Radon is a radioactive gas produced naturally by the decay of uranium in the ground. It exists all over the world, although the amount of uranium and level of radon gas vary significantly, even from one house to the next. Radon is invisible, you can’t see it, smell or taste it and it can get into your home undetected.
The current Canadian Guideline for radon is 200 becquerels per cubic meter (Bq/m3). Becquerels per cubic meter is the unit of measurement for radon, the higher the number the greater the risk. Protecting your family’s health from the risk of radon exposure starts with learning more.
Radon in your home?
A recent study has shown that over 1 in 5 New Brunswick households have radon levels above the Canadian guideline- one of the highest in Canada. Radon is found in nearly all homes in Canada, new or old. The question is: how much is in your home? The gas can enter the home wherever it has contact with the ground. Radon tends to accumulate in the lower levels of the home, like the basement for example, where it can reach high concentrations.
The gas can seep into the house in a variety of places:
The only way to know if you have a radon problem in your home is to measure its concentration with a simple test.
Protect your family's heath
Health Canada recommends measuring radon in your home for at least three months, ideally in the fall and winter timeframe. Radon levels can vary significantly over time and, therefore, a long-term test is more accurate.
If the radon test results are above the Canadian Guideline of 200 becquerels per cubic meter (200Bq/m3), steps to reduce the level of radon in your home should be taken. The higher the level, the sooner corrective measures should be taken. Remember that you should not rely on your neighbors’ test result as results can vary significantly from one home to the next.
Test kits can usually be found at hardware stores. The Nova Scotia Lung Association is also offering long-term radon test kits at a price of $40. Please phone (888) 566-5864 or click here to purchase online.
Reduce radon levels
There are many ways to reduce the radon level in your home and, in most cases, these measures are simple and relatively inexpensive. For example:
The effectiveness of these methods will depend on the level of radon in the home and characteristics of the home. As each house is unique, a qualified or certified contractor can assess your home and recommend one or several mitigation techniques.
The work should be done by an experienced contractor who has received proper training from a certified organization. Expect the work to cost anywhere from $500 to $3,000.
For new homes
When a new home is being built, it is not possible to predict the levels of radon it will contain. It is therefore simpler and less expensive to adopt preventive measures during construction than to take steps later on.
In December the 2010 National Building Code revisions were released and included in them were new codes to protect against radon entry. These new codes apply to all new homes built in Canada, make sure that you builder is implementing them. The codes include:
For more details on these codes you can visit the web at:
Corrective and preventive measures are featured in the Canada Mortgage and Housing Corporation’s brochure “Radon – A Guide for Canadian Homeowners”.
Additional resources for radon measurement and mitigation are:
Frequently Asked Questions
Q: Where can I find radon test kits?
Q: What areas in Nova Scotia are known to have the highest levels of radon?A. The Geological Services Division of thee Nova Scotia Department of Natural Resources has produced an interactive map showing Radon levels throughout the province. NS Radon Map
Q: My radon test results came back and they are above Health Canada’s guideline of 200 Bq/m3. Now what?
A: First, don’t panic. You have the highest risk of developing lung cancer when you are exposed to high levels of radon for a long period of time – years or decades.
Next, consult the Canadian Mortgage & Homeowner’s Corporation’s booklet “Radon: a guide for Canadian homeowners”. Inside, you will find information about simple methods to reduce radon levels in your home. There is also information about dealing with contractors.
If you would like to do more extensive work to lower radon levels, look at the list on this webpage called “Companies that perform radon-related services”. Note these companies have self-identified themselves as being capable to deal with radon in some capacity. We do not endorse any of these companies.
If there isn’t a company listed in your area, call a reputable contractor. Ask friends and neighbours for recommendations.
Q: How does radon gas cause lung cancer?
A: Radon decays quickly, giving off tiny radioactive particles. When inhaled, these radioactive particles can damage the cells that line the lung. Long-term exposure to radon can lead to lung cancer.