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Radon comes from the natural radioactive breakdown of uranium in soil, rock, and water. It is an invisible, odorless, tasteless, cancer-causing gas that enters buildings through the numerous cracks, holes, and pipes in the foundation. It can also enter a building from well water.

Radon can be found in any building, but homes are the most concerning since that is where families spend the most time.

CloudBreak Advisory offers  a reliable and economical radon measurement as part of a real estate transaction or for homeowners that want to be informed about the radon levels in their home.

With a Radon Measurement Professional certified by the National Radon Proficiency Program (NRPP) you can ensure that an accurate test  of the home's radon potential will be performed according to ANSI-AARST Standard Protocol for Conducting Measurements of Radon in Homes.



Measurement and Reporting - What to Expect

Radon is a colorless, odorless radioactive gas that may be harmful to humans. Radon testing measures radioactive events per liter of air, known as picocuries (pCi/L). While any radon exposure creates some risk to health, the Environmental Protection Agency recommends remedial actions to reduce radon be taken at the level of 4 pCi/L or higher.

CloudBreak radon testing service adheres to the industry standards and requirements set by AARST/NRPP:

  • In general, the test will require 12 hours of "closed house" conditions prior and during the minimum 48 hour testing period.

  • Rigorous QA/QC developed per NRPP/AARST requirements to ensure accurate, precise, and unbiased measurements that are reliable for the client.

  • The testing equipment enables CloudBreak to monitor the testing progress via an iPhone app and can also determine if any interference with the test or device may have taken place during the testing period.

A formal analytical report will be delivered to the client within 48 hours of the end of the test and will provide discussion as to the interpretation of the results and the recommendation for mitigation if the measurement meets or exceed the current EPA standard for indoor radon levels (4 pCi/L or greater).



More often, informed buyers are having radon tests performed when purchasing a home. Discovering elevated radon concentrations doesn’t mean you need to walk away from the deal! Testing for and mitigating radon is easy and affordable.

At the time of resale, it is important to know what the radon exposure risk could be, independent of how someone else operates or lives in a home. Reliable testing devices and methods exist and are readily available to determine indoor radon levels.

Section K of the Environmental Conditions portion of the Colorado Seller’s Property Disclosure Form specifically lists radon as a hazard that, if known by the seller to exist or ever have existed, must be disclosed. This is true even if previous test results were less than 4 pCi/L. In all cases, sellers should provide copies of any test results to potential buyers.

Are you a Radon Aware Real Estate Professional? Find out more here!


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Testing is the only way to know if you and your family are at risk from radon. EPA and the Surgeon General recommend testing all homes below the third floor for radon. Testing is inexpensive and easy and it should only take a few minutes of your time. Millions of Americans have already tested their homes for radon. In addition, the Colorado Department of Public Health and Environment reports that over 31,000 radon tests were conducted in Colorado in 2016.

When should you test for radon?

(AARST/ANSI 2014 Protocol for Conducting Measurements of Radon and Radon Decay Products in Homes):

  • Every 5 years

  • Between 24 hours and 30 days of installation of a mitigation system

  • New addition construction or significant renovation

  • A ground contact area not previously tested has been occupied or a home is newly occupied

  • Heating or cooling systems are significantly altered that would result in the change of air pressure or distribution

  • Ventilation is significantly altered due to extensive weatherization or changes to mechanical systems

  • Significant openings to soil occur due to:

  • addition of groundwater or slab surface water control systems (sumps, drain tiles, tub/shower retrofits, etc).

  • natural settlement causing major cracks to develop

  • Earthquakes, construction blasting, formation of nearby sinkholes

  • An installed mitigation system is altered or repaired


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While radon measurement certification is not yet required in Colorado , CloudBreak has completed classroom study, successful examination, and testing device calibration performance certification to obtain the National Radon Proficiency Program (NRPP) American Association of Radon Scientists and Technologists (AARST)/  Measurement Certification:

  • Certification with AARST/NRPP is the only way to ensure that test is performed according to ANSI-AARST Standard Protocol for Conducting Measurements of Radon in Homes.

  • 16 Hours or Continuing Education Hours every two years

  • Annual testing equipment calibration


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Frequently Asked Questions:

Q: What is Radon?

A: Radon is a naturally occurring, radioactive gas that you can't see, taste or smell. It is produced by the breakdown of uranium in soil, rock and water.

High levels of radon have been found in all 50 states.

Indoor radon is the second leading cause of lung cancer after smoking. Radon causes an estimated 7,000 to 30,000 lung cancer deaths each year. A combination of smoking and high levels of radon in your house increases your risk.

Q:How Does Radon Get Into My Home?

A:Radon enters homes most commonly through: cracks in foundations;

openings around sump pumps and drains; construction joints; cracks in walls; crawl spaces; and in some cases from well water.

Radon is usually most concentrated in the lowest level of the home.

Radon may also be present in well water and can be released into the air in your home when water is used for showering and other household uses. Radon entering homes through water may be a small risk compared to radon entering though the soil.

Q: Are scientists sure radon really is a problem?

A:Although some scientists dispute the precise number of deaths due to radon, all major health organizations (like the Centers for Disease Control, the American Lung Association and the American Medical Association) agree with estimates that radon causes thousands of preventable lung cancer deaths every year. This is especially true among smokers, since the risk to smokers is much greater than to non- smokers

Q: Does radon only affect certain kinds of homes?

A:House construction can affect radon levels. However, radon can be a problem in homes of all types: old homes, new homes, drafty homes, insulated homes, homes with basements, homes without basements. Local geology, construction materials, and how the home was built are among the factors that can affect radon levels in homes.

Q: My neighbor just had a radon test done and their levels were low. This means that I likely will have low levels in my home too, right?

A: It’s not. Radon levels can vary greatly from home to home. The only way to know if your home has a radon problem is to test it.

Q: Is it difficult to sell homes where radon problems have been discovered?

A:Where radon problems have been fixed, home sales have not been blocked or frustrated. The added protection is sometimes a good selling point.

Q: I’ve lived in my home for so long, it doesn’t make sense to take action now.

A: You will reduce your risk of lung cancer when you reduce radon levels, even if you’ve lived with a radon problem for a long time.

ouse increases your risk.