What to expect during a radon test
Where the test goes, how to keep your home closed up, and what to do while it runs.
Short guides for each step: getting ready for a test, reading your result, picking a test, and getting a system put in.
Haven't tested yet? Cook County homes can get a free kit, and Will County kits are $8. Our testing guide shows how to get one. The five guides below are in the order most people need them. Skip ahead if you already have a result or an install date.
Buying or selling a home? The state radon office, IEMA-OHS, puts out the seller pamphlet and the radon hazards disclosure form.
Already have a high number? Call Bill at (815) 370-9682 or send your info for a quote. That number is Bill's cell phone. Calls Mon-Sun, 7 a.m.-7 p.m. Texts, photos, and forms can be sent anytime. Our price ranges are on the cost page. The services page covers a new system, passive activation, and fan replacement. New to radon? Start with what is radon. Everything else is in the radon knowledge base.
Where the test goes, how to keep your home closed up, and what to do while it runs.
What pCi/L means, where the EPA draws the line, and what to do if your number is high.
How long each test runs, what each one tells you, and the extra rules when a home is being sold.
How a radon system works, what the install involves, what Illinois requires, and what to do once it is running.
Most installs are done in one visit. Here is the timeline from your first call to a running system, and what the crew does that day.
These are the towns our crew works in. Each one has its own page.
Last reviewed by American Radon Systems: October 10, 2026
EPA recommends fixing a home at 4 pCi/L or more, and considering a fix between 2 pCi/L and 4 pCi/L.
Official Illinois materials for radon testing guidance in a real estate transaction.
Illinois radon program information for homeowners.