Angola’s First Large-Scale Desalination Project
In August 2025, Angola’s Ministry of Energy and Water (MINEA) awarded a concession for the country’s first large-scale seawater desalination plant, marking a strategic inflection point in how the nation sources and secures its drinking water supply. Located on the Mussulo Peninsula, the narrow sandy spit that stretches south of Luanda across the bay, the project represents a US$200 million public-private partnership (PPP) that will produce 100,000 cubic metres per day (m³/day) of drinking water through reverse osmosis technology, serving approximately 800,000 residents of Mussulo and the adjacent Futungo area.
The concession was awarded to Water Alliance Ventures, a joint venture formed by Cox Energy (Spain) and AMEA Power (United Arab Emirates). The award followed a Memorandum of Understanding (MoU) signed in 2022 between the parties and MINEA, succeeded by a detailed feasibility study and competitive evaluation process. The concession agreement was signed in the presence of President Joao Lourenco and Minister of Energy and Water Joao Baptista Borges, signalling the highest level of political commitment to the project.
This project is significant on multiple dimensions: it introduces desalination technology to Angola at commercial scale, it establishes a PPP concession model in the water sector that the government intends to replicate, it diversifies Luanda’s water sources away from exclusive dependence on the Kwanza and Bengo river systems, and it brings international private-sector capital and technical expertise into a sector that has historically been dominated by government-funded, publicly operated infrastructure.
Technical Design and Phasing
Reverse Osmosis Technology
The Mussulo plant will employ seawater reverse osmosis (SWRO) technology, the global standard for large-scale desalination. In SWRO, seawater is drawn through intake structures, pre-treated to remove suspended solids and biological contaminants, and then forced under high pressure through semi-permeable membranes that allow water molecules to pass while rejecting dissolved salts and other impurities. The resulting permeate is remineralised and disinfected to meet drinking water quality standards before distribution.
Modern SWRO technology has achieved significant improvements in energy efficiency over the past two decades, with specific energy consumption declining from approximately 5-6 kilowatt-hours per cubic metre (kWh/m³) in earlier generations to 3-4 kWh/m³ in current best-practice installations employing energy recovery devices. This improvement is material to the project economics, as energy costs typically represent 30 to 40 percent of total desalination operating costs.
Two-Phase Construction
The project will be constructed in two phases, each delivering 50,000 m³/day of production capacity:
| Parameter | Phase 1 | Phase 2 | Total |
|---|---|---|---|
| Production capacity | 50,000 m³/day | 50,000 m³/day | 100,000 m³/day |
| Population served | ~400,000 | ~400,000 | ~800,000 |
| Target commissioning | Q2 2028 | Under feasibility review | Full build-out under feasibility review |
| Estimated cost | ~$100M | ~$100M | ~$200M |
| Technology | SWRO with energy recovery | SWRO with energy recovery | - |
| Water quality | WHO standards | WHO standards | - |
Phase 1 is targeted for commissioning in the second quarter of 2028, approximately three years from concession award. This timeline is ambitious but consistent with international benchmarks for SWRO plants of similar scale, provided that permitting, financing, and equipment procurement proceed without significant delays.
Site Characteristics
The Mussulo Peninsula offers several advantages as a desalination site. Its coastal location provides direct access to the Atlantic Ocean for seawater intake and brine discharge. The relatively low density of existing development on parts of the peninsula reduces land acquisition complexity. Proximity to the Futungo administrative area and to Luanda’s southern residential districts means that transmission distances to the initial distribution network are manageable.
However, the site also presents engineering challenges. The sandy substrate of the peninsula requires careful foundation design for the heavy industrial structures of a desalination plant. Environmental management of the brine concentrate discharge—which contains approximately twice the salinity of the intake seawater along with residual treatment chemicals—must comply with Angolan environmental regulations and international best practices to avoid impacts on the coastal marine ecosystem, including the ecologically sensitive Mussulo Bay.
The Concessionaires: Cox Energy and AMEA Power
Cox Energy (Spain)
Cox Energy is a Spanish energy and infrastructure company with operations across Latin America and, increasingly, Africa. The company brings desalination engineering expertise and experience in developing large-scale infrastructure projects under concession and PPP frameworks. Cox’s involvement provides access to European engineering standards, equipment supply chains (including membrane manufacturers and energy recovery device suppliers), and project management methodologies refined across multiple markets.
AMEA Power (UAE)
AMEA Power is a UAE-based independent power producer and infrastructure developer with a growing portfolio across Africa and the Middle East. The company has been actively developing renewable energy and water projects in several African markets, bringing both financial capacity and regional operational experience. AMEA Power’s participation links the Mussulo project to the Gulf capital markets and to a broader trend of UAE-based developers expanding their African infrastructure footprint, particularly in sectors where desalination and renewable energy can be combined.
