Illinois radon mitigation license RNM2018212. Oak Forest, Cook County.
Radon mitigation in Oak Forest
Oak Forest is suburban Cook County, and the Cook County Department of Public Health mails a radon kit free to any address that requests one. Put it in the lowest lived-in level, send it back, and read the lab report. A reusable detector gives you a number without the mail.
Text Bill the number and he’ll tell you what it means, free. A high result means Bill drives over from Tinley Park, looks at the ranch, the addition, or the slab you actually have, and gives you the price. New-system work is usually scheduled within a week or two.
Ranches, additions, and the foundation you have
Oak Forest has ranches, raised ranches, and additions that changed the foundation. Some homes sit on a slab, where the suction point and the routing take a little more thought. The design follows the foundation you have, not a town average. Bill looks before he prices.
The lowest median on this site, and 32 high tests
Oak Forest has the lowest median of the twelve towns this site counts with the same filter, and it is not a free pass. The IEMA layer holds 187 valid Oak Forest tests with no mitigation system recorded, by our 14 October 2026 count. The median is 1.6 pCi/L. Thirty-two of the 187, 17.1%, were at or above 4.0.
Cook County overall is a median of 2.0 and 21.5% at or above 4.0, from 61,276 tests. Oak Forest sits under both county figures. Tinley Park’s Cook County set, next door, is a median of 1.9 from 786 tests. Close towns, different counts.
About one in six
Thirty-two of 187 is about one Oak Forest test in six at the action level; Cook County runs about one in five. A 1.6 median means the typical Oak Forest result was well under 4.0, and it also means half of the 187 results were above 1.6. Thirty-two households in a town this size found a number worth fixing. The slab ranches and additions that make Oak Forest work interesting do not show up in the county figure at all.
Nearby pages
Oak Forest pages for the towns beside it:
Oak Forest questions
If the Oak Forest median is 1.6, can I skip the test?
The median is the middle of 187 tests. 32 of them were at or above 4.0. Test the home you sleep in.
Do you come to Oak Forest from Tinley Park?
Yes. Tinley Park is home base, and Oak Forest is a regular drive. New-system work is usually scheduled within a week or two.
Where can I get a radon test kit in Oak Forest?
Oak Forest is suburban Cook County, so the county health department will mail you a kit at no charge. Order it on the Cook County site. A reusable detector is the no-mail option.
Our Oak Forest ranch has an addition. Does that matter?
It is one of the things Bill looks at, and it is common here. An addition often sits on its own foundation. Sometimes that changes the job and sometimes it does not.
Sources
- IEMA-OHS Public Radon Dashboard
Oak Forest, counted 14 October 2026: 187 valid Cook County tests, median 1.6, 17.1% at or above 4.0. That is 32 tests at or above 4.0. No mitigation system on these records.
- IEMA-OHS, Radon in Illinois
IEMA’s radon page. Oak Forest is one of the suburban Cook towns on it.
- Cook County Department of Public Health, radon test kit request
The free mailed kit for Oak Forest.
- EPA, radon action level
The EPA action level the 32 Oak Forest tests met or passed.