Best Radon Testing & Mitigation in Waterloo

About Radon in Waterloo, Ontario

Last updated: March 2026

Waterloo is served by C-NRPP certified radon professionals listed on RadonFinder.ca. Ontario has widely varying radon risk depending on geography. The Ottawa Valley, eastern Ontario, and areas underlain by the Canadian Shield, including parts of Sudbury, Elliot Lake, and the Bancroft region, have elevated radon due to uranium-rich granite bedrock. Southern Ontario's clay and limestone geology generally produces lower levels, though local hotspots exist in any region. The 2024 Cross-Canada survey found about 13% of Ontario homes exceed the guideline.

Typical Mitigation Cost in Ontario

$2,200–$3,800

Near national average

Costs vary significantly between the GTA, Ottawa, and northern Ontario due to labour markets and home construction types.

•Foundation type: poured concrete, block, or slab
•Basement finish level: unfinished installs are faster and cheaper
•Pipe routing complexity in finished or split-level homes
•GTA vs. rural Ontario labour rate differences
•Age of home: older homes may require additional sealing work

Showing 1–16 of 18 professionals in Waterloo

Radon Gas Guys

Waterloo, ON

Provides C-NRPP certified radon testing, mitigation, and removal services with a 100% guarantee for homes in Kitchener, Waterloo, Guelph, Hamilton, and Burlington. Offers free 91-day test kits.

TestingMitigation

(519) 572-7896Call View Profile

South West Radon Pros Inc.

Kitchener, ON

5.0(76)Google

Offers C-NRPP certified radon testing, mitigation, and DIY fix solutions. Serving Kitchener, Waterloo, Cambridge, Guelph, and surrounding areas, they guarantee reduced radon levels in residential settings.

TestingMitigation

(519) 807-1995Call View Profile

Rival Home Inspections

Ajax, ON

5.0(209)Google

Offers radon services. Serves Ajax, ON, Toronto, Durham, York, Peel, Halton, Simcoe, Brant, Dufferin, Kawartha Lakes, Hamilton, Waterloo, Peterborough, and all GTA Regions.

Testing

(905) 922-5437Call View Profile

Geosyntec Consultants

Guelph, ON

5.0(1)Google

Geosyntec Consultants is a C-NRPP certified radon testing and mitigation professional serving Guelph, ON. They offer complete radon solutions from initial testing through to mitigation system installation.

TestingMitigation

(519) 515-0886Call View Profile

EXP Service Inc.

London, ON

4.2(11)Google

EXP Service Inc. is a C-NRPP certified radon testing and mitigation professional serving London, ON. They offer complete radon solutions from initial testing through to mitigation system installation.

TestingMitigation

(519) 963-3000Call View Profile

BluMetric Environmental Inc.

Kitchener, ON

3.0(2)Google

BluMetric Environmental Inc. is a C-NRPP certified radon testing and mitigation professional serving Kitchener, ON. They offer complete radon solutions from initial testing through to mitigation system installation.

TestingMitigation

1 877-487-8436 ext. 267Call View Profile

Expert Plumbing and Drains Inc

Burlington, ON

5.0(222)Google

A full-service plumbing and drain company offering heating and radon services. Brings over 80 years of combined experience to homeowners and custom home builders.

Testing

(905) 531-4111Call View Profile

Canada Post

Mississauga, ON

2.2(191)Google

Canada Post is a C-NRPP certified radon testing professional serving Mississauga, ON. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(416) 909-6969Call View Profile

ECOH

Mississauga, ON

5.0(6)Google

ECOH is a C-NRPP certified radon testing professional serving Mississauga, ON. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(905) 795-2800Call View Profile

Martech Group Inc.

Mississauga, ON

5.0(21)Google

Martech Group Inc. is a C-NRPP certified radon testing professional serving Mississauga, ON. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(416) 801-0593Call View Profile

Accurate Construction

Acton, ON

4.1(13)Google

Accurate Construction Ltd. mainly repairs basement foundation cracks from inside using polyurethane injection, and also installs radon mitigation systems to lower indoor radon levels. It serves over 30 Ontario communities from Hamilton to Barrie and Vaughan to Oshawa.

Testing

(519) 853-3966Call View Profile

Harmanjit Singh

Brampton, ON

Harmanjit Singh is a C-NRPP certified radon testing professional serving Brampton, ON. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(905) 519-3565Call View Profile

Radon PI

Dundas, Ancaster, Burlington, ON

Radon PI is a C-NRPP certified radon testing and mitigation professional serving Dundas, Ancaster, Burlington, ON. They offer complete radon solutions from initial testing through to mitigation system installation.

TestingMitigation

(905) 979-3277Call View Profile

Thorntin Macdonald

Orangeville, ON

Thorntin Macdonald is a C-NRPP certified radon testing professional serving Orangeville, ON. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(416) 258-0568Call View Profile

Daniel Jennings

Stoney Creek, ON

Daniel Jennings is a C-NRPP certified radon testing professional serving Stoney Creek, ON. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(289) 456-1023Call View Profile

The Radon Man

Hamilton, ON

The Radon Man is a Hamilton-based C-NRPP certified contractor who tests homes for radon, diagnoses entry points and installs and verifies mitigation systems. He serves Hamilton, Ancaster, Dundas, Stoney Creek, Burlington, Grimsby, Oakville and Niagara.

MitigationTesting

View Profile

Local radon data

How common is high radon in Waterloo?

Lower

1 in 12

homes tested in the Waterloo 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.

Waterloo

1 in 12

Ontario

1 in 7.6

Canada

1 in 5.6

Postal areas nearby with the highest estimates

50 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 Waterloo on the radon map

Test before you call a pro

Know your radon level in Waterloo 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

View on Amazon.ca

Compare all detectors · As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Frequently Asked Questions: Radon in Waterloo

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

Most homeowners in Ontario pay between $2,200 and $3,800 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.

Waterloo 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.