The joint venture structure—combining a European technology specialist with a Gulf-based developer and financier—is a model increasingly seen in African infrastructure development, where projects require both technical credibility and access to patient capital.
PPP Concession Structure
The Mussulo project operates under a concession agreement between MINEA and Water Alliance Ventures. While the full terms have not been publicly disclosed, the structure follows established PPP principles for water desalination:
Build-Operate-Transfer (BOT) or Build-Own-Operate (BOO): The concessionaire designs, finances, constructs, and operates the facility for a defined concession period, after which ownership may transfer to the government or the concession may be renewed. During the operating period, the concessionaire sells treated water to the public water utility (the provincial water and sanitation utility for Luanda) under a water purchase agreement (WPA) at an agreed tariff.
Revenue Model: The tariff structure under the WPA must be sufficient to cover the concessionaire’s operating costs (energy, chemicals, membrane replacement, staffing, maintenance), debt service on project finance, and a return on equity. Tariff levels for desalinated water in African contexts typically range from US$0.80 to US$1.50 per cubic metre, depending on energy costs, plant scale, and financing terms. The IRSEA regulator’s role in water tariff oversight will be relevant to ensuring that the bulk water tariff paid to the concessionaire is consistent with end-user affordability and utility financial sustainability.
Risk Allocation: Effective PPP structures allocate risks to the party best positioned to manage them. Construction risk sits primarily with the concessionaire and its EPC contractor. Demand risk may be partially mitigated by take-or-pay provisions in the WPA. Currency risk—a significant concern in Angola given kwanza volatility—requires careful structuring, potentially through indexation mechanisms linking the tariff to foreign exchange movements or through partial denomination of the WPA in hard currency.
The Mussulo PPP is notable as a precedent for Angola’s water sector. The concession model for the Cox/AMEA desalination plant, as noted by the IRSEA regulatory framework, signals openness to private concessions in water production—a departure from the historically government-dominated sector.
Strategic Rationale: Climate Resilience and Supply Diversification
Reducing Dependence on River-Based Sources
Luanda’s existing water supply is overwhelmingly dependent on two river systems: the Kwanza River (which feeds the major treatment plants including the Kifangondo works and the new Bita project) and the Bengo River (which feeds the Kabusa treatment plant). This concentration creates a single-source vulnerability that climate change is amplifying.
Angola’s heavy reliance on hydropower and rain-fed water supply makes it vulnerable to climate variability. Extended droughts, like those that have afflicted southern Angola, can reduce both hydroelectric output and raw water availability simultaneously. If the Kwanza basin faced an unprecedented drought, water production at the river-dependent treatment plants would decline, potentially triggering supply rationing for millions of Luanda residents.
Desalination provides a climate-independent water source, a consideration that aligns with Angola’s broader climate finance and adaptation priorities. The Atlantic Ocean’s availability is not subject to rainfall variability, seasonal flow patterns, or upstream abstraction competition. By adding 100,000 m³/day of desalinated supply, the Mussulo plant reduces Luanda’s vulnerability to drought-induced supply disruptions and provides a baseload water source that can maintain supply during periods when river-based treatment capacity is constrained.
Alignment with Global Desalination Trends
The Mussulo project aligns Angola with a global trend of coastal cities adopting desalination to address water security challenges. Across the Middle East, North Africa, and increasingly in Sub-Saharan Africa, desalination is moving from a technology of last resort to a mainstream component of integrated water resource planning. Recent comparable projects in the African context include facilities in Ghana (Teshie), Kenya (Mombasa), and South Africa (various emergency plants in the Western Cape), each driven by similar motivations of supply diversification and climate resilience.
| Desalination Project | Country | Capacity (m³/day) | Technology | Status |
|---|---|---|---|---|
| Mussulo | Angola | 100,000 | SWRO | Concession awarded Aug 2025 |
| Teshie (Accra) | Ghana | 60,000 | SWRO | Operational |
| Mombasa | Kenya | 100,000 | SWRO | Under development |
| Various emergency | South Africa | 10,000-30,000 | SWRO/BWRO | Operational |
| Soyo (potential) | Angola | Under assessment | SWRO | Conceptual |
The Mussulo plant’s 100,000 m³/day capacity positions it as one of the larger SWRO installations in Sub-Saharan Africa outside South Africa, underscoring the scale of Angola’s commitment.
Energy Requirements and the Water-Energy Nexus
Desalination is energy-intensive, and the Mussulo plant’s electricity requirements will be substantial. At a specific energy consumption of 3.5 to 4.0 kWh/m³ (a reasonable estimate for a modern, well-designed SWRO plant with energy recovery), the facility will require approximately 350 to 400 megawatt-hours per day (MWh/day) at full capacity, equivalent to a continuous power demand of approximately 15 to 17 megawatts (MW).
