Radon, Lung Health: Why Your Denver Basement Is Killing You

By Franklin Everett Shaw

March 15, 2026

Is your Denver basement harboring a silent threat? Radon, an invisible, odorless gas, is a significant health hazard, especially in Colorado. It’s the second leading cause of lung cancer in the United States, and Denver’s unique geology makes it a hotspot.

Ignoring radon is like playing Russian roulette with your family’s health. This isn’t fear-mongering; it’s a call to action, specifically tailored for Denver homeowners. Let’s dive into how you can protect your home and loved ones.

Radon originates from the natural breakdown of uranium in soil, rock, and water. Because Denver sits on the eastern edge of the Rocky Mountains, the uranium content in the soil is naturally higher. This means a greater potential for radon gas to seep into your home, particularly through cracks in the foundation, gaps around pipes, and other openings in your basement.

Testing is the first, crucial step. You have two primary options: DIY kits or professional testing services. DIY kits are readily available at hardware stores like Home Depot and Lowe’s in the Denver area, as well as online retailers. These kits typically involve placing a passive radon detector in your basement for a specified period (usually 2-7 days) and then sending it to a lab for analysis.

The cost of a DIY kit ranges from $20 to $50, plus lab fees. While affordable, DIY kits can be prone to errors if not used correctly. Placement is critical; avoid areas with drafts, high humidity, or direct sunlight.

Professional radon testing, on the other hand, offers greater accuracy and reliability. A certified radon tester will use specialized equipment to measure radon levels over a longer period (typically 48 hours) and provide a detailed report. This method minimizes the risk of false readings and provides a more comprehensive assessment of your home’s radon levels.

Professional testing in Denver typically costs between $150 and $300. While more expensive than DIY kits, the peace of mind and accuracy are often worth the investment. Consider it an investment in your family’s long-term health.

Colorado has specific regulations regarding radon testing and mitigation. The Colorado Department of Public Health and Environment (CDPHE) recommends that all homes be tested for radon. If radon levels exceed the EPA action level of 4 picocuries per liter (pCi/L), mitigation is recommended.

It’s important to note that Colorado law requires radon professionals to be certified. This ensures they have the necessary training and expertise to perform accurate testing and effective mitigation. Always verify a professional’s certification with the CDPHE before hiring them.

What happens if your radon test comes back positive? Don’t panic. Mitigation is a common and effective process. The most common mitigation technique is sub-slab depressurization (SSD).

SSD involves installing a vent pipe and fan system that draws radon gas from beneath the concrete slab of your basement and vents it safely outside. This prevents the radon from entering your home in the first place.

The cost of SSD systems in Denver typically ranges from $800 to $3,000, depending on the size and complexity of your home. Factors that influence the cost include the size of your basement, the type of foundation, and the accessibility of the area beneath the slab.

While SSD is the most effective method, simpler solutions can also help lower radon levels. Increasing ventilation in your basement by opening windows or using fans can help dilute the radon concentration. Sealing cracks and gaps in your foundation can also prevent radon from entering your home.

However, these methods are often insufficient to reduce radon levels below the EPA action level, especially in areas with high radon concentrations like Denver. They should be considered temporary measures or supplementary to a more comprehensive mitigation system.

One common mistake homeowners make is attempting to DIY radon mitigation without proper training or equipment. This can be ineffective and even dangerous. Radon mitigation requires specialized knowledge and techniques to ensure the system is properly installed and functioning correctly.

Another pitfall is neglecting to retest your home after mitigation. Retesting is essential to verify that the mitigation system is effectively reducing radon levels below the EPA action level. It’s recommended to retest your home within 30 days of mitigation and then every two years thereafter.

Here’s a step-by-step guide to testing and mitigating radon in your Denver home:

1. Test your home for radon. Choose either a DIY kit or professional testing service.
2. If radon levels exceed 4 pCi/L, contact a certified radon mitigation professional. Obtain quotes from multiple professionals and verify their certification with the CDPHE.
3. Have a mitigation system installed. Sub-slab depressurization is the most common and effective method.
4. Retest your home after mitigation. Verify that the system is working correctly and reducing radon levels below the EPA action level.
5. Maintain your mitigation system. Regularly inspect the system for any signs of damage or malfunction.

Finding a certified radon mitigation professional in Denver is crucial. Here are a few reputable companies:

• Colorado Radon Defense: Specializes in radon testing and mitigation services throughout the Denver metro area.
• National Radon Defense: A national network of certified radon professionals with a local presence in Denver.
• Accurate Radon Measurement: Offers comprehensive radon testing and mitigation services with a focus on accuracy and reliability.

Remember, protecting your family from radon is a proactive step you can take to ensure their long-term health and well-being. Don’t wait; test your Denver home for radon today. It’s a small investment that can make a big difference.