Radon Testing and Mitigation for Apartment and Multifamily Buildings

Why is my apartment testing for radon?

An apartment may be tested because the owner is assessing indoor conditions, responding to a resident or preparing for a transaction or financing review. The presence of test equipment does not mean an elevated result has already been found. Ask management for the project purpose and written occupant instructions.

Residents can help the measurement proceed by leaving equipment in place and following the stated conditions. If a device is moved or access is interrupted, tell the project contact. A transparent record is more useful than trying to conceal a problem that may require another measurement.

• Ask when equipment will be placed and retrieved.
• Identify the contact for a disturbed device.
• Follow the supplied window and ventilation instructions.
• Ask how and when results will be communicated.

Does HUD require radon testing?

HUD radon requirements depend on the financing or assistance program and the project. The Multifamily Accelerated Processing guide includes radon evaluation, applicable testing and mitigation provisions. That is not the same as saying every apartment in the country falls under one HUD testing rule.

Give the contractor the specific program, transaction stage and written requirements from the lender or environmental reviewer. Confirm the current standard, professional qualifications and required documentation before work starts. Air Sense's general multifamily service listing is not a claim of experience with your particular HUD program.

• Identify the HUD or lender program by name.
• Provide the reviewer's scope and due date.
• Confirm qualifications and required standard edition.
• Agree on reports and any follow-up deliverables.

Are landlords required to test for radon?

Landlord duties depend on the jurisdiction, property and applicable program. Illinois has specific radon information and disclosure provisions for tenants in units below the third story. IEMA-OHS explains the required materials and circumstances involving tenant testing and responses. Consult that guidance and qualified legal advice for a particular tenancy.

A disclosure duty should not be confused with a universal statement that every landlord must conduct the same test on the same cycle. For Missouri properties, review the lease, local requirements and any financing conditions. This page does not decide an owner's obligations or a tenant's remedies.

• Keep applicable disclosure materials with the leasing file.
• Retain test reports for the correct unit and address.
• Have property-specific legal questions reviewed promptly.

What happens if radon is found in an apartment?

When an apartment test identifies elevated radon, management should review the complete report and arrange a qualified assessment of the next step. The response should address the measured locations and the building layout, with clear communication to affected residents. A neighboring unit's result is not a substitute for the unit being evaluated.

Ask the proposed contractor to distinguish assessment, mitigation and follow-up testing in the scope. Plan how staff will reach occupied units, who will notify residents and where the final records will be stored. Keep each location identifiable through the project so results are not accidentally assigned to the wrong unit.

For a St. Louis multifamily project, call Air Sense at 314-664-9807 with the unit count, plans and any existing report. Confirm the project fit and reporting needs before relying on a schedule.

• Record unit and device identifiers consistently.
• Coordinate access with property management.
• Define follow-up measurements in the proposal.
• Keep a building-level record of completed work.