Who Can Test for Radon?

The resident of the home may test or mitigate their own residence, or hire a licensed professional. Licensed professionals are recommended for real estate transactions.

Where do you find an Illinois licensed professional to measure for radon?

Contact the Illinois Emergency Management Agency at 800-325-1245 or
http://www.state.il.us/idns/html/radon/radon.asp

The professional will perform a short term test which lasts 2-7 days. A test must last for a minimum of 48 hours.

The Measurement Professional will test each of the lowest structural areas of the home. If your house has one or more of the following foundation types:
basement (test in the basement), crawl space (test the room above the crawl space) , and slab-on-grade (test in a room with the slab-on-grade foundation), all three areas must be tested.

When testing, should the house be closed up?

When testing the house, all windows and doors must be closed except for normal entry and exit. Do not operate fans or other machines, which bring air in from outside (except fans that are part of a radon reduction system, or small exhaust fans that operate for only short periods of time.)

Where should the professional place the detector?

Choose a place where the detector will not be disturbed.
Place the detector three feet from doors and windows to the outside, twenty inches to six feet above the floor, and four inches away from any other objects [see image below].

Where should the professional avoid placing the detector?

In kitchen, laundry room, or bathroom since humidity may affect some detectors, in crawl spaces, and on the floor or by cracks in wall or next to the sump pump. These locations could cause a false high reading.

What d0 the results mean?

If your results are less than 4 pCi/L, the USEPA Action Level, no action is needed, however, the buyer should consider retesting in two years.

What if results are over 4 pCi/l?

When results are over 4pCi/L, the recommendation is to contact a licensed mitigation contractor to reduce radon levels in the home below 4 pCi/L.

© University of Illinois Board of Trustees. http://www.takeactiononradon.uiuc.edu