Lasalle County Health Department offering free radon test kits for residents

LaSalle County Health Department – Studstill Media Photo

OTTAWA – The LaSalle County Health Department is encouraging residents to test the radon level in their home. Radon is a radioactive gas that occurs naturally in most soil. As radon travels through the soil, it can easily move through small spaces in a foundation and enter a building, where it becomes trapped and accumulates in the air.

Radon has no taste, smell, or color. Testing is the only way to find out if there is a dangerous level of radon in your home. The best time to test for radon is during cold weather when windows and doors are closed.

Most radon exposures occur in the home. When people breathe in radon, it damages the lungs, which can cause lung cancer. According to the Centers for Disease Control and Prevention (CDC), radon is the second leading cause of lung cancer after cigarette smoking. Radon can be found throughout Illinois and levels can vary from one home to another, even in the same neighborhood. It’s estimated more than 1,100 people in Illinois develop radon-related lung cancer each year according to the Illinois Emergency Management Agency (IEMA).

The Environmental Protection Agency (EPA) has established the radon action level at 4 picocuries per liter of air (4 pCi/L). At or above this level, it is recommended that corrective measures be taken to reduce indoor radon levels. Radon mitigation is the only effective way to reduce levels and decrease the risk of lung cancer. The most common radon reduction system involves the installation of a vent pipe and fan, which draws air from underneath a building and displaces it outside. The cost of a system varies depending on the reduction method chosen and building size. Radon is a preventable health threat through testing and mitigation.

According to the IEMA, approximately one in two homes tested in Illinois (45 percent of homes) have radon at or above the EPA action level of 4 pCi/L. In addition, the average Illinois indoor air radon concentration is 5.1 pCi/L. “With the presence of radon in this geographic area, we encourage residents to take advantage of this opportunity and test their homes for radon,” said Chris Pozzi, Director of Environmental Health at LaSalle County Health Department. Homeowners can test their homes with a simple kit. Testing is easy and convenient, taking 3-7 days. Tests should be done on the lowest level of the home that is frequently occupied.  Tests should not be done in kitchens, bathrooms, laundry rooms, or utility rooms.

Since 2019, LaSalle County Health Department has given out 121 test kits. Sixty-seven of those test kits have been submitted for analysis, for a 55% usage rate. Fifty-seven have produced valid results, with 19 having a result above 4.0 pCi/L. The average result in LaSalle County has been 4.52 pCi/L. Testing homes for elevated levels of radon is simple and inexpensive. And, if discovered, a radon problem can be fixed with a mitigation system.

LaSalle County Health Department, through a grant from the IEMA, has free radon test kits available to residents of LaSalle County. Test kits can be picked up at the health department during regular business hours (Mon.-Fri., 8:00 a.m. to 4:30 p.m.) at 717 E. Etna Road in Ottawa. A staff member will assist you with the instructions on using the test kit, as well as provide information regarding radon, radon measurement, and radon mitigation. Additionally, should your radon test results show a high level of radon in your home, the health department can provide you with a list of licensed radon measurement professionals and licensed radon mitigation professionals for follow-up. Call the LaSalle County Health Department at (815) 433-3366, for more information on radon test kits.

Additional Resources:

Visit to view a testing kit instructional video.

Visit the link below to see the estimated radon risk for each county on this interactive map.

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