Viejas Sanitary Landfill - Operational Landfill in Descanso, California

Viejas Sanitary Landfill is an operational landfill located at 7850 Campbell Ranch Road in Descanso, San Diego County, California. It serves the region's solid waste management needs as part of the broader waste infrastructure in Southern California. As a landfill operating in the United States, this facility is subject to federal regulations under the Resource Conservation and Recovery Act (RCRA) Subtitle D, which governs municipal solid waste landfills, as well as Clean Air Act requirements for landfill gas management. California imposes additional stringent state-level standards for landfill operations, including leachate control and groundwater monitoring. The landfill plays a key role in managing waste from surrounding communities in San Diego County. Its location in a semi-rural area near the Cleveland National Forest necessitates careful environmental management to protect local ecosystems and water resources.

The landfill is situated in a mountainous region of San Diego County, an area with Mediterranean climate and significant wildfire risk. Proximity to the Cleveland National Forest and local watersheds requires robust leachate management and groundwater monitoring to prevent contamination. Landfill gas collection systems are critical to mitigate methane emissions, a potent greenhouse gas, and to comply with EPA's landfill gas regulations.