View of a plant owned by Aguas Antofagasta, a company created 20 years ago that now has three desalination plants to supply drinking water to 184,000 families in that desert city in northern Chile. Credit: Courtesy of Acades

By Orlando Milesi
SANTIAGO, Oct 22 2025 (IPS)

Desalination projects are booming in Chile, with 51 plants planned to process seawater and a combined investment of US$ 24.455 billion. However, these initiatives hardly benefit small-scale farmers, who are threatened by the prolonged drought, and cause environmental concerns.

A survey by the Capital Goods Corporation and the Chilean Desalination and Reuse Association (Acades) revealed that these projects, already in the engineering and construction phases, will add 39,043 liters of water per second in production capacity."Using seawater, desalinated or saline, and reusing wastewater relieves pressure on rivers and aquifers, ensuring water for people, ecosystems, and productive activities" –Rafael Palacios.

Fifteen of these projects belong to the mining sector, eight to the industrial sector, eight to the water utility sector, and 20 are linked to green hydrogen, a clean fuel but very water-intensive, which the country aims to be a major producer of.

Of the future plants, 17 are located in the desert region of Antofagasta, in the far north of this elongated South American country, which lies between the Andes mountain range and the Pacific Ocean.

There are 11 projects in the southern region of Magallanes, followed in number by the regions of Atacama, Coquimbo, and Valparaíso, in the north and center of Chile, which concentrate most of the investment.

Rafael Palacios, executive director of Acades, told IPS that this country “faces a scenario in which water availability in northern and central Chile could decrease by up to 50% by 2060, so we cannot continue to depend solely on continental sources.”

“Using seawater, desalinated or saline, and reusing wastewater relieves pressure on rivers and aquifers, ensuring water for people, ecosystems, and productive activities,” he emphasized.

Currently, 23 desalination plants are already operating in Chile with a capacity of 9,500 liters per second. They primarily serve mining needs, but also industrial and human consumption.

One of the large greenhouses for the hydroponic cultivation of vegetables irrigated with desalinated water, on the farm of one of the 90 members of the Association of Agricultural Producers of Altos de la Portada, in the northern Chilean region of Antofagasta. Credit: Courtesy of the Association of Agricultural Producers of Altos de la Portada.

Small-scale farmers benefit

Dolores Jiménez has been president for the last eight years of the Association of Agricultural Producers of Altos de la Portada, in Antofagasta. The association has 90 active members who collectively own 100 hectares where they have created a Hydroponic City.

“We have no water problems thanks to an agreement with Aguas Antofagasta. We have an oasis which we would otherwise not have without that agreement,” Jiménez told IPS by telephone from Antofagasta, the capital of the region of the same name.

Aguas Antofagasta is a private company that desalinates water in the north of this country of 19.7 million inhabitants. The company draws water from the Pacific Ocean using an outfall that extends 600 meters offshore to a depth of 25 meters.

In desalination, outfalls are the underwater pipes that draw seawater and return and disperse the brine in a controlled manner, far from the coast and at an adequate depth.

Founded 20 years ago, the company currently desalinates water in three plants in the municipalities of Antofagasta, Tocopilla, and Tal Tal, supplying 184,000 families in that region.

Dolores Jiménez, president of the Association of Agricultural Producers of Altos de la Portada, shows the strength of the crops thanks to the use of desalinated water that reaches small farmers due to an agreement with Aguas Antofagasta. Credit: Courtesy of the Association of Agricultural Producers of Altos de la Portada

In its project to supply the general population, it included the association of small-scale farmers who grow carrots, broccoli, Italian zucchini, cucumbers, medicinal herbs, and edible flowers.

“They support us with water from the pipeline that goes to Mejillones (a coastal city in the region). They financed the connection for us to fill six 30,000 liter tanks, installed on a plot at the highest point. From there, we distribute it using a water tanker truck,” informed Jiménez.

“Now, thanks to a project by the (state) National Irrigation Commission, we were able to secure 280 million pesos (US$294,000) for an inter-farm connection that will deliver water through pipes to 70 plots,” she added.

This will mean significant savings for the farmers.

Jesús Basáez in his farm in Pullally, on the central coast of Chile. There he grows quinoa, which he irrigates with highly saline water that the grain tolerates without problems. Previously, that saline water forced him to stop producing strawberries. Credit: Orlando Milesi / IPS

In Pullally, in the municipality of Papudo, in the central Valparaíso region, 155 kilometers northwest of Santiago, Jesús Basáez used to grow strawberries alongside a dozen other small farmers. But the crop failed due to the salinity of the groundwater, apparently caused by the drought affecting the La Ligua and Petorca rivers and proximity to the sea.

He then switched to quinoa, which tolerates salinity well. Today he is known as the King of Quinoa, a grain valued for its nutritional properties and versatility, which was an ancestral food of Andean highland peoples and has now spread among small Chilean farmers.

