Sanitation Districts of LA County—Landfill No. 5 Calabasas 5300 Lost Hills Rd, Agoura, CA91301 The Calabasas Landfill is owned by Los Angeles County and is operated by the Sanitation Districts. Spread over 505…More acres—with 416 acres designated for refuse disposal—the landfill began operation in 1961. The landfill is prohibited by County ordinance from accepting waste tires from outside of the wasteshed area. For more information about the landfill, call the number provided or visit the city's website.