Is my radon detector listed, recalled or due for replacement?

Look up a radon detector by make and model to see three separate statuses, each with its source and the date we checked it. They are its C-NRPP consumer listing, its C-NRPP professional approval and its Health Canada recall or advisory status. The tool also shows whether an electronic monitor is due for replacement. It cannot tell you the radon level in your home, because only a test can do that.

Browse every tested device, with its three statuses.

C-NRPP recommends only monitors graded A or B in its performance testing

C-NRPP grades each consumer monitor it tests by its measurement error, from A down to E. Grade A means an error of 10% or less. Grade B means an error above 10% and up to 20%, and the scale runs down to E, above 40%.

A monitor needs grade A or B to be recommended. Below B, it is listed as not recommended. A monitor missing from the list may never have been entered.

Open each listed device’s own record.

A recalled detector cannot be sold or given away, and its readings are not reliable

Health Canada has recalled or flagged some monitors because they gave inaccurate readings. Some reported a low value whatever the actual radon level was. In Canada, it is illegal to sell, redistribute or give away a recalled product.

Each recall names a specific model, not a whole brand. Match the exact model number before you trust or pass on a device.

Check the warning signs before you pay.

Many consumer monitors cannot be recalibrated, so consider replacing them after five years

Health Canada says to consider replacing an electronic monitor five years after you bought it. The exception is a monitor that has been recalibrated to the manufacturer’s specifications. Many consumer monitors cannot be recalibrated at all.

This rule is about the monitor. A home with an active radon system has its own five-year retest.

See how to run a long-term test.

Professional-grade devices sit on a separate C-NRPP list

Consumer monitors cannot be professionally calibrated, and they are not approved for professional measurement. Professional devices are on a separate C-NRPP list and are used with an approved laboratory. The tool shows professional approval as its own status, apart from the consumer listing.

See how to hire a certified professional who uses approved devices.

A device on neither list may still be under testing or review

Some devices appear on neither C-NRPP list, and that absence does not show that a device failed. Health Canada says some of these are still being tested or are under review. Others were never entered, because manufacturers choose whether to submit a monitor.

See how to choose a monitor C-NRPP recommends.

How to work it out by hand

You can check a device yourself from the same public records the tool reads. Work through these steps in order, and note the date on each status you find.

1. Find the exact make and model in the devices dataset.
2. Read its C-NRPP consumer listing in the 2024/25 performance report: recommended or not recommended.
3. Read its Health Canada recall status, and match the exact model, not only the brand.
4. If it is not on the list, it may not have been entered, or it may be under review.
5. Check when you bought it. Five years on, consider replacing it unless it has been recalibrated.
6. For a professional result, the device must be on C-NRPP’s professional list.

See how we check our records and their dates.