Radon Gas Testing
Professional radon measurement services — Health Canada aligned.
Overview
Protect your indoor air quality with professional radon testing across Vancouver Island.
Radon is a naturally occurring radioactive gas that enters buildings from the soil. It is invisible, odorless, and tasteless — making professional measurement the only reliable way to detect it.
We provide science-based radon measurements following Canadian guidelines to help you understand your long-term exposure risk.
Credentials
C-NRPP Certified · CARST Member
How it works
How radon enters your home
Radon is produced underground and rises through soil. Once it reaches your foundation, even tiny gaps let it inside — invisible, odorless, and accumulating over time.
Foundation cracks
Hairline cracks in concrete walls and slabs.
Sump pump
Open pits create a direct soil-to-air path.
Floor joints
Construction joints between slab and walls.
Pipe gaps
Service entries for water, gas, sewer.
Crawl space
Exposed soil under the home releases radon.
Radon at a glance
By the numbers
#2
Cause of lung cancer
in Canada — second only to smoking.
200Bq/m³
Health Canada guideline
Long-term average above this? Reduce it within 1 year.
91days
Minimum long-term test
In the heating season. Health Canada recommends 3–12 months.
80–95%
Reduction
Achievable with proper mitigation systems.
What is radon?
Radon gas is produced from the natural breakdown of uranium in soil and rock. It enters wherever a building touches the ground, so levels are often highest in basements and crawl spaces — but high levels can be found anywhere in a home.
Why radon is a health concern
Long-term exposure to elevated radon may increase the risk of lung cancer. Health Canada identifies radon as the second leading cause of lung cancer in Canada after smoking.
- Higher concentration levels increase risk
- Longer exposure time increases risk
- Poor ventilation concentrates radon indoors
- Smoking significantly amplifies radon risk
Why radon matters in British Columbia
Radon levels in BC vary significantly due to geology. Vancouver Island homes — especially in the central and north Island — sit on uranium-bearing bedrock, and that combined with tight modern building envelopes, crawl-spaces, and seasonal pressure differences can drive levels well above the Health Canada guideline. The only way to know your risk is to test.
The guideline
What your result means
Health Canada’s guideline is 200 Bq/m³ — for your home’s average level, measured with a long-term test of at least 91 days.
Bq/m³ (Becquerels per cubic metre)
Below the guideline
Below 200
The risk is small, but no level is risk-free. Any reduction lowers your risk.
Above the guideline
Above 200
Reduce it within 1 year — sooner if the level is higher — to as low as reasonably achievable.
Long-term average only
91+ days
Short-term readings can't be compared with the guideline. Test for at least 91 days in the heating season.
Measurement, not guesswork.
Every test uses professional-grade equipment and lab-verified analysis — no surprises, just data you can act on.
Book a TestOur radon testing services
Long-Term Radon Testing
An average over at least 91 days — ideally all in the heating season — from a passive detector or electronic monitor. Health Canada recommends 3 to 12 months, and this is the result it says to compare with the 200 Bq/m³ guideline.
Rapid Radon Screening (Sniffing)
~4 hour on-site diagnostic scan that shows where radon may be entering (floor cracks, sumps, drains, crawl spaces) and where to test. It doesn't measure your average exposure.
Short-Term Screening
2–7 day preliminary assessment, useful when time is limited, such as during a home sale. A long-term test is still recommended: Health Canada says short-term results aren't appropriate for mitigation decisions.
Continuous Radon Monitoring (CRM)
Real-time hourly tracking with high-precision measurement, ideal for diagnostic and professional investigations.
Note:Scans and short-term tests are screening tools. Only a long-term (91+ day) average should be compared with the Health Canada guideline or used to decide on mitigation.
What you receive
After testing you receive a clear report that includes:
- Average radon concentration (Bq/m³)
- Health Canada guideline comparison
- Exposure risk interpretation
- Non-technical explanation in plain language
- Recommendations if mitigation is needed
The fix
How mitigation removes radon
A sub-slab depressurization system creates a low-pressure zone under the foundation — radon is captured before it enters the home and vented harmlessly above the roof.
Suction below the slab
A pipe is set into the soil beneath the basement floor.
Sealed entry points
Cracks and gaps in the foundation are sealed shut.
Inline radon fan
A continuous low-watt fan pulls air up through the pipe.
Vented above the roof
Radon disperses safely high above living spaces.
If high radon levels are found
Elevated radon is treatable. If your long-term average is above 200 Bq/m³, Health Canada recommends reducing it within 1 year — sooner if the level is higher — to as low as reasonably achievable. A properly installed mitigation system can typically reduce levels by 80–95%.
- Sub-slab depressurization system
- Sealing cracks and foundation gaps
- Ventilation improvements
- Post-mitigation verification testing
Note:We measure — we don't install mitigation systems. If your levels are high, we'll point you to C-NRPP-certified mitigation professionals and can test again after the work. Health Canada also recommends re-testing homes with an active system every 5 years.
Why choose us
Science-backed measurement, clear reporting.
Serving Vancouver Island
From South Island to North Island — major centres served:
- Victoria
- Sidney
- Sooke
- Duncan
- Nanaimo
- Parksville
- Qualicum Beach
- Port Alberni
- Courtenay
- Comox
- Campbell River
- Tofino
Book your radon gas testing today.
Fast scheduling. Professional indoor air quality testing across Vancouver Island.