Accra Sewerage Improvement Project (ASIP), Ghana

Upgrading Accra’s sewerage system to improve sanitation and environmental sustainability.

Client

Accra Sewerage Improvement Works

Project date

2014-2016

The Accra Metropolitan Assembly (AMA) initiated a major infrastructure upgrade to improve the city’s ageing and fragmented sewerage system. Zutari was appointed as a sub-contractor to CPP Botswana to design the sewage works and pump stations, and to assist during the construction supervision phase.

The opportunity

AMA engaged Lahmeyer to assess the sanitation challenges in Accra and develop a comprehensive plan to address them. The investigation revealed that while several areas had existing sewerage infrastructure, many systems had deteriorated and were no longer functional. The study recommended rehabilitating these systems and expanding the network to accommodate residents using septic tanks, thereby reducing pollution and improving public health.

What we did

AMA and the African Development Bank (AfDB) funded the study and moved forward with construction. CPP Botswana approached Zutari to:

Design sewage treatment works and pump stations

Assist with construction supervision to ensure mechanical standards were met

Review and refine existing designs

Prepare tender documentation

Supervise contract execution

The project was divided into four contracts:

Contract 1: Sewage works to treat 7 megalitres per day, four pump stations, rising mains, two gravity sewers, and a marine outfall

Contract 2: Sewage works to treat 6 megalitres per day, four pump stations, rising mains, a gravity sewer, and a gravity outfall

Contract 3: Rehabilitation and expansion of the sewerage network

Contract 4: Procurement of equipment for infrastructure maintenance

CPP led the majority of the construction supervision.

New pump stations and treatment works form part of Accra’s revitalised sewerage infrastructure.

The outcome

The project significantly enhances Accra’s capacity to manage wastewater in an environmentally sustainable way. It supports improved public health, reduces pollution, and ensures long-term infrastructure resilience.

The Accra Sewerage Improvement Project demonstrates the power of collaboration in tackling urban infrastructure challenges. Through strategic partnerships and expert engineering, the city is now better equipped to manage its wastewater sustainably and efficiently.

“This initiative marks a turning point in Accra’s sanitation journey, laying the foundation for a cleaner, healthier urban environment.”

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Accra Sewerage Improvement Project (ASIP), Ghana

Client

Project date

The opportunity

What we did

The outcome

Related projects

Jiji and Mulembwe Hydropower Projects, Burundi

Polihali Transfer Tunnel, Lesotho Highlands Water Project Phase II

Senqu River Bridge, Lesotho Highlands Water Project Phase II

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Want to see more?

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Want to
see more?

Want to
see more?