Radon Professionals · Newfoundland and Labrador

Find a Radon Professional in Newfoundland and Labrador

3 certified professionals across 2 cities

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St. John's
2 certified professionals
Middle Cove
1 certified professional

About Radon in Newfoundland and Labrador

Last updated: March 2026

Newfoundland and Labrador has above-average radon risk driven by the province's uranium-rich Precambrian geology. The Avalon Peninsula, home to St. John's and a large share of the province's population, sits over ancient gneiss and granite that produces elevated soil radon. Homes on the island portion of the province are often built over bedrock with minimal soil buffer, and the province's cold, windy climate means structures are well-sealed during the long heating season. Health Canada surveys show a meaningful portion of NL homes exceed the guideline.

Typical Mitigation Cost in Newfoundland and Labrador

$2,500–$4,200

Above national average

Higher costs reflect limited contractor availability outside St. John's and the island's older housing stock, which often requires more sealing work.

  • •Bedrock proximity: many NL homes are built over or very close to exposed rock
  • •Older construction with rubble or block foundations common in St. John's
  • •Limited contractor availability outside of the Avalon Peninsula
  • •Complex pipe routing in row houses and older attached homes
  • •Weather considerations during installation in coastal communities

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Frequently Asked Questions: Radon in Newfoundland and Labrador

The province's ancient Precambrian bedrock contains elevated uranium concentrations that produce radon continuously. Many homes, particularly in St. John's and smaller island communities, are built directly over this rock or on shallow soils with minimal radon buffering.
St. John's sits on the Avalon Peninsula's granite and gneiss geology. Health Canada surveys have documented elevated levels in a significant proportion of the city's homes, particularly in older properties built with rubble or block foundations.
Newfoundland and Labrador follows Health Canada's national guideline of 200 Bq/m³. The provincial Department of Health and Community Services endorses Health Canada's testing and mitigation recommendations.
Radon testing is not a legal requirement in Newfoundland and Labrador real estate. However, awareness has grown significantly in recent years, and some buyers in St. John's now include it in their home inspection checklist.
A long-term alpha track detector placed in the lowest livable area for at least 91 days during the heating season is the most reliable approach. Detectors are available from certified retailers and can be mailed to a lab for analysis.
Labrador's geology includes Precambrian rock formations similar to the island, and radon risk exists there as well. Limited data means population-level surveys are less comprehensive for Labrador, but testing is still recommended.
Certified professionals are available on the Avalon Peninsula and in some other areas of the province. Remote communities may have fewer options. Use the city search above to find the nearest certified professional.
Costs typically range from $2,000 to $3,500. Older St. John's homes with row-house configurations, rubble foundations, or complex layouts tend to be at the higher end of this range.

Radon Resources for Newfoundland and Labrador

Tools and guides to help you understand radon risk and take action.

Check your radon risk
Estimate your risk based on province, home age, and foundation type.
Understand your test results
Learn what Bq/m³ means and when action is required.
DIY radon test kits
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Radon guides & articles
In-depth guides on testing, mitigation, and health risk.
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Radon FAQ
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