Old San Marcos Landfill - Municipal Solid Waste Landfill in San Marcos, California

Old San Marcos Landfill is an operational landfill located in San Marcos, California, within San Diego County. It serves as a solid waste disposal facility for the region, managing municipal solid waste generated by local communities and businesses. The facility is situated at Pacific Street and Linda Vista, with a postal code of 92069. As a landfill in California, Old San Marcos Landfill operates under the regulatory framework of the US EPA's Resource Conservation and Recovery Act (RCRA) Subtitle D, which governs municipal solid waste landfills. Additionally, it must comply with California's stringent landfill regulations, including those related to landfill gas management and leachate control. The facility's NAICS code 562212 indicates it is specifically engaged in solid waste landfill operations. The environmental significance of Old San Marcos Landfill lies in its role in managing waste for the San Marcos area. Landfills of this type are designed with liners and leachate collection systems to protect groundwater, and gas collection systems to capture methane for energy or flaring. The facility's proximity to residential areas and local ecosystems necessitates careful operational monitoring to minimize community and environmental impacts.

Old San Marcos Landfill is located in San Diego County, California, a region with a Mediterranean climate and significant urban development. The facility's environmental context includes potential risks from landfill gas emissions, particularly methane, a potent greenhouse gas. Leachate management is critical to prevent groundwater contamination, especially given the area's reliance on local aquifers. Proximity to residential communities also raises concerns about odor, traffic, and air quality. Regulatory oversight by the California Department of Resources Recycling and Recovery (CalRecycle) and the US EPA ensures compliance with modern landfill standards.