Radon Testing and Mitigation for Rental Properties

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New Requirements

As of July 1, 2023, Montgomery County requires radon testing for multifamily (including condominiums) and single-family rental housing as well as disclosure and mitigation of radon hazards above a certain action level.

Montgomery County is among eight counties that have been designated by the U.S. Environmental Protection Agency as having the highest potential indoor radon levels in Maryland. Testing is the only effective way to determine high levels of radon exposure in a home.

General Radon Information

City of Rockville Radon Regulations -Effective 9/27/23

Sample Radon Lease Addendum (PDF)

Order a Radon Test Kit

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