Basáez has three hectares planted with white, red, and black varieties of quinoa, which he irrigates with water obtained from a well, as he told IPS during a visit to his farm.

The public University of Playa Ancha, based in the city of Valparaíso, installed a mobile desalination plant on his farm that uses reverse osmosis to remove components from the saltwater that are harmful for irrigation. Pressure is applied to the saltwater so that it passes through a semipermeable membrane that filters the water, separating the salts.

After successful tests, Basáez is now about to resume his strawberry cultivation.

“It was three years of research, and it was concluded that it is viable to produce non-brackish water to grow strawberries again. The problem is that the cost remains very high and prevents replicating this experience for other farmers,” he said. The mobile plant cost the equivalent of US$ 84,000.

The mobile desalination plant installed on Jesús Basáez’s farm to research the high salinity of the water at the site. For three years, teachers and students from the University of Playa Ancha, in the central Chilean region of Valparaíso, researched how to reduce the water salinity on this agricultural property. Credit: Orlando Milesi / IPS

Debating the effects of desalination

Since 2010, Chile has been facing a long drought with water deficits of around 30%. There was extreme drought in 2019 and 2021, and the country benefited from a normal period in 2024, although the resource deficit persists, in a country where water management is also privatized.

A report from the Climate and Resilience Center of the public University of Chile, known as CR2, indicated that current rates of groundwater use are higher than the recharge capacity of the aquifers, causing a decline in reserves.

In the 23 already operational desalination plants, seawater is extracted using outfalls that are not very long, installed along the coastline of a shore that has numerous concessions and uses dedicated to aquaculture, artisanal fishermen, and indigenous communities.

The main problem is the discharge of brine following the industrial desalination process.

“I will never be against obtaining water for human consumption. Although this highly concentrated brine that goes to the seabed has an impact where a large part of our benthic resources (organisms from the bottom of water bodies) are located. On a local scale, except in the discharge area, this impact has never been evaluated,” Laura Farías, a researcher at the public University of Concepción and at CR2, told IPS.

“There is literature that points out that there is undoubtedly an impact. There are different stages of biological cycles, from larvae to settled organisms. There is even an impact on pelagic organisms that have the ability to move. And also an impact at the ecosystem level,” the academic specified by telephone from Concepción, a city in central Chile.

She added that this impact is proportional to the volume of desalinated water.

Jesús Basáez, in the municipality of Papudo, poses showing a mature quinoa plant in one hand and in the other a container designed to sell each kilogram of the grain he produces in its white, red, and black varieties. Credit: Orlando Milesi / IPS

According to Farías, the water crisis has led to desalination being part of the solution, despite its impact on marine ecosystems, coastal vegetation, and wildlife.

“It is a maladaptation, because in the end it will have impacts that will affect the coastal inhabitants who depend on those resources,” she emphasized.

There are currently initiatives to legislate on the use of the coastal zone, but according to Farías, they seek to “normalize, regularize, and standardize those impacts, after these plants already exist and there are others seeking approval.”

Palacios, the director of Acades, has a different opinion.

The concerns about the environmental impact of desalination on coastal ecosystems are legitimate, but current evidence and technology demonstrate that this impact can be managed effectively, he says.

“In Chile, recent studies show no evidence that the operation of desalination plants has so far caused significant environmental impacts, thanks to constant monitoring and advanced diffusion systems,” he detailed.

He added that “in most cases, the natural salinity concentration is restored within two or three seconds and at less than 20 meters from the outfalls.”

Palacios explained that research by the Environmental Hub of the University of Playa Ancha “confirms increases in salinity of less than 5% within 100 meters.” And in areas like Caldera, a coastal city in the northern Atacama region, they are “less than 3% within 50 meters, limiting the areas of influence to small zones.”

“We are already implementing the first Clean Production Agreement in desalination and water reuse, promoted together with the (state) Agency for Sustainability and Climate Change, advancing towards voluntary standards for sustainable management, transparency, and strengthening the link with communities,” he emphasized.

Tank trucks being filled with water in front of Osman Bin Affan Mosque in Beirut. Credit: Oriol Andrés Gallart/IPS

By Oriol Andrés Gallart
BEIRUT, Jul 28 2014 (IPS)

In front of Osman Bin Affan Mosque, in a central but narrow street of Beirut, several tank trucks are being filled with large amounts of water. The mosque has its own well, which allows it to pump water directly from the aquifers that cross the Lebanese underground. Once filled, the trucks will start going through the city to supply hundreds of homes and shops.

In a normal year, the water trucks do not appear until September, but this year they have started working even before summer because of the severe drought currently affecting Lebanon.

