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Radon Testing & Mitigation in Calgary

C-NRPP certified radon professionals — certification, licence, insurance and WCB checked before the badge goes on.

Verified listings opening as checks complete · Category last reviewed August 2026

Radon is a radioactive gas you can't see, smell or taste, produced by uranium breaking down in prairie soil — and it's the leading cause of lung cancer in non-smokers in Canada. The Prairies have some of the highest documented residential radon levels in the world: studies (including the University of Calgary's Evict Radon program) have found that roughly one in six Alberta homes — and by some recent surveys as many as one in four — exceed Health Canada's guideline of 200 Bq/m³. New homes aren't exempt; some of the highest readings come from newer builds. The good news is that radon is one of the most fixable home-health problems there is. A long-term test (about $35–$60 for a mail-in kit, or $150–$400 professionally) tells you your number; if it's high, a mitigation system — typically $2,000–$3,500 installed in Calgary — reduces levels dramatically, usually within a day's work. The catch is competence: radon work is certified, not just licensed. C-NRPP (the Canadian National Radon Proficiency Program) is the national standard, and for this category we verify it on every badged company — alongside our usual licence, insurance and WCB checks. If someone offers to "fix your radon" without a C-NRPP number, keep looking.

What we verify for radon testing & mitigation

  • C-NRPP certification verified (required)
  • Active municipal business licence
  • WCB Alberta in good standing
  • Current liability insurance certificate
  • BBB standing reviewed
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Radon Testing & Mitigation in Calgary, answered

Should I test before calling a mitigation company?

Yes — always test first. Radon varies house to house, even between neighbours. A three-month test during heating season (fall–spring) is the gold standard. Some companies on this page offer C-NRPP-certified measurement if you'd rather not DIY the kit.

My reading is above 200 Bq/m³. How urgent is this?

Health Canada recommends remediating within two years at 200–600 Bq/m³, and within one year above 600. It's a chronic-exposure risk, not an acute one — no panic required, but it shouldn't sit on the someday list, especially with kids or a basement bedroom.

What does mitigation actually involve?

The standard fix is active sub-slab depressurization: a sealed pipe through the basement slab connected to a quiet fan that vents soil gas outside before it enters your home. Most Calgary installs are done in a day and cut levels by 80–90%+. Your installer should retest after installation to prove the result.

Does radon affect resale?

Increasingly, yes. Radon testing is appearing in more Alberta real-estate transactions, and a documented sub-200 reading with a professionally installed system is becoming a selling point — while an unaddressed high reading discovered by a buyer's inspector is a negotiation problem.

Do new homes need testing too?

Yes. Post-2010 builds have shown some of the higher readings in Alberta studies — modern airtightness can concentrate soil gas. Alberta's building code now requires a radon rough-in pipe in new homes, which makes mitigation cheaper, but the rough-in alone is not a system.