Waimanalo Gulch Landfill - Kapolei, Hawaii Solid Waste Management Facility

The County of Honolulu - WM - Waimanalo Gulch Landfill is an operational solid waste facility located at 92-460 Farrington Highway in Kapolei, Hawaii. As a landfill, it serves as a primary disposal site for municipal solid waste generated on the island of Oahu, supporting the waste management needs of the local community. Operating under the regulatory framework of the United States, this facility must comply with the Environmental Protection Agency's (EPA) Resource Conservation and Recovery Act (RCRA) Subtitle D, which governs municipal solid waste landfills. Additionally, it is subject to Clean Air Act regulations concerning landfill gas emissions, including methane capture and control. The landfill's NAICS codes (562212 and 562213) indicate its involvement in solid waste landfill operations and other nonhazardous waste treatment and disposal. The Waimanalo Gulch Landfill plays a critical role in the waste management infrastructure of Oahu, handling a significant portion of the island's waste stream. Its operations are closely tied to local environmental considerations, such as groundwater protection and leachate management, given Hawaii's unique island geography and sensitive ecosystems.

Located in Kapolei on the island of Oahu, the Waimanalo Gulch Landfill operates in a tropical island environment where groundwater protection and leachate management are critical. The facility must address methane leakage through gas collection systems to mitigate greenhouse gas emissions. Proximity to coastal areas and residential communities necessitates careful management of odors, traffic, and potential impacts on local water resources.