Test Every Two Years


We Do NOT Perform
Radon Testing.

All areas of northern Illinois can have high radon levels, and all buildings should be tested every two years, Due to Illinois state regulations, radon mitigation companies like us, cannot provide radon testing services on homes we mitigate or plan to mitigate, but testing can be performed by a professional or the building resident using a reliable radon gas testing kit.

Professional testing is usually required for real estate and refinancing transactions. It usually takes a few days and costs $100- $300 per home. Self-test kits are usually $35-$65 each and are available for approximately $39 in local home centers and hardware stores.


Professional Testing

Get a free, no obligation mitigation system design

We are Not
Testing, Inc.

We are often confused with DuPage Radon Testing. If radon testing determines that you have high radon levels, then give us a call.

Locating Professional

Look for radon testers thet are certified by the Illinois Emergency Management Agency (IEMA) and carry business and worker's compensation insurance. Click here for state Licensed Testers or choose from the list below.

  • Amy Murphy

    Jim East

    Karen Weber

    Kathy Cook

    Dan Herring

    Karen Claus

    Martin Gisler

    Bruce Fisher

    Robin Lawson

    Richard Routson

    Ron Bowers

    Tony Ross

    Ken Jacobson

    Eric Williams

    Andrew Wilkerson

    Donna Ybarra

  • DuPage Radon Testing, Inc

    Reliable Radon Inspections, Inc

    Radon Detection Specialists

    The Brickkicker

    Sheridan Building Inspections

    RKC Inspections

    Radon by Regency

    White Glove Building Inspections

    L a w son Home Pro Inspection

    DuPage Residential Inspection

    Radon Testing

    Alta Inspection Services

    Speaker of the House

    Pro Home Radon Measurements

    Elite Inspection Services

    Midwest Radon Detection

  • Warrenville


    Burr Ridge









    Downers Grove

    Glen Ellyn




  • 630-225-7997
















Self Testing with a Radon Test Kit

Home Kits

Home centers and hardware stores often carry home radon test kits for $35-$65, including lab fees. If you choose the home testing option, be sure to follow the directions carefully.

About Testing

What To

Radon detectors come in various styles. Typically, they are placed in a location a few feet above the ground and away from heat vents and exit doors. The detectors usually need to sit undisturbed for several days. Typically, you need to adhere to “closed door” procedures during the test. After the correct amount of time, the detector is the sent to a lab or collected by the professional to obtain the final results of the radon test.

One Test
per Area

Buildings with multiple foundation types (basements, crawlspaces, and slab-on-grades) usually require a seperate test for each area. Each detector is placed in the lowest living space. For buildings with basements, this is in the basement; for crawlspaces, it is placed in the living space above the crawlspace. For slab-on-grade areas, it is placed on the first floor level.


Don’t worry, you can still come and go. The closed building procedure just means that doors and windows are kept shut except as needed to come and go. Other conditions are maintained, such as not using the fireplace.


Warm air rises. When warm air rises in a building, it will push aganinst the upper ceiling and out through various cracks in the ceiling. This causes a suction effect at the bottom of the building, known as the stack effect. This stack effect has been shown to actually pull radon into the building.


You may lose. Studies have shown that because of the stack effect, when people open windows or prop doors open during a radon test, the radon level can actually go up.

Did you Know...?

  • 4.0 Magic Number

    The EPA’s suggested action level is 4.0 pC/iL. This means that any radon levels at or above 4.0 should have a radon mitigation system installed to remove the radon. This the same level used as a decision point for most real estate transactions .

  • Not So Magic?

    While 4.0pCi/L is the level used most often, there is no true “safe” level of radon. The World Health Organization uses 2.7 as their action level. Levels below 1.0 are sometimes very hard to reach with a radon mitigation systems, but levels below 2.7 are frequently achieved.

  • Levels Drop Every Floor

    As a general rule of thumb, radon levels tend to drop by half for each floor above the lowest level of the building. For instance, a 12.0 pCi/L reading in the basement is likely to produce a reading of about 6 on the first floor and a reading of about 3 on the second floor. However, many factors can affect this and radon test results may vary.

  • Changes Year by Year

    Every two years, you should check your radon levels. Radon levels can change dramatically over the years. A deposit of Radium in your soil may be on the verge of its next decay step, and could produce radon in large amounts in the near future.

  • Goals Depend on Use

    If you are selling your property, a level of 4.0 should be your guideline. If you are staying in the building, consider how you use your lowest level. If people spend a lot of time there, especially sleeping or sitting, or if children frequently play in this area, you may want to ask our System Designer about reaching a lower number, perhaps under 3.0 pCi/L.

  • Ambient Numbers

    To get a feel for how your radon level compares, consider this: the level of radon that you might experience while walking outdoors in northern Illinois usually ranges from below 0.5 to 2.0 pCi/l.

  • High Numbers

    To further build a reference, radon levels in northern Illinois over 50.0 are very rare. Readings over about 25.0 are considered very high, and readings under 10.0 are the most common.

  • Weather’s Impact

    Weather can affect radon test results, but usually only slightly. Professionals know when to alter their procedures due to severe weather conditions.

  • What Our Customers Say