, a difference of 31.5%source. A 2019 study of 11,727 Prairie buildings linked higher radon with more recent construction, along with larger floor area, fewer storeys, higher ceilings and less window openingsource. A 2021 study put Canadian houses built in the 2010s and 2020s at an average of 131 Bq/m³, against 28 Bq/m³ for Swedish houses of the same yearssource.

None of those papers reports a Chestermere result, and none of them can say what your house will read. What they do establish is a pattern across the region and the country: newer construction has tended to test higher, not lower. For a city built mostly in this century, that makes the age of the house a reason to test and never a reason to skip it.

The type of building does not change the advice. About 80% of Chestermere's dwellings in the 2021 census were single-detached housessource, and row houses and semi-detached homes are part of the mix as well. A unit that shares a wall still sits on its own patch of ground and needs its own measurement, as described on our page about radon in townhomes and other attached homes.

Which Chestermere homes have a radon rough-in?

That depends on when the building permit was applied for, not on the year the house was finished. Homes whose building permits were applied for before November 1, 2015 generally were not required to have a radon rough-insource. A house completed after that date could still have been built under the earlier code if its application went in before it.

The census gives one rough indication of scale. About 12% of Chestermere's dwellings in the 2021 census had been built between 2016 and 2021source. Census construction periods do not follow permit dates, so that share is a guide and not a list of addresses. Homes finished since that census are not in the count either, and we do not estimate what share of today's Chestermere houses has the pipe. The way to find out is to look.

Under the current Alberta edition of the building code, new homes get the rough-in for a radon extraction system: a capped, labelled pipe through the floor that opens into granular material beneath itsource. If you find a capped and labelled stub rising from the lowest floor of the house, that is probably it. On its own, a rough-in changes nothing in the air you breathe indoors. It has no fan, it moves no air, and it lowers nothing until a test shows a need and the pipe is completed. What that work involves is covered under activating a radon rough-in that the builder left capped.

Does Chestermere Lake raise radon in the houses around it?

Nobody has shown that it does, and nobody has shown that it does not. The lake is an irrigation reservoir that stores Bow River water, and the city's development plan describes the lakefront as its oldest residential areasource. No published study links the lake, the canal or the water table to radon indoors. We have looked, and we will not fill that silence with a theory.

What is documented applies to every street in the city, waterfront or not. Radon differs from one house to the next, even between similar houses that stand side by side, and testing is the only way to be sure of a home's levelsource. A house on the shore and a house well back from it are in the same position until each has been measured. The lakefront being the oldest part of Chestermere does not settle the question either, because age works as a clue in neither direction for a single building.

Is the water supply part of the radon question in Chestermere?

For homes on city water, no. Chestermere receives treated drinking water from the City of Calgary, and its development plan notes that the North Acreages, the East Acreages and Paradise Meadows are not serviced with municipal watersource. Health Canada notes that radon escapes from municipally treated water before it reaches the distribution system, and it sets no maximum acceptable concentration for radon in drinking watersource. In a serviced Chestermere home, the thing to measure is the air.

Those three unserviced areas are where the research on rural properties becomes relevant. A 2024 study of 42,051 Canadian residential properties found average radon as much as 31.2% greater in rural, lower population density communities than in urban equivalentssource. Its authors attributed a majority of that difference to proximity to drilled groundwater wells, and not to using water from themsource. The Cross-Canada survey reports about 1 in 4 rural properties in the Prairies and Northwest Territories at or above 200 Bq/m³, against about 1 in 6 urban onessource.

Two cautions belong beside those numbers. They are national and Prairie figures, not measurements from the North Acreages, the East Acreages or Paradise Meadows. And the finding concerns a drilled well standing near the house, which is a reason to test the indoor air and says nothing against the water in the glass. Our page on radon on acreages and rural properties goes further into that research.

How is a long-term radon test done in a Chestermere home?

A small detector is left in the house for at least three months of ordinary living, then read by a laboratory. Health Canada recommends measuring for three to twelve months, with 91 days as the minimumsource. At least 91 days of the test should fall in the heating season, when windows stay closed and indoor radon tends to be highestsource. The detector belongs in a regularly occupied room on the lowest lived-in level, about 30 cm or more from the floor and away from walls, kitchens, bathrooms, laundry rooms, vents, heat sources, direct sun and electronicssource.

Tests in Chestermere are placed by Plinio Neto, who personally holds the C-NRPP Radon Measurement Professional certification (CRT-202965). His name can be looked up in the public C-NRPP list of certified individuals. The household does nothing special while the detector is out. Heat the house, air it and use it the way you always do, because the aim is to record the home as it is lived in.

The choice between test types is explained on our radon testing page, and the full procedure is set out under long-term radon testing from placement to laboratory report.

What happens if a Chestermere result comes back above the guideline?

Then the house is a candidate for a mitigation system, and there is time to plan it properly. Above 200 Bq/m³, Health Canada recommends mitigating within one year, and sooner the higher the level, with the aim of reducing radon as low as reasonably achievablesource. That recommendation to act applies above the guideline. Below it the decision belongs to the owner, and no level of radon is considered risk-free, so a lower reading is always the better one.

Sub-slab depressurization is the most common and effective method, while added ventilation and sealing of entry routes have limited effect on their ownsource. Our standard layout puts the fan on the pipe inside the basement and sends the exhaust out through the rim joist. In some layouts the exhaust goes above the roof instead. Running the pipe up an exterior wall is not part of how we build these systems. Both outlets are recognized by the Canadian mitigation standard, which permits discharge above the roof or through a side wall near ground level and says the side-wall option shall be favoured in cold weather areassource.

Installations are done by Plinio Neto, whose C-NRPP Radon Mitigation Professional certification (CRMT-202966) is his own and not a company badge. Choosing someone certified by the Canadian National Radon Proficiency Program is what Health Canada recommends to homeownerssource. Health Canada says a radon reduction system can usually be installed in less than a day and, in most homes, reduces radon by more than 80%source. That is a typical outcome across many houses. It is not a promise about yours, and nobody can name a final reading before the fan is running.

The result is checked twice. Once the fan has run for a while, the installer takes a short verification reading to see that levels are moving the right way. The confirmation that counts is a long-term test with a kit from an independent laboratory, which the Chestermere homeowner sets out and mails without us handling it. Health Canada recommends testing again after a system is installed, every five years while it stays active, and after any renovation that affects the structure or ventilation of the homesource. System design in general is described on our main page on radon mitigation systems.

What does radon work cost in Chestermere, and how is it arranged?

The cost depends on what the test shows and on what the house already has, and it is quoted for the specific home. A house with a usable rough-in generally needs less new work than one where a suction point has to be made from scratch, which is why we look at the house before pricing it.

What moves a quote up or down is set out item by item in the guide to radon mitigation costs. To start, send the form on this page with your Chestermere neighbourhood and the year the house was built, if you know it. Mention whether you have seen a capped pipe in the floor, and whether the property is in one of the unserviced acreage areas. Chestermere is one of the communities listed on the page showing where we test and install, and we reply by email.