Algeria is undertaking a transformation that receives considerably less international attention than its investments in gas pipelines, mining and steel. Along its Mediterranean coastline, a new generation of industrial facilities is converting seawater into drinking water on a scale that would have seemed ambitious only a decade ago. The country is no longer treating desalination as an emergency measure reserved for periods of drought. It is turning it into a permanent component of its national infrastructure.
The scale of the change is striking. Algeria's operating desalination fleet has reached approximately 3.7 million cubic metres per day, according to the Algerian Desalination Company and the Ministry of Hydrocarbons and Mines. That represents roughly 1.35 billion cubic metres annually if the installed capacity were operated continuously at its full nominal rate. The government now aims to raise national capacity to approximately 5.7 million cubic metres per day by 2030, while increasing the contribution of desalinated water to around 60 percent of drinking-water supply.
But the significance of this programme extends well beyond the volume of water produced. Every cubic metre of desalinated water requires electricity, specialised equipment, chemicals, pipelines and continuous maintenance. The expansion therefore creates a new relationship between Algeria's energy resources and its most fundamental economic requirement: water.
The country is effectively converting part of its energy advantage into water security. That may become one of the most consequential infrastructure decisions of its development strategy.
From emergency response to national infrastructure
Algeria's turn towards desalination was born out of necessity. The water shortages and prolonged droughts of the 1990s exposed the vulnerability of a supply system heavily dependent on rainfall, reservoirs and groundwater. Coastal cities were particularly exposed to the consequences of declining rainfall and growing urban consumption.
The first major desalination programme, launched in the early 2000s, established the foundations of the present system. Facilities were built at locations including Arzew, Skikda, Beni Saf, Mostaganem, Hamma, Fouka, Honaine, Souk Tlata, Cap Djinet and other coastal sites. The objective was to secure drinking-water supplies for densely populated areas and reduce dependence on increasingly stressed conventional resources.
The system has since expanded considerably. According to the published inventory of the Algerian Desalination Company, Algeria now operates 19 desalination plants with installed capacity of approximately 3.7 million cubic metres per day.
The network includes the large Macta facility, with a nominal capacity of 500,000 cubic metres per day, alongside several 300,000-cubic-metre installations. These include Cap Blanc in Oran, Fouka 2 in Tipaza, Cap Djinet 2 in Boumerdès, Tighremt in Béjaïa and Koudiet Draouche in El Tarf. Other important facilities include Hamma, Beni Saf, Mostaganem, Souk Tlata, Honaine and Ténès, each with a capacity of around 200,000 cubic metres per day.
Smaller facilities at Arzew, Skikda, Cap Djinet 1, Corso, El Marsa and Bateau Cassé complement the network.
The most recent major expansion was particularly significant. Five large plants, each designed for 300,000 cubic metres per day, were delivered through the programme launched in the early 2020s. Together, they added 1.5 million cubic metres of nominal daily capacity. Their locations were selected to strengthen supply along the northern coastal corridor, where most of Algeria's population is concentrated.
This expansion has changed the country's water-security equation. Desalination is reported to cover approximately 42 percent of national drinking-water requirements. The achievement is substantial, although installed capacity must not be confused with actual daily production: maintenance, seasonal demand, network constraints and operating conditions all affect the quantity that ultimately reaches consumers.
The next wave: a second desalination frontier
Algeria is not stopping at the 19 operating plants. Its next programme is designed to extend the network while increasing the geographical reach of desalinated water.
The Algerian Desalination Company has published a 2030 objective of 27 plants, a combined capacity of approximately 5.7 million cubic metres per day, more than 2,148 kilometres of associated distribution networks and service to over 28 million people.
One important part of the expansion is already moving from announcement to construction.
On December 29, 2025, Sonatrach announced the signing of contracts for three new plants, each designed for 300,000 cubic metres per day. They are located at Aïn Adjroud in Tlemcen, Dahra near El Marsa in Chlef, and Sidi Ladjel in Mostaganem. Their construction has been entrusted to Algerian companies within the Sonatrach and Cosider industrial groups.
The Tlemcen project had already reached its official construction launch in November 2025. Its planned capacity is 300,000 cubic metres daily, with an initial partial commissioning target of 150,000 cubic metres per day. The plant is expected to supply Tlemcen, Sidi Bel Abbès and Saïda, reducing pressure on regional dams and groundwater.
The Chlef and Mostaganem projects form part of the same additional programme. Each is designed for 300,000 cubic metres per day. Taken together, the three plants represent another 900,000 cubic metres of potential daily production.
