Decades of research has made it clear that current setback distances – in states where they exist – are inadequate to protect public health

Ashley Hernandez was in middle school when her family moved into its first house, in the Los Angeles neighborhood of Wilmington. For years, her undocumented parents had moved around in search of steady work, gone without meals, rented out too-small apartments. Finally they had a place of their own, with three bedrooms and even a yard.

“My parents were really excited about that American dream that we’d always talked about,” Hernandez said.