Decontamination of the Dandora Dumpsite
The rehabilitation of the Dandora Dumpsite is a key component of the Nairobi River Regeneration Programme. The intervention recognizes that lasting river regeneration cannot be achieved without addressing upstream sources of pollution, particularly solid waste management.
Background and Context
Established in the late 1970s, the Dandora Dumpsite has for decades served as Nairobi’s main solid waste disposal facility. Over time, uncontrolled dumping, poor waste segregation, and encroachment led to severe environmental and public health challenges. The dumpsite became a major source of pollution to the Nairobi River, with waste frequently spilling into the river channel and surrounding riparian areas. Leachate from decomposing waste contaminated surface and groundwater, while open burning contributed to air pollution, adversely affecting nearby communities.
Previous efforts to address the dumpsite yielded limited results due to fragmented institutional mandates and inadequate coordination. The establishment of the Nairobi Rivers Commission provided a renewed opportunity to address the Dandora challenge through an integrated, multi-agency approach aligned to broader river basin restoration efforts.
Ongoing Rehabilitation Works
The current phase of the Dandora Dumpsite project focuses on environmental remediation and risk reduction. The scope of work entails a comprehensive intervention along the river and its immediate surroundings. It begins with the excavation of garbage fill material from the river itself, the riverbank and the adjacent area extending up to 50 meters from the river’s centerline, covering a stretch of approximately 1,200 meters. The excavated waste will then be transported and deposited at a designated section of the dumpsite.
Following this, the edges of the resulting garbage mound facing the river will be carefully shaped to prevent it from collapsing. To further stabilize the site, soil material will be deposited to cover the exposed sections of the mound along the riverside. In addition, a reinforced concrete wall will be constructed to serve as a barrier against future garbage encroachment into the river and to minimize leachate seepage. Finally, leachate drainage pipes will be installed to ensure proper management of liquid waste and safeguard the river’s ecological integrity.
The project supports improved waste management practices, including waste segregation and recovery, to reduce the volume of waste requiring disposal. These efforts are closely linked to broader urban sanitation and sewerage upgrades underway along the river corridor.
Environmental and Social Impact
The rehabilitation of the Dandora Dumpsite is expected to deliver significant environmental benefits, including improved water quality in the Nairobi River, reduced flood risk, and the restoration of degraded riparian ecosystems. For surrounding communities, the project contributes to improved public health, reduced exposure to pollutants, and safer living environments.
Importantly, the intervention also recognizes the livelihoods of waste pickers and informal workers who depend on the site. Through coordinated engagement with relevant agencies and partners, efforts are underway to integrate social safeguards and alternative livelihood considerations into the broader regeneration agenda.
Looking Ahead
The Dandora Dumpsite Rehabilitation Project represents a critical step towards addressing one of the most persistent sources of pollution in the Nairobi River Basin.
As the Nairobi River Regeneration Programme progresses, NRC will continue to work with partners to ensure that gains made at Dandora are sustained and complemented by upstream and downstream interventions, reinforcing the goal of a clean, resilient and life-giving Nairobi River system.
