Radon Testing


Callaway & Associates, Inc. is licensed by IEMA as a Radon Measurement Professional, license # RNI2002509. We perform in excess of 300 radon tests per year both residential & commercial.  


Callaway & Associates, Inc. performs residential Radon Testing & Radon Inspection Services using  Sun Nuclear Continuous Radon Monitors (CRM)  and or Rad Elec Electret Ion Chambers (E-Perms). Sun Nuclear continuous radon monitors take multiple readings per hour for up to 999 hours. They are equipped with tamper detection sensors to help identify any attempts to tamper with testing thus eliminating the false accusation of human interference with testing. These units eliminate the low and high bias associated with passive devices that are found with the do it yourself kits in hardware and home improvement stores.  E-Perms in their various configurations can perform tests from 48 hours up to a year long. Test results are delivered within 24 hours of the test completion..

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 results being delivered the same day the test is completed. 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. Test minimum duration is a 48 hour test, but a 96 hour or longer test is preferred if time is not an issue.  Testing not involved in a real estate transaction typically is for a 96 hour period and can be run for a longer duration if time is avaliable.  Test results are avaliable within 48 hours of test completion. 

In Illinois a homeowner is allowed to perform their own test in the dwelling in which they reside  This is for the single family owner occupied dwelling with no roomers or rented apartments space.  Callaway & Assocaites, Inc. as an Analytical Lab can supply you with the equipment needed to radon test your residence.  This is the same equipment that we use to do professional tests.  Results of the test are avaliable within 48 hours of the return of testing equipment.    


Schools & Daycare Centers

Radon Testing of Schools & Daycares can run from 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 avaliable within a week of test completion.

In Illinois a Home Daycare has two options for Radon Testing.  If you reside in the home, you may test with a "do-it-yourself" kit or you may hire an IEMA licensed Radon Measurement Professional.  Callaway & Assocaites, Inc. is also licensed as an Analytical Lab. and can provide you with the equipment needed to perform your own testing.  This is the same equipment that we use for our professionally performed testing.  Reslts are avaliable 48 hours after return of testing equipment.  




Commercial testing can run from the small retail store to mega malls and office buildings.  Often with multiple occupancies.  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.

Multi Family


Multi family housing units refinancing with HUD will need radon testing.  State of Illinois IEMA protocols will govern testing procedures in the State of Illinois.