Radon Basements: Why Denver's Dry Air Doubles the Lung Risk
By Franklin Everett ShawDenver. The Mile High City. It’s known for its stunning mountain views, craft breweries, and a vibrant outdoor lifestyle. But beneath the surface, literally, lies a hidden danger that many Denver residents, especially those with basements, are unknowingly exposed to: radon.
Radon is a colorless, odorless, radioactive gas that’s a byproduct of uranium decay in the soil. It’s a naturally occurring phenomenon, but Denver’s unique geological makeup, coupled with its dry climate, creates a perfect storm for elevated radon levels, significantly increasing the risk of lung cancer. This isn’t just a theoretical risk; it’s a tangible threat that demands immediate attention.
Denver’s soil is rich in granite, which contains uranium. As the uranium decays, it releases radon gas. This gas then seeps through the soil and can enter homes through cracks in the foundation, gaps around pipes, and other openings. Basements, being underground, are particularly vulnerable to radon accumulation.
The problem is compounded by Denver’s dry climate. Low humidity allows radon gas to remain airborne for longer periods. In more humid environments, radon particles tend to attach to water molecules and settle out of the air more quickly. In Denver, the dry air keeps the radon circulating, increasing the chances of inhalation.
The combination of high radon levels and dry air creates a particularly dangerous situation. Radon decays into radioactive particles that, when inhaled, can damage the cells lining the lungs. Over time, this damage can lead to lung cancer. The EPA estimates that radon is the second leading cause of lung cancer in the United States, responsible for approximately 21,000 deaths each year.
So, what can Denver residents do to protect themselves? The first step is to test your basement for radon. This is a relatively simple and inexpensive process that can provide crucial information about the radon levels in your home.
Here’s a step-by-step guide to testing radon levels in your Denver basement:
Purchase a radon test kit. You can find these kits at most hardware stores, home improvement centers, or online retailers. Look for kits that are approved by the EPA or your state radon program. In Colorado, the Department of Public Health and Environment (CDPHE) provides resources and information on radon testing.
Choose a testing location. The ideal location is in the lowest lived-in level of your home, typically the basement. Place the test kit in a frequently used area, away from drafts, high heat, and direct sunlight. Avoid placing it near exterior walls, windows, or doors.
Follow the instructions carefully. Each test kit comes with specific instructions. Read them thoroughly and follow them precisely. The accuracy of the test depends on proper placement and handling.
Leave the test kit in place for the recommended duration. Most short-term test kits require 2-7 days of exposure. Long-term test kits, which provide a more accurate annual average, require 90 days or more.
Send the test kit to the lab for analysis. Once the testing period is complete, seal the test kit according to the instructions and mail it to the designated laboratory for analysis. The lab will provide you with a report of the radon levels in your home.
What do you do if your radon test comes back with elevated levels? The EPA recommends taking action if the radon level is 4 picocuries per liter (pCi/L) or higher. Even levels between 2 pCi/L and 4 pCi/L warrant consideration of mitigation.
Here are some specific mitigation strategies tailored to Denver’s climate:
Soil Depressurization: This is the most common and effective radon mitigation technique. It involves installing a vent pipe and fan system that draws radon gas from beneath the foundation and vents it safely outside. This is usually done by a professional.
Sealing Cracks and Openings: Sealing cracks in the foundation and around pipes can help reduce radon entry. While this alone is rarely sufficient to lower radon levels below the EPA action level, it can be a helpful supplementary measure. Use a high-quality sealant specifically designed for concrete.
Increasing Ventilation: Improving ventilation in your basement can help dilute radon concentrations. This can be achieved by opening windows and doors (when weather permits) or by installing a mechanical ventilation system. However, in Denver’s dry climate, increased ventilation can also lead to lower humidity levels, which, as we’ve discussed, can exacerbate the problem.
Heat Recovery Ventilators (HRVs): HRVs are a more sophisticated ventilation solution that can provide fresh air without significantly impacting humidity levels. They work by exchanging heat between incoming and outgoing air, minimizing energy loss. This is a good option for Denver homes that need improved ventilation without sacrificing humidity control.
Radon-Resistant New Construction: If you’re building a new home in Denver, consider incorporating radon-resistant construction techniques. These techniques include installing a vapor barrier beneath the foundation, sealing cracks and openings, and providing a passive vent pipe system.
One common mistake Denver residents make is assuming that because their neighbor’s house has low radon levels, their house will too. Radon levels can vary significantly from house to house, even within the same neighborhood. Soil composition, foundation construction, and ventilation patterns all play a role.
Another pitfall is attempting DIY radon mitigation without proper knowledge or equipment. While sealing cracks and openings can be a DIY project, installing a soil depressurization system requires specialized skills and equipment. Improper installation can be ineffective or even dangerous.
Here’s a DIY tip for Denver residents: Regularly check your basement for cracks and openings. Use a flashlight to inspect the foundation walls, floors, and around pipes. Seal any cracks or openings you find with a high-quality sealant. This is a simple and inexpensive way to reduce radon entry.
For professional radon mitigation services in Denver, consider contacting companies like Radon Solutions of Colorado, or SWAT Environmental. Always verify that the company is licensed and certified by the CDPHE.
Remember, radon is a serious health hazard, but it’s also a preventable one. By testing your basement for radon and taking appropriate mitigation measures, you can protect yourself and your family from the risk of lung cancer. Don’t let the Mile High City’s hidden danger compromise your health. Take action today.