Radon Testing & Mitigation in Halifax, NS
Halifax and the Halifax Regional Municipality sit on some of the most radon-prone bedrock in Atlantic Canada. Nova Scotia's Meguma Zone — ancient metamorphic rocks rich in uranium — underlies much of the province, and Halifax residents face a higher-than-national-average risk of elevated indoor radon.
Why Radon Is a Concern in Halifax
Halifax is built directly on Devonian granite and Meguma Group slate and quartzite, formations with among the highest uranium concentrations of any bedrock in Canada. The thin, rocky soils typical of the Halifax peninsula allow rapid radon migration from bedrock to foundations. Homes in older neighbourhoods like the South End, North End, and Dartmouth are particularly at risk, as many sit on exposed or near-surface granite.
Radon is a colourless, odourless radioactive gas produced by the natural decay of uranium in soil and rock. It enters homes through foundation cracks, pipe penetrations, sump pits, and floor drains. Once inside, it accumulates — especially in basements and lower-level living areas — and poses a serious long-term lung cancer risk. Radon is the second-leading cause of lung cancer in Canada, responsible for approximately 3,200 deaths each year.
Radon Levels in Halifax
Average exposure: Elevated — Nova Scotia's granite bedrock produces some of Atlantic Canada's highest radon readings
Health Canada's national action level is 200 Bq/m³ (becquerels per cubic metre). Any home testing above this level should undergo radon mitigation. However, Health Canada also recommends taking action at levels above 100 Bq/m³ when mitigation is cost-effective — which it almost always is.
There is no known "safe" level of radon exposure. The lower your home's radon level, the lower your risk.
How to Test for Radon in Halifax
The most accurate and cost-effective method for residential radon testing is a long-term alpha track test. These CPA-certified passive detectors are placed in the lowest occupied area of your home for a minimum of 90 days, capturing seasonal variation for a reliable annual average. Short-term tests (under 7 days) are acceptable for real estate transactions but should not substitute for a long-term test.
Testing is simple, DIY-friendly, and inexpensive. We recommend the Long Term Alpha Track Test Kit — certified by the Canadian Radon Proficiency Program (C-NRPP) and trusted by homeowners across Nova Scotia.
How to test:
- Place the detector in the lowest livable area of your home (finished basement, bedroom, or office below grade)
- Leave it undisturbed for 90 days (minimum) to 12 months (ideal)
- Mail the detector to the certified lab
- Receive your results within 2–3 weeks with a full report
How to Mitigate Radon in Halifax
If your test results exceed 200 Bq/m³ — or if you simply want to reduce exposure — sub-slab depressurization (SSD) is the gold-standard mitigation method. A certified mitigation contractor (or experienced DIYer) installs a PVC pipe through the basement floor into the soil below, connected to a continuously running radon fan. The fan creates negative pressure beneath the slab, drawing radon out before it can enter your home.
SSD systems typically reduce indoor radon by 80–99% and cost between $1,500–$3,000 installed. For DIY installations, the primary cost is the fan and fittings.
We recommend the RadonAway RP140 Energy Star — a professional-grade fan suited to Halifax-area homes and Nova Scotia's variable soil conditions. Browse our full radon mitigation fan selection or our complete installation parts collection.
Radon and Real Estate in Halifax
Halifax home buyers are advised to test for radon, especially in the HRM's older housing stock. Nova Scotia Environment has published radon mapping data showing elevated risk zones across Halifax County.
Health Canada recommends testing any home you intend to purchase, regardless of age or construction type. Our radon and real estate guide explains when to test, how to interpret results, and how to negotiate remediation into a purchase agreement.
Frequently Asked Questions — Radon in Halifax
- Do all homes in Halifax have radon?
- All homes have some level of radon — the question is how much. Testing is the only way to know your home's actual level. Given Halifax's elevated regional risk, testing is particularly important here.
- Does a newer home have less radon?
- Not necessarily. Modern energy-efficient homes are often more airtight, which can lead to higher radon accumulation. Some newer Nova Scotia homes built since 2019 include rough-in radon systems under national building code requirements, but these must still be activated and tested.
- How long does radon mitigation take?
- A standard SSD installation takes a professional 2–4 hours. DIY installations typically take a day. The fan runs continuously at low power — most fans use 20–90 watts, less than a light bulb.
- Is radon mitigation covered by insurance or government programs?
- Radon mitigation is generally not covered by standard home insurance. No federal rebate program currently exists in Canada, though some provinces have offered periodic incentives. Check with your municipality or provincial health authority for any available local programs.
Get Started Today
Radon is the most significant environmental health risk inside your Halifax home — and it's entirely preventable. Whether you're testing for the first time or ready to mitigate, Radon Depot has everything you need.
- Order a radon test kit — CPA-certified, lab-analyzed, Nova Scotia-trusted
- Shop radon mitigation fans — professional-grade SSD systems
- Learn how radon mitigation works
- Read our full Radon FAQ
