The Montgomery County, Maryland, Department of Environmental Protection notes that effective July 1, 2023, Montgomery County law 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.
All ground-contact or basement units of a residential rental in a single-family home or multifamily dwelling unit including condominiums are covered by the law.
Landlords are responsible for conducting a radon test before leasing a unit to a prospective tenant. The testing is to be at the expense of the landlord.
For new leases (including renewals), the landlord must provide the tenant and certify in the lease or in an addendum to the lease:
· A copy of radon test results indicates any concentration of radon is below the EPA's recommended action level
· The test was performed less than three years before the date of the lease
· A copy of the EPA's pamphlet is available through electronic link or by hard copy if requested by the tenant
· An existing tenant may conduct a radon test or hire a professional to test a dwelling
If the test results of a test conducted by the tenant indicate that a radon hazard is present at a level of 4 pCi/L or higher, the tenant has certain other obligations and rights detailed in the law.
The requirements are administered by the Department of Housing and Community Affairs. See https://www.montgomerycountymd.gov/DHCA/landlords/Radon.html
The City of Rockville adopted an Ordinance on March 27, 2023, that went into effect on September 27, 2023.
United States