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Radon detectors are at your local library!


Which libraries in Northwestern Ontario have Digital Radon Detectors available for loan?

Beginning in November, Digital Radon Detectors will be available at the following locations:

  • Thunder Bay Public Libraries
  • Oliver Paipoonge Public Libraries
  • Nipigon Public Library
  • Red Rock Public Library
  • Dorion Public Library
  • Marathon Public Library

Free public information workshops will launch the program in each participating area. Click here to find an upcoming presentation near you.

New libraries will be added in 2020. If your location is not listed here, please ask your librarian to contact to inquire about participating. 

Why should residents of Northwestern Ontario test for radon gas?

Radon is the #2 cause of lung cancer in Canada. Residents of Northwestern Ontario are at an increased risk for radon-induced lung cancer. A 2012 Health Canada study found that 12% of homes in the Thunder Bay District have high levels of radon, compared to 5% of homes across Ontario. The Thunder Bay District Health Unit has conducted follow-up municipal-level studies that have found that 16% of homes in Thunder Bay, 17% of homes in Marathon, and 65% of homes in Oliver Paipoonge test above the Health Canada guidelines. 

How do I use the short-term Digital Radon Detector?

Place the detector in the lowest room in your home where you spend four hours a day or more. Tests should be conducted in a bedroom, living room, or rec room. Do not test in a kitchen, bathroom, or hallway. Place the device in a location that is representative of the air that you breathe, for example on a bedroom nighttable. Do not move the device for the duration of the test. We recommend collecting data for 1-3 weeks. The longer the test, the more accurate your result.

What do my results mean?

The LONG TERM AVERAGE estimates your average annual radon exposure. Health Canada recommends that residents fix their homes if their long-term average is higher than the Canadian Guideline of 200 Bq/m3. Note that 200 Bq/mis not a "magic number" and other juristictions have set more proactive guidelines. The US Environmental Protection Agency's guildine is 150 Bq/m3, and the World Health Organization's guideline is 100 Bq/m3.

What is the difference between a short-term Digital Radon Detector and a long-term radon detector?

Both short-term Digital Radon Detectors and long-term radon detectors measure the level of the cancer-causing gas radon in your home. 

The main advantage of short-term Digital Radon Detectors is that they are reusable. Because of this factor, short-term Digital Radon Detectors can be on loan for free from local libraries. Many residents want to learn more about their radon levels before they invest $50 in a long-term radon test kit, and short-term Digital Radon Detectors make this possible. However, residents are encouraged to follow up using a long-term radon test that is certified by the Canadian National Radon Proficiency Program. Long-term radon detectors offer the most accurate measurement and should be used to make decisions about fixing your home. For more information on long-term radon detectors, click here

Where can I purchase a long-term radon test?

Long-term tests are available at EcoSuperior's office at 562 Red River Rd in Thunder Bay (corner of Red River & Hill). Throughout November we will be creating a master list of businesses in Northwestern Ontario that sell radon test kits. Call 624-2141 for information about radon test kits throughout Northwestern Ontario.

Where can I learn more?

Visit our All About Radon page for more information on local studies, long-term radon tests, and local testing and mitigation contractors.


This project is delivered with support from Health Canada. 

562 Red River Road,
Thunder Bay, Ontario
P7B 1H3

Monday to Friday
8:30am to 4:30pm

Phone: 807-624-2140

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