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  Radon Program  


* Radon Dine' Presentation    



 What is Radon?

Radon is a colorless and odorless gas that is present indoors and outdoors. In 1990, the National Safety Council conducted a study on the effects of this naturally occurring gas. It is estimated that radon can cause 7,000 to 30,000 cancer related deaths each year. Due to its harmful effects, radon is the second leading cause of lung cancer, next to smoking.


Our Goal

The goals of the Navajo Nation Environmental Protection Agency's Radon Program is to ensure all homes and tribal offices be tested at least once and all schools and day cares to be tested yearly. From the Ground to our Homes, Schools, and Offices. Radon comes from uranium. Uranium is found in soil and rock, such as phosphate, pitchblende, shale, and granite. As uranium decays, it produces radium. In return, decaying radium produces radon. Radon gas travels upward from the ground and enters buildings and homes through dirt floors and through cracks in the foundation and basement. Radon also travels through drains, walls, and other openings where it is trapped. Radon in the outside air is in very low concentrations and is not a problem. It can also come from your water, if you water is supplied by a well. If a well serves as your water source and your home has been tested to have a level of 4 pci/l or higher, you might consider having your water tested. Why is Radon Harmful?



Radon is a colorless, tasteless, odorless, radioactive gas.

How does radon get inside the home?

Radon gets through: Cracks in solid floors, construction joints, cracks in walls, gaps in suspended floors, gaps around service pipes, cavities inside walls and the water supply.

Radon is a radioactive gas, making it harmful to our bodies. Long-term exposure to radon, in small or large amounts, can develop into lung cancer. Decaying radon releases tiny radioactive particles that can be inhaled. These particles attach to lung tissue and cause damage, resulting in lung cancer. The chances of developing lung cancer are increased.


How much Radon is Safe?

Radon is not safe, in any amount or at any level. The recommended action level for radon is 4 pCi/l. Level of radon vary greatly from place to place; the only way to know the radon levels in a building is to test.    

Radon Health Effects  

As you breathe radioactive alpha particles enter your lungs & mutate your DNA thus causing Lung Cancer.



*Classified scientifically as a Class A carcinogen.

*Second leading cause of lung cancer after tobacco smoke.      

*It is responsible for approx. 21,000 deaths per year.

*Highly toxic to elderly and young children.

*Smoking increase your chances of getting lung cancer, as well as others living in the home.

 How Can We Help?

The Radon Program, a division of the Navajo Nation Environmental Protection Agency, is dedicated to informing the public about Radon and its health effects. The program conducts routine tests in the area schools and tribal buildings. Tests are also administered in private homes at the request of the homeowner.

Short-Term Radon Test Kit(s) 3-7days                                  Long-Term Test Kit(s) more than 90days

*Easy to do


*NNEPA gives them away free


The test kits used by our program are the charcoal canister devices (short-term testing) and the alpha-track detectors (long-term testing). The charcoal canisters provide relatively quick results and the alpha-track detectors provide a more accurate average of the Radon concentration in a specific area.    

Radon: Silent, but DEADLY


1. Test your home

2. Reduce your exposure

3. Spread the word


EPA recommends


1. Test your home for radon.

2. Fix your home if your radon level is 4 picocuries per liter (pCi/L) or higher

3. Radon levels less than 4 pCi/L still pose a risk, and in many cases it can be reduced. *BUT, there is no safe level. Lower is better.

4. Mitigating your radon home.




-Mitigation is making the radon go around or through the house instead of entering the house or Soil Depressurization.

-Active Soil Depressurization systems consist of a plastic pipe extending form the soil to a point above the roof, with an in-line fan which generates a slight "vacuum" in the soil and draws the radon into the system rather than allowing it to enter the house.

This approach works because the soil "sucks" on the house, rather than the house "sucking" on the soil.




If you would like to get more information about our community Outreach at local Chapter Houses or Schools, please call us at (928) 871-6813.

Navajo Nation Area Radon Level


We are still in the testing phase of Community Radon Results.


PDF Radon Map

Find Your Community Radon Results
Click Here (PDF) LINK to USEPA radon levels map USEPA Radon-Frequently Asked Questions page


For more information contact us at:      


NNEPA - Radon Program

Window Rock, AZ

Phone: (928) 871-6813

Fax: (928) 871-6757


Or The National Radon Hotline at 1-800-SOS-RADON