Radon FAQs for Colorado Homeowners
Clear, honest answers about radon testing, mitigation, safety levels, and financial options in the Denver Metro Area.
We believe in education, not scare tactics. Below you’ll find clear answers to the most common radon questions from Denver homeowners.
Serving Denver, Aurora, Lakewood, Centennial & surrounding areas.
About Radon
Radon is a naturally occurring radioactive gas that forms in soil and rock. It is invisible, odorless, and can only be detected through testing.
Radon is common in Denver homes because Colorado’s soil contains higher levels of uranium. Changes in air pressure between your home and the ground can pull radon gas inside through cracks in the foundation, crawlspaces, and sump pits.
Nearly half of homes in Colorado test above the EPA action level of 4.0 pCi/L — which is why testing is strongly recommended.
Long-term exposure to elevated radon levels is the second leading cause of lung cancer in the United States, after smoking. The risk increases over time and with higher concentrations. Testing and, if necessary, mitigation significantly reduce that risk.
Radon rises from the soil and can enter homes through small openings in the foundation, including cracks in floors or walls, construction joints, sump pits, pipe penetrations, and crawlspaces. Even well-built homes can have elevated radon levels due to soil conditions beneath the property.
Medición de radón
The only way to determine your radon level is through testing. Professional radon testing provides accurate, reliable measurements and clear results so you can make informed decisions about your home.
The EPA recommends taking action if radon levels are 4.0 pCi/L (picocuries per liter) or higher. Even levels between 2.0 and 4.0 pCi/L may warrant consideration for mitigation, depending on the situation.
There are two main types of radon tests:
• Short-Term Testing
Typically lasts 48 hours to 7 days.
Provides a quick snapshot of radon levels and is commonly used in real estate transactions.
• Long-Term Testing
Lasts 90 days or more.
Provides a more accurate yearly average and accounts for seasonal variations.
At AirSafe Radon Solutions, we use certified and calibrated equipment to ensure accurate, reliable results.
Mitigación de radón
Radon mitigation is a system designed to reduce radon levels inside your home.
The most common method is called Active Soil Depressurization (ASD). This system uses a pipe and fan to safely draw radon gas from beneath the home and vent it above the roofline, preventing it from entering living spaces.
It is safe, effective, and widely used across Colorado.
Most installations are completed in one day. We work efficiently while maintaining high installation standards and clean workmanship.
When properly installed, radon mitigation systems can reduce radon levels by up to 99%.
Most homes see levels reduced well below the EPA action level of 4.0 pCi/L.
After installation, a follow-up test is performed to confirm the system is working properly.
Real Estate & Radon
In Colorado real estate transactions, radon disclosure is mandatory. Sellers must provide the state-approved radon disclosure form, any known radon test results, and the official radon information brochure.
A standard real estate radon test runs for 48 hours, in compliance with EPA guidelines.
Results are delivered promptly after the test period, providing the information needed to keep inspections, negotiations, and closing on schedule. The process is efficient and designed to minimize disruption during the transaction.
Yes. We regularly work with real estate professionals across the Denver Metro Area.
We provide:
Fast scheduling
Certified testing
Clear, easy-to-understand reports
Reliable communication
Our goal is to support smooth, stress-free transactions.
Crawlspace Encapsulation
Crawlspace encapsulation seals the area beneath your home with a durable vapor barrier to control moisture, soil gases, and outside air.
It typically includes sealing vents, gaps, and exposed soil to create a cleaner, more controlled environment.
In homes with crawlspaces, exposed soil can allow radon to enter more easily.
Encapsulation reduces soil gas entry and improves the performance of radon mitigation systems by supporting better pressure control.
Encapsulation can help:
Reduce moisture and mold risk
Improve indoor air quality
Increase energy efficiency
Protect structural components
Sump Pumps
A sump pump removes excess groundwater from basements or crawlspaces to help prevent flooding and moisture damage.
Unsealed sump pits can allow radon to enter. Proper sealing and integration are important for effective radon mitigation.
Yes. We provide professional installation and replacement, ensuring proper performance and integration with radon systems.
Financial Assistance
Colorado offers financial assistance programs for qualifying homeowners. We can help you understand available options.
LIRMA is Colorado’s Low-Income Radon Mitigation Assistance Program for eligible homeowners whose homes test above the EPA action level.