"Mattress Stewardship Act;" requires mattress producers to join stewardship organization and implement mattress stewardship program.

This bill requires mattress producers (manufacturers, importers, or brands) to join a nonprofit stewardship organization within one year of the law taking effect. The organization will manage the collection and environmentally sound disposal of discarded mattresses through a program funded by a small "stewardship assessment" added to each mattress purchase price. Retailers and renovators selling mattresses must also register with the organization. The program aims to ensure discarded mattresses are recycled, renovated, or disposed of safely, reducing landfill waste and environmental harm.