Best Radon Testing & Mitigation in Saint John

About Radon in Saint John, New Brunswick

Last updated: March 2026

Saint John is served by C-NRPP certified radon professionals listed on RadonFinder.ca. New Brunswick has moderate to elevated radon risk, with the highest levels concentrated in areas underlain by uranium-bearing geological formations, particularly around Sussex, the Saint John River valley, and parts of the Fredericton region. The province's mix of older housing stock and varied geology means test results can differ significantly from one neighbourhood to the next. The 2024 Cross-Canada survey found about 27% of New Brunswick homes exceed the guideline, and testing is recommended across the province.

Typical Mitigation Cost in New Brunswick

$2,000–$3,500

Near national average

Market is smaller than central Canada; some rural areas may see higher costs due to limited contractor availability.

•Foundation type: many older NB homes have stone or block foundations
•Urban (Moncton, Fredericton, Saint John) vs. rural contractor availability
•Sub-slab conditions and required number of suction points
•Basement finish level
•Crawlspace vs. basement construction type

Showing 1–4 of 4 professionals in Saint John

Calvin Consulting Group Ltd.

Saint John, NB

Calvin Consulting Group Ltd. is a C-NRPP certified radon testing professional serving Saint John, NB and surrounding areas. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(506) 343-6217Call View Profile

East Coast Home Inspection Ltd.

Hampton, NB

Offers CNRPP certified radon services. Serves Saint John, Quispamsis, Rothesay, Hampton, and other communities in Southern New Brunswick.

Testing

(506) 651-9461Call View Profile

Hive Engineering

Mebertou, NS

Hive Engineering is a C-NRPP certified radon testing professional serving Mebertou, NS and across NS. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(782) 503-0937Call View Profile

Calvin Consulting

Calgary, AB

Calvin Consulting is a C-NRPP certified radon testing professional serving Calgary, AB and surrounding areas. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(403) 547-7557Call View Profile

Local radon data

How common is high radon in Saint John?

Moderate

1 in 5.6

homes tested in the Saint John area had radon above Health Canada's action level of 200 Bq/m³. Your home can be very different from its neighbours, so the only way to know your level is to test.

Saint John

1 in 5.6

New Brunswick

1 in 3.7

Canada

1 in 5.6

Postal areas nearby with the highest estimates

226 homes tested in the 2024 Cross-Canada survey. Source: the RadonFinder.ca radon map of Canada, built on the 2024 Cross-Canada survey, Health Canada data and Statistics Canada census data.

Open Saint John on the radon map

Test before you call a pro

Know your radon level in Saint John first

A home monitor tells you whether you need mitigation at all, and later confirms it worked. Health Canada bases decisions on a 3-month average, ideally through winter.

Best Overall

Airthings Corentium Home

~$170–190 CAD C-NRPP tested

View on Amazon.ca

Newest Model

Airthings Corentium Home 2

~$230–250 CAD

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Frequently Asked Questions: Radon in Saint John

RadonFinder.ca lists C-NRPP certified radon testing and mitigation professionals serving Saint John, New Brunswick. Browse the directory above to compare professionals by services offered, certifications, and reviews.

Most homeowners in New Brunswick pay between $2,000 and $3,500 for a complete radon mitigation system. Actual cost depends on your foundation type, home size, and the complexity of the installation. Request quotes from multiple professionals to compare.

Saint John follows Health Canada's national guideline of 200 Bq/m³. If your home tests above this level, Health Canada recommends taking action to reduce radon within two years for levels between 200 and 600 Bq/m³, and within one year if above 600 Bq/m³.

Yes. Health Canada recommends testing every home in Canada, regardless of age, construction type, or location. Radon levels vary from house to house and even neighbouring homes can have very different readings. A long-term test of at least 91 days during the heating season is the most reliable method.

The most common system is active sub-slab depressurization (ASD). A certified professional installs a pipe through your foundation slab connected to a fan that draws radon from beneath the home and vents it safely above the roofline. Installation typically takes one day.