(420 ILCS 46/25)
    Sec. 25. Disclosure of Radon hazard to current and prospective tenants.
    (a) A lessor of a dwelling unit shall disclose to lessees the existence of a radon hazard consistent with the provisions of this Section. For the purposes of this Section, "dwelling unit" means a room or suite of rooms used for human habitation and for which a lessor and a lessee have a written lease agreement.
    (b) The provisions of this Section apply only to dwelling units located below the third story above ground level.
    (c) If a current lessee has provided in writing to the lessor the results of a radon test that indicate that a radon hazard exists in a dwelling unit covered by this Section, then the lessor shall disclose in writing to any individual seeking to enter into a lease of that dwelling unit that a radon test has indicated that a radon hazard may exist in the dwelling unit. After receiving a notification of a radon test that indicates a radon hazard, the lessor may choose to conduct a radon test in the dwelling unit. If the lessor's radon test indicates that a radon hazard does not exist on the premises, the lessor shall not be required to disclose that a radon hazard exists in the dwelling unit.
    (d) If a lessor conducts a radon test in a dwelling unit and the radon test indicates that a radon hazard exists in the dwelling unit, the lessor shall disclose in writing to the current lessee, and any individual seeking to enter into a lease of that dwelling unit, the existence of a radon hazard in the dwelling unit.
    (e) If a lessor has undertaken mitigation activities and a subsequent radon test indicates that a radon hazard does not exist in the dwelling unit, then the lessor is not required to provide the disclosure required by this Section.
    (f) Nothing in this Section shall be construed to require a lessor to conduct radon testing.
(Source: P.A. 97-21, eff. 1-1-12.)