Giving you Peace Of Mind

Callaway & Associates, Inc. is licensed by IEMA (Illinois Emergency Management Agency a Division of Nuclear Safety) as a Radon Measurement Professional with Residential and Commercial certification, License # RNI2005209. We perform residential, commercial, multi-family housing and school radon testing.

Radon Testing is performed using Rad Elec, Inc. Electret Ion Chambers (E-Perms) and Continuous Radon Monitors (CRM).

Callaway & Associates, Inc. is licensed by IEMA (Illinois Emergency Management Agency) as a Radon Measurement Professional and is NRPP (National Radon Proficiency Plan) certified allowing for HUD multi-family testing.

There is no reason to fear radon; every building has some amount present. The question to be answered is what are the levels. The only way to tell is to test. A typical real estate transaction test will run for a minimum of 48 hours, with the preferred testing period of 96 hours being used if time permits, results being delivered within 24 hours of test completion. By having Callaway & Associates, Inc. perform a radon test, you can be assured that the test was performed by an IEMA licensed Radon Measurement Professional. Should elevated levels of radon be present, a mitigation system can be installed to reduce levels. Callaway & Associates, Inc. does not perform mitigation; we feel this a conflict of interest, but we will give you a list of State of Illinois Licensed Mitigation Contractors that do work in your area.

Building type


In Illinois, radon testing of a home for a real estate transaction must be performed by an IEMA Licensed Radon Measurement Professional. The minimum test period is 48 hours, but 96 hours is preferred if time is not an issue. Testing not involved in a real estate transaction is typically 96 hours and can be run for a longer duration if time is available. Test results are available within 48 hours of test completion.

In Illinois, a homeowner may test their own home if it is their place of residence. This cannot involve a real estate transaction. It is for single-family owner-occupied homes without boarders or apartments.

Multi Family

Multi- family housing units refinancing with HUD will need radon testing by a National Radon Proficiency Plan (NRPP) certified, State of Illinois Emergency Management Association Radon Measurement Professional. IEMA & HUD protocols will govern testing procedures in the State of Illinois.

Schools & Daycare Centers

Radon Testing of schools & day cares can run a minimum of 48 hours up to a year in length. The initial testing is usually a short term 48 hour to 7 day test depending on time constraints. Floor plans and at least one site visit is needed to assess testing equipment needs. Test results are normally available within a week of test completion.

In Illinois, if you run a home daycare, you have two options to test for radon:

1) If you reside in the home, you may perform your own radon test.
2) you may hire an IEMA Licensed Measurement Professional to test your home.


Commercial testing can run from the small retail store to mega malls and office buildings, often with multiple occupancy. Test duration for an initial test is usually 48 hours to 7 days. Follow up testing if needed is typical and generally only in areas that tested high. Test results are normally delivered within a week of test completion.