Illinois radon mitigation license RNM2018212. Mokena, Will County.
Radon mitigation in Mokena
Mokena is Will County, which makes the first step an $8 kit from the Will County Health Department. Three offices sell it, in Joliet, Bolingbrook, and Monee, and the price includes the lab and the written report. If you would rather watch the level all year, a reusable detector will.
Text Bill the number and he’ll tell you what it means, free. At or above 4.0, he comes out, looks at the basement and the sump, checks any builder pipe, and gives you the price. The Dahlstroms have lived in the Lincoln-Way area since 1999, so Mokena is an everyday drive.
Passive pipes in newer Mokena homes
Under the Radon Resistant Construction Act, 420 ILCS 52, every new one-family or two-family home in Illinois built since June 1, 2013 has come with passive radon piping. If your Mokena utility room has a labeled pipe and no fan, that pipe is not proof the level is low. Test first. If the result is at or above 4.0, Bill looks at the pipe and tells you whether activation fits.
Mokena homes
Mokena homes are a lot like New Lenox and Frankfort homes: basements, sumps, and an outside pipe that needs to look clean when the job is done. Mokena is one of the everyday roads between Route 30 and I-80.
Mokena’s own count in the IEMA layer
The IEMA filter returns 698 Mokena tests that are valid and carry no mitigation system, as of our 14 October 2026 count, all of them Will County. Half the results fall above 3.0 pCi/L and half below, and 37.4% were at or above 4.0.
Frankfort next door is 1,009 tests with a 2.9 median and 36.9% at or above 4.0. The two towns sit close on the page and still are not interchangeable. Will County overall is a 3.5 median from 27,611 tests.
Three in eight
About three of every eight Mokena tests in the file reached the action level. County-wide it is closer to nine in twenty, so Mokena runs a few points under Will County, and about double the share on the Cook County side of Tinley Park, one town northeast. That is a description of 698 past tests, not a forecast. The neighbor with a 1.5 and the neighbor with a 9.0 can share a fence.
Nearby pages
Mokena pages on either side:
Mokena questions
Why is Mokena’s median 3.0 if Frankfort’s is 2.9?
They are separate sets of tests. Mokena has 698 valid Will County tests in this filter. Frankfort has 1,009. A tenth of a pCi/L between the medians is not a reason to skip a test in either town.
The builder left a pipe in the Mokena utility room. Is the home done?
The pipe is passive until a fan is added by someone licensed to do it. Test the home. If the result is at or above 4.0, activation starts with a look at that pipe.
Who tests a Mokena home for a sale?
An Illinois-licensed measurement professional does the test the contract asks for. Bill handles the mitigation side and can explain the result when it comes in.
Where can I get a radon test kit in Mokena?
Mokena is Will County. The Will County Health Department sells an $8 kit at its Joliet, Bolingbrook, and Monee offices, lab and report included. Pick it up, set it out as the instructions say, and mail it in.
Sources
- IEMA-OHS Public Radon Dashboard
Mokena, counted 14 October 2026: 698 valid Will County tests, median 3.0, 37.4% at or above 4.0. No mitigation system on these records.
- IEMA-OHS, Radon in Illinois
IEMA’s radon page for Illinois homeowners, Mokena included.
- Will County Health Department, radon program
Where a Mokena address buys the $8 kit.
- EPA, radon action level
EPA on the 4.0 pCi/L action level.
- Illinois Radon Resistant Construction Act, 420 ILCS 52/20
Section 20, effective June 1, 2013 under P.A. 97-953: all new residential construction in Illinois includes passive radon resistant construction. The Mokena builder pipe comes from this section.