Denver, CO

At A-1 Radon Testing Company, we proudly offer professional radon testing in Denver, Colorado, and the surrounding metro area. As a locally trusted and fully certified radon inspection company, we help homeowners, homebuyers, real estate agents, landlords, and business owners protect their indoor air quality and meet EPA compliance standards.



Whether you live in a bungalow near Washington Park, a townhome in LoHi, or operate a commercial space in Cherry Creek, our team delivers fast, reliable, and affordable radon testing services tailored to Denver’s unique environment and real estate market.

Radon is an odorless, colorless radioactive gas formed from the natural breakdown of uranium in Colorado’s soil. It enters homes through foundation cracks, sump pits, and slab gaps—and can accumulate to dangerous levels without any visible warning.

Here’s why radon testing is essential in Denver:

• Colorado is designated a Zone 1 high-risk state by the EPA
  
• More than 50% of homes in Denver test above the EPA action level of 4.0 pCi/L
  
• Radon is the second leading cause of lung cancer in the U.S.
  
• Elevated levels are often found in both new and old homes, regardless of basement presence
  
  

At A-1 Radon Testing Company, we use advanced testing methods and EPA-approved equipment to detect radon quickly and accurately—so you can take action with confidence if needed.

We provide full-service radon testing and consulting to clients throughout the city of Denver and the greater metro area. Our testing meets real estate transaction requirements, Colorado Department of Public Health guidelines, and EPA safety standards.

Our services include:

• Short-term radon testing using continuous radon monitors (CRM)
  
• Real estate transaction radon testing with certified documentation
  
• Radon testing for homeowners and landlords
  
• Post-mitigation radon verification
  

Commercial and multi-family building radon assessments


With fast turnaround, affordable pricing, and expert reporting, our services are ideal for anyone looking to understand and improve their indoor air quality.

Our radon testing is non-invasive, fast, and fully certified. Here’s how it works:

• We place EPA-approved devices in the lowest livable area of your home or building
  
• The test runs for 48–96 hours, depending on EPA-recommended protocols
  
• We retrieve and analyze the data or send passive kits to a certified lab
  
• You receive a digital report with clear results, risk interpretation, and any mitigation recommendations
  
  

Need fast results? Ask about our same-day Continuous Radon Monitor testing options.

Schedule Radon Testing in Denver Today

Radon is an invisible risk—but testing for it is quick, affordable, and essential. Whether you're buying, selling, or simply safeguarding your family or tenants, A-1 Radon Testing Company is here to help.