11%
of Windsor-Essex homes tested above 200 Bq/m³
200 Bq/m³
Health Canada (opens in a new tab)'s guideline. Above it, fix it.
At least 91 days
How long a long-term test runs
From $3,000
A typical radon system from us, plus HST
In the health unit's 2015 to 2018 study (opens in a new tab), 11% of Windsor-Essex homes tested above 200 Bq/m³: 18% in Essex County and 6% in the City of Windsor (WECHU, Radon: Know Your Level 2015 to 2018). The only way to know your home's number is to test. See the local numbers.
It's a radioactive gas that comes from uranium breaking down in soil and rock. You can't see, smell or taste it, and Health Canada (opens in a new tab) calls it the number one cause of lung cancer in people who don't smoke. What radon is and how it gets in.
In the colder months. Health Canada says indoor radon is usually higher then, with windows and doors shut. Our guide to short and long tests says which to use.
Health Canada says a long-term test runs at least 91 days. A short test gives a quicker look. Our test is long-term. Our guide covers which one fits.
Essex County Library lends a digital radon monitor for up to 3 weeks, usually in the colder months (WECHU, Information about radon testing (opens in a new tab); Kingsville Times, October 2025 (opens in a new tab)). It's a short look, not a long-term test. We haven't confirmed whether City of Windsor residents can borrow one. Our guide covers test kits and library loans.
Yes, that's how our test works. We mail you a detector, you mail it back, and we send it to an independent lab. It's $300 plus HST, with shipping both ways included. How our test by mail works.
A long-term kit, run for at least 91 days, gives you a number you can compare with the guideline. Our long-term test comes by mail. It's $300 plus HST and covers the detector, shipping both ways, the lab fees and a written result. If you already have a kit or library result, we'll quote from it, with no retest needed for the quote. If it was a short test, Health Canada still says to base the decision on a long-term one. Compare your testing options.
Health Canada's guideline is 200 Bq/m³. If a long-term test comes back above it, Health Canada says to fix it within a year, and sooner the higher it is. What your number means.
Our page on high results takes you through the next steps, one at a time. What to do with a high result.
Not for sure. Health Canada says radon levels vary from one house to another, even next door. See the local numbers.
The most common kind runs a pipe through the basement floor. A small fan pulls radon from under the house and sends it outside before it gets in (Health Canada (opens in a new tab)). How a radon system works.
In a 2019 to 2020 national contest run by Take Action on Radon, 256 homeowners who'd had a C-NRPP professional put in a radon system reported paying $2,718 on average. That's one contest's average, not a price survey (Take Action on Radon, Radon Reduction Sweepstakes Report 2019 to 2020 (opens in a new tab)). A typical system from us starts at $3,000 plus HST, and we quote after a free visit to your home. See our prices.
It can help, but Health Canada says how much depends on how high your level is and on the house itself. What sealing can and can't do.
Health Canada (opens in a new tab) says a balanced ventilation system can help. Our HRV guide covers how much, and when it's enough.
A 91-day lab test after the install comes with every system. Every system we put in is designed with a target of below 100 Bq/m³, well below Health Canada's guideline of 200. If your results come back higher than expected, we come back, check the system and work to bring your levels down. C-NRPP (opens in a new tab) also suggests your own long-term test in the next heating season. How it works, step by step.
Yes. We service, repair and retest systems other installers put in, from $300 plus HST. See our prices.
Look them up on C-NRPP's Find a Professional (opens in a new tab), or check a certificate number on C-NRPP's Certification Check (opens in a new tab). The Canadian Radon Services Index (opens in a new tab) lists certified businesses too. More on how to check a radon contractor.
Health Canada (opens in a new tab) doesn't recommend testing during a sale. It says to test before you sell or after you buy. If the home already has a radon system, we can inspect or retest it for you, from $300 plus HST. Our page on buying or selling has more.
No Ontario law requires landlords to test for radon. The general duty to keep a unit in good repair still applies (Residential Tenancies Act, 2006, s. 20 (opens in a new tab)). For your situation, talk to a lawyer or a paralegal. The Landlord and Tenant Board is where a tenant files. Our rentals guide has more.
That's a radon rough-in. New homes built under the 2024 Ontario Building Code (opens in a new tab) must have one (OBOA (opens in a new tab)). Activating it means adding a fan and running the pipe outside. Radon in new homes.
Our radon professional's certificate numbers are on our About page, with links to C-NRPP's Certification Check and our CRSI listing.
We're based in Tecumseh and work across Windsor and Essex County. We'll go anywhere, with no travel charge. See the towns we cover.
Call or text 519-991-8180, email radon@windsorradon.ca, or send us a message with your address and your result if you have one. We answer every call and form message ourselves, within 24 hours.
Call, email or send us a message. Tell us your result if you have one.