How to Use a Home Radon Detector

Radon is a naturally occurring radioactive gas emitted into the environment when the uranium in rocks, soil and water breaks down. Radon is a known carcinogen. The U.S. Environmental Protection Agency estimates that thousands of lung cancer deaths each year are attributable to high levels of the invisible, odorless gas in homes. A radon test kit is an easy and inexpensive way to determine if the level is safe in your home.

Difficulty: Moderately Easy

Instructions

1. Close all windows and doors 12 hours before testing.

2. Place the test kit at least 20 inches above the floor in the lowest living area of the home. The kit should be placed away from drafts and sources of heat and humidity.

3. Record the start time and date.

4. Leave the test kit in place for the designated length of time.

5. Record the ending date and time.

6. Seal the package and return the kit to the laboratory for analysis.

Tips & Warnings

• Testing should be done during cooler months but never during stormy, windy weather. Ideally, two short-term home radon tests should be conducted simultaneously to determine the average home radon level.
• Radon readings at or above the EPA action level of 4 pCi/L are considered unsafe. Corrective measures should be taken to reduce levels in the home. Radon test kits should be purchased from a qualified lab and must be used according to directions to achieve a reliable result. State radon offices and qualified radon professionals should be consulted for more information.

References

• Radon Information Center

Resources

• A Citizen's Guide to Radon