Sustainability tip: Why testing your home for radon is important
January is National Radon Action Month. Though radon gas levels are a concern throughout the whole year, the cooler months are more of a concern and represent the best time to conduct radon testing because your home is generally closed from the outside.
What is radon?
You can’t see it, and you can’t smell it or taste it. But it’s everywhere. The federal Environmental Protection Agency has classified radon gas as a cancer-causing, radioactive gas, produced by the natural breakdown of uranium. As uranium decays in soil, rock and water, it produces radon gas that moves up through the soil and into the atmosphere.
It has been found in all 50 states, and almost half the homes in Colorado have radon levels higher than the EPA’s recommended level of 4 picocuries per liter. In 2003, the EPA conducted a risk assessment and found that radon causes an estimated 21,000 lung cancer deaths per year in the United States, making it the second-leading cause of lung cancer after smoking-related lung cancer deaths.
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Buildings act as containers for radon gas as it seeps up through the soil, allowing it to concentrate at dangerous levels. Common entry points include spaces between basement walls and the slab, cracks in foundations and/or walls, openings around sump pumps and drains, construction joints and plumbing penetrations, crawl spaces and well water. Building age and type has no effect on radon concentrations, so even new construction projects can contain high levels of radon gas — unless properly mitigated.
How can you test your home?
There are two types of do-it-yourself testing: short-term and long-term. Short-term radon tests are placed in the home for 48 to 96 hours and then mailed to a laboratory that analyzes the test. Once you have mailed in your test, the testing facility can usually send your results within three to five business days. Radon levels vary from season to season — even from day to day, short-term tests are usually used as a baseline method. If your results are higher than the EPA’s recommended level of 4 picocuries per liter, you should complete another short-term test or follow up with a long-term test. Long-term tests usually remain in the home for more than 90 days and produce results that better reflect the year-round concentration of radon gas in your home.
Regardless of which testing method you use, radon mitigation is highly suggested for results above 4 picocuries per liter.
Walking Mountains Science Center rebates radon mitigation projects. Please contact Energy Smart Colorado at Walking Mountains Science Center by calling 970-328-8777 to find out more. Additionally, the Colorado Department of Public Health and Environment offers radon mitigation assistance to income-eligible households. Visit the department’s website (www.colorado.gov/pacific/cdphe/categories/services-and-information/environment/radon) for further information.
Matt Parker is the energy programs associate at Walking Mountains Sustainability. For more information on radon test kits, or the CARE program, contact Matt at email@example.com.
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