Peggy Toy, director of the Health DATA Program, and Catherine Yount, public policy analyst, shared findings from their 2019 study, which highlights the high level of secondhand smoke in multi-unit housing in Los Angeles and gaps in existing voluntary smoke-free policies. Despite an increasing number of smoke-free local laws in the last 10 years, the proportion of Californians reporting exposure to secondhand smoke from tobacco, marijuana, and e-cigarette vapor continues to rise. Residents of market-rate, privately-owned multi-unit housing (e.g., apartments) are particularly at risk of drifting secondhand smoke. In their study conducted by the UCLA Center for Health Policy Research (CHPR) that included 4,800 tenants and 176 multi-unit housing owners in the City of Los Angeles, 49% of tenants reported exposure to drifting secondhand smoke, including tobacco (39%), marijuana (36%), and e-cigarette (9%). Presenters discussed the need for a consistent implementation and enforcement plan to prevent exposure to secondhand smoke for all Los Angeles residents.