This comes on top of the increased pressure on the existing water supply due to the presence of more than one million Syrian refugees fleeing the war, exacerbating a situation which may lead to food insecurity and public health problems.“The more we deplete our groundwater reserves, the less we can rely on them in the coming season. If next year we have below average rainfalls, the water conditions will be much worse than today” – Nadim Farajalla of the Issam Fares Institute (IFI)

Rains were scarce last winter. While the annual average in recent decades was above 800 mm, this year it was around 400 mm, making it one of the worst rainfall seasons in the last sixty years.

The paradox is that Lebanon should not suffer from water scarcity. Annual precipitation is about 8,600 million cubic metres while normal water demand ranges between 1,473 and 1,530 million cubic metres per year, according to the Impact of Population Growth and Climate Change on Water Scarcity, Agricultural Output and Food Security report published  in April by the Issam Fares Institute (IFI) at the American University of Beirut.

However, as Nadim Farajalla, Research Director of IFI’s Climate Change and Environment in the Arab World Programme, explains, the country’s inability to store water efficiently, water pollution and its misuse both in agriculture and for domestic purposes, have put great pressure on the resource.

According to Bruno Minjauw, Food and Agriculture Organization (FAO) representative ad interim in the country as well as Resilience Officer, Lebanon “has always been a very wet country. Therefore, the production system has never looked so much at the problem of water.”

Referring to the figures for rainfall, Minjauw says that “what we are seeing is definitely an issue of climate change. Over the years, drought or seasons of scarcity have become more frequent”. In his opinion, the current drought must be taken as a warning: “It is time to manage water in a better way.”

However, he continues, “the good news is that this country is not exploiting its full potential in terms of sustainable water consumption, so there’s plenty of room for improvement.”

Meanwhile, water has become an issue, with scarcity hitting particularly hard the agricultural sector, which accounts for 60 percent of the water consumed despite the sector’s limited impact on the Lebanese economy (agriculture contributed to 5.9% of the country’s gross domestic product in 2011).

“Some municipalities are limiting what farmers can plant,” explains Gabriel Bayram, an agricultural advisor with KDS, a local development consultancy.

Minjauw believes that there is a real danger “in terms of food insecurity because we have more people [like refugees] coming while production is diminishing.” Nevertheless, he points out that the current crisis has increased the interest of government and farmers in “increase the quantity of land using improved irrigation systems, such as the drip irrigation system, which consume much less water.” Drip irrigation saves water – and fertiliser – by allowing water to drip slowly through a network of  tubes that deliver water directly to the base of the plant.

FAO is also working to promote the newest technologies in agriculture within the framework of a 4-year plan to improve food security and stabilise rural livelihoods in Lebanon.

Sheik Osama Chehab, in charge of the Osman Bin Affan Mosque, explains that, 20 years ago, water could be found three metres under the ground surface. “Yesterday,” he told IPS, “we dug 120 metres and did not find a drop.”

Digging wells has long been the main alternative to insufficient public water supplies in Lebanon and, according to the National Water Sector Strategy, there are about 42,000 wells throughout the country, half of which are unlicensed.

However, notes Farajalla “this has led to a drop in the water table and along the coast most [aquifers] are experiencing sea water intrusion, thus contaminating these aquifers for generations to come. The more we deplete our groundwater reserves, the less we can rely on them in the coming season. If next year we have below average rainfalls, the water conditions will be much worse than today.”

Besides, he cautions, “most of these wells have not passed quality tests. Therefore there are also risks that water use could trigger diseases among the population.”

The drought is also exacerbating tensions between host communities and Syrian refugees.

The rural municipality of Barouk, for example, whose springs and river supply water to big areas in Lebanon, today can count on only 30 percent of the usual quantity of water available. However, consumption needs have risen by around 25 percent as a result of the presence of 2,000 refugees and Barouk’s deputy mayor Dr. Marwan Mahmoud explains that this has generated complaints against newcomers.

However, Minjauw believes that “within that worrisome context, there is the possibility to mitigate the conflict and turn it into a win-win situation, employing both host and refugee communities in building long-term solutions for water management and conservation as well as forest maintenance and management. This would be beneficial for Lebanese farmers in the long term while enhancing the livelihoods of suffering people.”

For Farajalla, part of the problem related to water is that “there is a general lack of awareness and knowledge among decision-makers” in Lebanon, and he argues that it is up to civil society to lead the process, pressuring the government for “more transparency and better governance and accountability” in water management.

He claims that “the government failed with this drought by not looking at it earlier.” So far, a cabinet in continuous political crisis has promoted few and ineffective measures to alleviate the drought. One of the most recent ideas was to import water from Turkey, with prohibitive costs.

“Soon, you will also hear about projects to desalinate sea water,” says Farajalla. “Both ideas are silly because in Lebanon we can improve a lot of things before resorting to these drastic measures.”