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Radon is a natural radioactive gas that is a decay product of uranium. Radiation from radon and its decay products is the second leading cause of lung cancer in the world — surpassed only by smoking. Radon usually enters a home through its basement, foundation, or crawl space, and collects in the lower levels of a home. It is critically important for a homeowner or homebuyer to know whether your home or prospective home contains high concentrations of radon.

Environmental Inspection Services National Radon Proficiency Board-certified measurement providers can precisely measure radon concentrations in your home. Our inspector sets an electronic device that remains in place while the test runs, for 48 to 72 hours. The results are available when we retrieve the device. If radon is found, we will describe methods and costs for mitigation.

The amount of radon in your home does not depend on the age of the house but on the type of construction and on the structure’s underlying geology.

The EPA advises that radon testing is only necessary if you live on the third floor or below.

No. EPA protocol is to place the device in the lowest habitable room in your home. A second or third device and measuring area may be necessary depending on the size and layout of your home.

Yes. Kits are available in hardware stores and online. However, if you want an impartial, expert radon test then we will provide it.

Environmental Inspection Services employs Sun Nuclear Corporation 1027 continuous radon monitors, the latest in radon detection instrumentation. These electronic monitors continuously test the air in your home over a 48 to 72 hour period.

As per EPA regulations, our radon tests run 48-72 hours.

To preclude any conflict of interest, we provide radon testing but not radon remediation. We do, however, provide a complete description of possible appropriate mitigation designs for you to employ along with post-mitigation radon testing.

No. Radon shows up in various places, not all contiguous.

There are areas that have had a higher number of homes that test positive for radon. Link. Environmental Inspection Services recommends that you test for radon if you live on a hillside or in the Palos Verdes area.

Since radon contamination is usually more concentrated in lower levels of the home, we suggest radon testing if you plan to convert a basement even if you’ve previously tested for radon in the main house.

Possibly, but studies show that the low amount of radon in a granite countertop is highly unlikely to present a hazard to you or your family.


For more information go to the State website. http://www.cdph.ca.gov/HealthInfo/environhealth/Pages/Radon.aspx