The expansion is also reaching the eastern industrial corridor. On July 14, 2026, Sonatrach officially launched construction of a new desalination facility at Ben M'Hidi in the province of Skikda. Unlike the large 300,000-cubic-metre coastal plants, this project has a planned capacity of 140,000 cubic metres per day. Its allocation is particularly revealing: 100,000 cubic metres will supply the Skikda industrial zone, while the remaining 40,000 cubic metres will enter the public drinking-water network.
This is an important evolution in the national strategy. Desalination is no longer being developed exclusively as a means of supplying households. It is increasingly being integrated into the water requirements of industrial centres.
Other projects remain at different stages of preparation. The planned 300,000-cubic-metre facility in Tizi Ouzou was still undergoing site-selection work in September 2026, with 13 potential locations under consideration. Jijel is also part of the announced second-phase programme. These projects should not yet be counted as operating capacity or treated as having the same construction status as the three contracted plants.
The distinction between a project announcement, a signed contract, construction and full commercial operation is essential. Algeria's 2030 target is ambitious, but its achievement will depend on completing the plants, connecting them to distribution networks and ensuring that the electricity and maintenance systems are ready to support them.
The energy hidden inside every cubic metre
The most important economic dimension of desalination is often overlooked: water production has become another form of energy consumption.
Modern seawater reverse osmosis works by forcing seawater through specialised membranes under high pressure. The process separates dissolved salts from water, producing freshwater and a concentrated saline discharge. It is considerably more energy-efficient than older thermal desalination technologies, but it still requires a continuous supply of electricity.
Depending on seawater conditions, plant design, recovery rates and energy-recovery equipment, a large reverse-osmosis installation commonly requires approximately 3 to 6 kilowatt-hours of electricity per cubic metre of freshwater produced.
Applied to Algeria's current installed capacity of 3.7 million cubic metres per day, this implies an illustrative electricity requirement of between 11.1 and 22.2 gigawatt-hours daily if the entire fleet operated at full capacity. Annualised, that is approximately 4 to 8 terawatt-hours of electricity.
At the projected 2030 capacity of 5.7 million cubic metres per day, the equivalent requirement rises to approximately 6.2 to 12.5 terawatt-hours annually.
These are engineering scenarios, not measured national electricity consumption figures. They assume full utilisation of nominal capacity and apply a broad range of energy intensities. Actual consumption will depend on operating rates, plant efficiency and the energy required to pump water through the distribution network, which is not included in the calculation.
Nevertheless, the order of magnitude is significant. At the upper end of the 2030 scenario, desalination alone would represent an average electrical load of around 1.4 gigawatts.
For Algeria, this creates an important strategic advantage and a corresponding obligation. The country possesses substantial natural-gas resources and an established electricity-generation sector. Gas-fired power plants can provide the reliable electricity required by desalination facilities, while solar generation could reduce fuel consumption and operating emissions when conditions permit.
But the energy cost cannot be ignored. If desalination capacity expands without corresponding improvements in power-generation efficiency, electricity transmission and plant energy recovery, water security will increasingly compete with other uses of natural gas and electricity.
Desalination therefore reinforces the importance of Algeria's electricity strategy. The country is not simply building more water plants. It is creating a new source of industrial electricity demand.
Water for industry: the missing link in Algeria's industrial transformation
The relationship between water and industrialisation is becoming increasingly important.
Algeria's ambitions in iron and steel, phosphate processing, fertilizers, petrochemicals and mining all require dependable water supplies. These industries cannot operate efficiently if their production schedules are exposed to interruptions in municipal water supply or declining groundwater resources.
The phosphate complex in the east, the expansion of steel production and the development of new industrial zones all increase the importance of securing industrial water independently of local drinking-water networks.
The Skikda project illustrates this approach particularly clearly. Of its 140,000 cubic metres of planned daily production, 100,000 cubic metres are allocated to the industrial zone. This is not a minor allocation. It represents a deliberate effort to provide a dedicated water source for a strategic industrial location rather than allowing industrial consumption to compete entirely with households.
Such arrangements could become increasingly important as Algeria develops its petrochemical and manufacturing sectors.
The same logic applies to coastal industrial areas in Oran, Béjaïa, Mostaganem and other regions. Desalination can reduce pressure on conventional water resources while giving industrial operators a more predictable source of supply.
