Overview
WALNUT & ARROW is an operational landfill in San Dimas, California, serving the Los Angeles County area. It manages solid waste under US EPA RCRA Subtitle D regulations.
WALNUT & ARROW is an operational landfill located at the intersection of Walnut Avenue and Arrow Highway in San Dimas, California. Situated in Los Angeles County, this facility is part of the solid waste management infrastructure serving a densely populated region. As a landfill, it accepts municipal solid waste and operates under the regulatory framework of the US EPA's Resource Conservation and Recovery Act (RCRA) Subtitle D, which governs the design, operation, and closure of municipal solid waste landfills. The facility is classified under NAICS code 562212 (Solid Waste Landfill). Landfills in Los Angeles County typically handle substantial volumes of waste due to the region's high population density. Operational practices include waste compaction, daily cover, and systems for leachate management and landfill gas collection to mitigate environmental impacts. The landfill operates under permits issued by the California Department of Resources Recycling and Recovery (CalRecycle) and local enforcement agencies. WALNUT & ARROW plays a key role in managing solid waste from San Dimas and surrounding communities. Its location in a semi-arid climate with Mediterranean characteristics influences leachate generation and gas production rates. The facility contributes to regional waste diversion goals and is subject to ongoing monitoring for groundwater quality and methane emissions, in line with state and federal environmental standards.
Environmental context
Landfills in Southern California face unique environmental challenges due to the region's Mediterranean climate, with dry summers and occasional heavy rainfall events that can stress leachate management systems. Proximity to urban areas in Los Angeles County raises concerns about odor, traffic, and potential groundwater impacts. Methane generation from decomposing waste requires active gas collection systems to reduce greenhouse gas emissions and comply with Clean Air Act regulations. The facility's location in a seismically active region also necessitates robust liner and cover systems to prevent leakage.
Frequently asked questions
WALNUT & ARROW landfill is located at Walnut Avenue and Arrow Highway in San Dimas, California, within Los Angeles County.
As a municipal solid waste landfill, WALNUT & ARROW accepts household and commercial waste, subject to local regulations and permit conditions.
Landfills in California must comply with US EPA RCRA Subtitle D standards, the Clean Air Act for landfill gas, and state-specific requirements from CalRecycle, including groundwater monitoring and financial assurance for closure.
Landfills in the US are required to collect and control landfill gas under the Clean Air Act. WALNUT & ARROW likely operates a gas collection system to reduce methane emissions, which may be flared or used for energy recovery.
Landfills in Los Angeles County can impact local air quality through methane and odor, and pose risks to groundwater if leachate is not properly managed. Regulatory oversight aims to minimize these impacts through engineered systems and monitoring.
Other Landfill plants in United States · 6 nearby