The bill amends RCW 59.18.060 to enhance rental property disclosures regarding flooding history and flood risk. It mandates that landlords disclose to tenants if the property is located in a special flood hazard area or an area of potential flooding, provided the landlord has actual knowledge of such conditions. This includes situations where the landlord has received written notice from a public agency, is required by a mortgage holder to carry flood insurance, or currently carries flood insurance. Additionally, landlords must inform tenants of any known flooding, drainage issues, and the limitations of their insurance regarding tenants' personal possessions, recommending that tenants consider purchasing renter's and flood insurance.

Furthermore, the bill requires landlords to provide tenants with information about health hazards associated with indoor mold and to disclose the name and address of the landlord or their agent. It also includes a provision that grants landlords immunity from civil liability for failure to comply with the new disclosure requirements, unless there is intentional non-compliance. The bill aims to ensure that tenants are better informed about potential risks associated with their rental properties, particularly concerning flooding and mold exposure.