There is, however, an important geographical limitation. Producing water at the coast does not automatically make it economical to transport that water hundreds of kilometres inland. Pumping stations, pipelines, elevation differences and maintenance all add to the final cost. The economic value of desalination therefore depends not only on the capacity of the plant but also on the cost and reliability of the distribution network.
The Sahara: a different water equation
Algeria's southern development strategy introduces a different challenge.
The coastal desalination network is designed primarily to supply the densely populated northern regions. It cannot simply be extended across the Sahara to support every agricultural or industrial project. The distances involved, pumping requirements and cost of transporting water make such an approach difficult to justify for many uses.
The South requires a combination of groundwater management, wastewater reuse, local treatment and carefully designed infrastructure.
This is particularly relevant to Tamanrasset and Tindouf. In February 2026, the President ordered the launch of construction works for water-desalination plants in both locations, with work scheduled to begin in March. These inland projects must be distinguished from the coastal seawater programme. Their detailed capacities and technical configurations have not been publicly established in the same way as the major coastal plants.
Tindouf also has an additional strategic dimension. The authorities have linked its water programme to wastewater treatment and the requirements of agricultural development. The objective is to mobilise water more efficiently in a region where conventional freshwater resources are limited.
For the South, the priority should not be to replace groundwater with expensive desalinated water wherever possible. It should be to preserve aquifers, recycle water, treat saline resources where economically viable and direct high-quality freshwater towards uses that genuinely require it.
A refinery, cement factory or mining complex may be able to use treated wastewater for certain industrial applications, provided the required quality standards are met. Agriculture, meanwhile, requires careful crop selection, efficient irrigation and a realistic assessment of the long-term availability of groundwater.
Desalination can support southern development indirectly by reducing pressure on northern freshwater resources and strengthening the national water system. It is not, by itself, a solution to the Sahara's agricultural water constraints.
The environmental and financial price
Desalination offers a powerful response to water scarcity, but it is not a source of freshwater without consequences.
The first challenge is electricity. If the additional demand is met primarily through fossil-fuel generation, the expansion will increase the carbon intensity of water production. Energy recovery, efficient membranes, better plant design and the gradual integration of renewable electricity can reduce this burden.
The second challenge is concentrated brine. The desalination process produces a saline discharge containing a higher concentration of dissolved salts than the original seawater. Poorly designed or inadequately monitored discharge systems can affect marine ecosystems near the plant. Intake structures, discharge diffusers, chemical residues and local marine conditions must therefore be treated as engineering priorities rather than secondary environmental considerations.
The third challenge is financial sustainability. Building a desalination plant is only the beginning. Membranes must be replaced, pumps maintained, chemicals purchased, electricity supplied and distribution infrastructure operated. A plant that reaches its designed capacity but cannot maintain stable production will not deliver the promised level of water security.
The national programme must therefore be judged not only by the number of facilities inaugurated but also by their operating performance over time.
There is also an opportunity for Algeria to develop a domestic industrial ecosystem around desalination. The construction of five major plants in 2025 demonstrated the capacity of Algerian engineering and industrial companies to participate in large infrastructure programmes. The next step is to deepen local expertise in membrane systems, high-pressure pumps, instrumentation, automation, maintenance and water-quality monitoring.
This could create an industrial capability that extends beyond the domestic market. Many African and Mediterranean countries face similar water-security challenges. Algeria's experience could eventually become an exportable service, not merely a collection of domestic infrastructure projects.
The next strategic resource
Algeria's desalination programme should be understood as part of a broader economic transformation. Gas provides energy, electricity powers industrial activity, and desalination converts part of that energy into a resource that is becoming increasingly scarce.
The country is effectively building a new layer of infrastructure between its energy sector and its population. That layer will help secure drinking water, support industrial expansion and reduce exposure to prolonged droughts.
Yet the ultimate test will not be the announcement of a 5.7-million-cubic-metre daily target. It will be the ability to operate those plants efficiently, deliver the water to consumers and industrial users, manage the environmental consequences and keep the electricity cost under control.
The deeper significance of the programme is that water is becoming an industrial input with national strategic importance. In the coming decades, countries will compete not only over access to energy and minerals, but also over the ability to secure reliable water at an affordable cost.
Algeria has chosen to use part of its energy advantage to address that challenge. Whether this becomes a durable competitive advantage will depend on what happens beyond the desalination plant gates: the power stations, the pipelines, the distribution networks, the maintenance industry and the management of the country's remaining freshwater reserves.
The transformation is already under way. Its real measure will be whether Algeria can turn a vast investment in water production into a more resilient economy.
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