Oxford County
Radon testing and mitigation in Tillsonburg, Ontario
Tillsonburg has become a popular place to retire, with many bungalows and adult-lifestyle communities alongside its older town core. Here’s what’s known about radon in Tillsonburg, and how to find out about your home.
- Region
- Oxford County
- Population
- about 19,000
- Public health
- Southwestern Public Health
- Local factors
- 4 reasons to test
Is radon a problem in Tillsonburg?
Radon can exceed Health Canada’s 200 Bq/m³ guideline in any Tillsonburg home. No published local data rules any neighbourhood in or out. Across Ontario, about 1 in 8 homes tested at or above the guideline in the 2024 national survey. Locally, sandy or gravelly soils, lived-in basements and rural drilled wells are reasons to test. A 91-day test is the only way to know your home’s level.
Radon in Tillsonburg
Tillsonburg has become a popular place to retire, with many bungalows and adult-lifestyle communities alongside its older town core. In a bungalow the basement is often the main family room, guest room or hobby space, where radon is usually highest.
The ground under Tillsonburg
Tillsonburg sits on the northern edge of the Norfolk Sand Plain, along the Otter Creek valley. These sandy soils drain fast and let soil gas travel freely, so radon formed in the ground has a good chance of reaching a foundation before it decays.
Tillsonburg’s homes
Slab-on-grade bungalows, homes with full finished basements and older houses near the downtown all show up here. Retirees spend more hours at home, which raises exposure at any given radon level. Rural homes on wells around Otterville and Courtland add another factor.
What the data says
Ontario homes at or above Health Canada’s 200 Bq/m³ guideline in the 2024 Cross-Canada Survey, more than double the share found a decade earlier.Source: Cross-Canada Survey of Radon Exposure in the Residential Buildings of Urban and Rural Communities (2024)
Free loan period for digital radon monitors through Oxford County Library. Useful for a first look, not a substitute for a 91-day test.Source: Oxford Today — Oxford County Library offers radon monitors for loan
Higher average radon exposure for rural residents than urban residents in a 2024 national study of 42,051 homes, mostly linked to drilled wells.Source: Goodarzi et al., Scientific Reports (2024) — rural communities and drilled-well annuli
Local results
Building a real radon picture for Tillsonburg
Public radon data for Southern Ontario towns is thin. The national surveys tested only a handful of homes per area. So we’re building our own: anonymized long-term results from homes we test, published by area once there are at least 30, so no single home can be identified and small samples can’t mislead.
Tillsonburg: collecting results. Already tested? Check your number and share it anonymously when you book.
Local factors
What can push radon up in Tillsonburg
Not a prediction for any single home, just the reasons a test is worth it here.
Sandy or gravelly soils
Sand and gravel let soil gas move freely and over longer distances. More of the radon formed in the ground can reach the air around your foundation instead of decaying in place.
Lived-in basements
Radon is usually highest on the lowest floor. Basement bedrooms, home offices and rental suites mean people spend hours a day where exposure is greatest.
Rural homes on drilled wells
A 2024 national study of over 42,000 homes found rural residents were exposed to about 30% more radon than urban residents, with most of the gap linked to drilled wells. Researchers suspect gas travels up the gap around the well casing.
Century homes
Fieldstone, rubble and early concrete foundations, earth-floor cellars and open sumps give radon many ways in. Older doesn’t mean safer: these homes still need a test.
Where we work
Tillsonburg neighbourhoods and nearby communities
- Tillsonburg
- Otterville
- Norwich
- Courtland
- Springford
- Brownsville
- Straffordville
Nearby: Radon in Woodstock · Radon in Aylmer · Radon in Simcoe
How it works
From test to fix
- Book
Tell us about your Tillsonburg home. We reply within one business day.
- Test for 91+ days
A certified technician places long-term detectors on your lowest lived-in floor. You get an early reading at 2 weeks.
- Get your result
Lab-verified average, explained against Health Canada’s guideline.
- Fix it if it’s high
A sub-slab system designed for your foundation, at a fixed price, with results guaranteed.
Questions
Radon in Tillsonburg: FAQ
Is radon a problem in Tillsonburg?
Radon can exceed Health Canada’s 200 Bq/m³ guideline in any Tillsonburg home. No published local data rules any neighbourhood in or out. Across Ontario, about 1 in 8 homes tested at or above the guideline in the 2024 national survey. Locally, sandy or gravelly soils, lived-in basements and rural drilled wells are reasons to test. A 91-day test is the only way to know your home’s level.
Do slab-on-grade homes get radon?
Yes. Any floor in contact with soil can let radon in through cracks, joints and penetrations. Slab-on-grade homes can be mitigated with sub-slab depressurization too; the suction point is just placed differently.
Is radon more dangerous for seniors?
Risk comes from total exposure over time, so people who spend more hours at home on the lowest floor accumulate more. Lung cancer risk from radon is far higher for current and former smokers. A test is the simplest way to know whether it applies to you.
Do you offer radon testing and mitigation in Tillsonburg?
Yes. We test and mitigate homes throughout Tillsonburg, including Tillsonburg, Otterville, Norwich, Courtland, Springford and nearby. Call (226) 271-4667 or book online.
Radon is fixable. First, know your number.
Serving Tillsonburg, Woodstock, Aylmer and Simcoe.