Radon: What is it?
Radon is an odorless, tasteless, colorless, invisible, radioactive gas that is naturally present in the environment. As uranium in the environment decays, radon gas forms as part of the decay process.
Why is Portland so rich with it?
Thanks to the most recent ice age (no, not the winter of 2008; we are reaching back approximately 15,000 years ago), granite-rich sediment washed into parts of the Portland metro area. Granite sediment can be high in uranium, and as that uranium decays, radon gas forms and rises up from the ground.
Why do we care?
According to a July 2013 Oregonian article, radon may be accumulating in Portland area homes at a higher rate than the national average. Aside from smoking, it is the second-leading cause of lung cancer in the U.S., and it is the primary cause of lung cancer among non-smokers. As uranium in the ground decays, radon gas migrates up to the Earth’s surface and can seep into homes through joints, cracks, or gaps in foundations. The gas can then be trapped inside the home, and can build up to unacceptable levels.
It re-emerged as a topic of conversation in January 2015 when health officials with the Oregon Health Authority issued a recommendation that all Oregonians test their homes for it. Unfortunately, it is again in the news in June 2016 when high radon test levels in some of Portland’s public schools have come to light.
I am thinking about buying a home. What do I do if it is present?
Testing is relatively simple. It is a common test that can be requested as part of the home inspection process. Tests come with a written report of the findings and recommendations for additional testing or mitigation if necessary. The U.S. EPA recommends that if your test results are 4 pCi/L or higher, you take the necessary steps to lower the levels of radon in your home. As the gas is a known carcinogen responsible for approximately 20,000 cancer diagnoses per year, you might decide to mitigate radon in the house even if it appears at a lower level than the EPA’s recommended action level.
There are numerous mitigation contractors throughout the metro area who can help you develop the best solution for your home.
Additional Resources:
- Oregon Health Authority
- Kansas State University National Radon Program Services (purchase short-term tests for $15; long-term tests for $25; includes results)
- EPA
Local Testing Companies: