Who can test for radon in Illinois?
Illinois licenses professionals who provide radon measurement services. Confirm the named professional’s current measurement authorization through IEMA-OHS. Do not infer it from a mitigation credential or from a general statement that a company handles radon.
When contacting Air Sense, ask who will conduct the test at your Madison or St. Clair County address. Confirm the report provider, measurement locations and dates before relying on the appointment.
For a mixed-foundation home, explain which rooms are over a basement, crawl space or slab. Illinois real estate guidance addresses measuring the relevant lowest occupiable areas, including different foundation sections. Provide a sketch when the house has an addition.
- Request the professional’s full name.
- Verify the measurement license category.
- Describe every foundation section.
- Confirm who issues the report.
Is radon testing required in Illinois?
The Illinois home-sale disclosure rules do not by themselves require every seller to test or mitigate. Testing can still be requested as part of a transaction. Distinguish the statutory disclosure documents from the inspection terms in your purchase agreement.
For an Edwardsville buyer, the practical task is to coordinate the test with the inspection period. For a Belleville seller, it is to gather existing reports and provide the required information through the transaction process. A contractor should not interpret your agreement or promise that one document resolves every obligation.
If the property is a rental, child care facility or another regulated use, say so when requesting help. This residential page does not describe those separate rules. Ask the relevant agency or transaction professional which requirements apply.
- Identify the property’s use.
- Share the inspection deadline.
- Keep older reports available.
- Confirm any contract-specific requirements.
What is a good radon test result?
A lower measured concentration is preferable, and a result needs to be interpreted with its test conditions. Ask the measurement professional to explain the report and any appropriate follow-up. Do not treat a single number detached from its dates and location as a complete assessment.
Illinois guidance identifies 4.0 pCi/L as the action level. If a result warrants mitigation, request a property assessment and plan an independent follow-up measurement. Keep the system operating during that verification as directed.
For a Metro East home with a previous installation, send both the latest report and the system records. A functioning fan or pressure indicator does not itself measure indoor radon. Equipment information and air measurements answer different questions.
Call 314-664-9807 with the address, purpose and timing of the test. Ask to confirm measurement-provider details before a visit is finalized.
- Keep the complete report.
- Ask what additional measurement is appropriate.
- Retain post-mitigation results with house records.
Questions before you book
Can I arrange a test for a home I am buying?
Coordinate access and testing through the transaction parties. Confirm the measurement professional, test window and reporting deadline before scheduling.
Should I use the installer’s pressure gauge as the test?
No. A pressure indicator describes a system condition; it is not a radon concentration measurement.
Is an older seller report enough?
Review its dates, locations and conditions with your transaction and measurement professionals. Determine whether it addresses the house and decision as they stand now.