This energy demand must be reliably supplied, as desalination plants require continuous operation to maintain membrane integrity and water quality. The source of this electricity—whether from the Luanda grid (fed primarily by hydroelectric generation from the Kwanza cascade), from dedicated on-site generation, or from a hybrid arrangement—has implications for both operating costs and the project’s carbon footprint.
The involvement of AMEA Power, an independent power producer with a renewable energy portfolio, raises the prospect that on-site or dedicated solar generation could supply a portion of the plant’s electricity needs, potentially reducing operating costs and aligning the project with Angola’s broader energy transition objectives. Solar-desalination hybrid configurations have been deployed successfully in other markets and represent an opportunity for the Mussulo project to demonstrate integrated water-energy infrastructure.
| Energy Parameter | Estimate |
|---|---|
| Specific energy consumption | 3.5-4.0 kWh/m³ |
| Daily energy demand (full capacity) | 350-400 MWh/day |
| Continuous power requirement | ~15-17 MW |
| Primary grid source | Kwanza cascade hydropower |
| Potential renewable supplement | On-site solar PV |
Economic and Social Impact
Household Economic Benefits
For the approximately 800,000 residents of Mussulo and Futungo who will be served by the desalination plant, the availability of piped treated water will generate measurable economic benefits. Households currently paying premium prices for tanker-delivered water or investing in private boreholes and purification equipment will see their water costs decline substantially. This cost reduction translates directly to increased disposable income for low- and middle-income households.
Public Health Benefits
Access to treated, quality-controlled drinking water from the desalination plant will reduce the incidence of waterborne diseases in the served population. The WHO estimates that improved water supply can reduce diarrheal disease incidence by 25 to 50 percent in populations transitioning from unsafe to safe sources. For Luanda’s health system, already under strain, this reduction in disease burden translates to fewer hospitalisations, lower healthcare costs, and improved productivity.
Industrial and Commercial Water Supply
Beyond residential supply, the Mussulo plant’s output can contribute to meeting commercial and light industrial water demand in the served area. Reliable water supply is a prerequisite for businesses ranging from food processing to hospitality, and the availability of desalinated water can support economic development in the Mussulo and Futungo areas.
Replication Potential
The Mussulo project is explicitly positioned by MINEA as a model for future PPP-based water infrastructure. The concession framework, once proven operationally, can be replicated for desalination or water treatment plants in other coastal cities facing supply constraints. Potential replication sites include:
- Lobito/Benguela: Angola’s second-largest urban agglomeration, located on the central coast with direct Atlantic Ocean access.
- Namibe: A southern coastal city in a semi-arid region where surface water resources are scarce and groundwater supplies are under stress.
- Soyo: A northern coastal city experiencing growth driven by LNG and gas sector developments.
- Cabinda: An enclave province with limited freshwater resources relative to its population.
The PPP model is also applicable beyond desalination: management contracts for urban water distribution, concessions for new conventional water treatment plants in secondary cities, and wastewater treatment facilities are all candidates for private-sector participation using the frameworks being established through the Mussulo precedent.
Risks and Considerations
Brine Discharge and Environmental Management
The disposal of concentrated brine—the reject stream from the SWRO process—is a key environmental consideration. At 100,000 m³/day of permeate production with a typical 40-45 percent recovery rate, the plant will discharge approximately 120,000-150,000 m³/day of concentrated brine to the ocean. The environmental impact assessment must ensure that the discharge diffuser system achieves rapid dilution to prevent harm to marine life, particularly in the ecologically sensitive Mussulo Bay area.
Energy Cost Exposure
With energy representing 30-40 percent of operating costs, the plant’s economics are sensitive to electricity tariff levels and any changes in the power sector’s tariff structure. If Angola’s electricity tariffs increase (as anticipated under sector reforms aimed at achieving cost-reflective pricing), the impact on desalination water production costs must be managed through the WPA tariff adjustment mechanism.
Demand and Off-Take Risk
The WPA between the concessionaire and the public utility must ensure that the water produced is effectively distributed to end users and that tariff revenues are collected at rates sufficient to honour the purchase agreement. The provincial water utility’s commercial management capacity—billing, collection, reduction of non-revenue water—is a critical determinant of whether the PPP structure remains financially sustainable.
Outlook
The Mussulo Seawater Desalination Plant represents a watershed moment for Angola’s water sector. It introduces proven desalination technology at meaningful scale, establishes a replicable PPP framework, diversifies Luanda’s water supply against climate risk, and brings credible international private-sector operators into a sector that needs both capital and expertise. The project’s successful delivery will not only serve 800,000 residents but will fundamentally reshape the commercial and institutional landscape for water infrastructure investment in Angola.
The concession award in August 2025 transitions the project from concept to execution. The coming three years—through to Phase 1 commissioning targeted for Q2 2028—will test whether the PPP framework, the financing structure, and the operational partnership between Cox Energy, AMEA Power, and Angola’s water institutions can deliver on the project’s transformative promise. For the SDG 6 agenda in Southern Africa, the answer matters considerably.