When the wells on his Ibiza property ran dry, British entrepreneur Hashem Arouzi confronted a crisis that is reshaping life across Europe's tourist islands. Drought, over-extraction and seawater intrusion are draining supplies, leaving thousands of homes without reliable water. Arouzi's response is a machine that pulls drinking water from the air — even in hot, arid conditions.
“In Ibiza alone, there are more than 15,000 properties that are not connected to the water supply, and need to secure their own water,” Arouzi says. “The wells that have previously supplied them are running dry.”
Water deliveries by truck offer temporary relief, but even the reservoirs that supply those trucks are dwindling. Desalination plants increasingly serve mains-connected properties, yet off-grid homes are left behind. “This reflects a global challenge: around the world there are millions of homes that are off-grid and water-stressed — in areas where existing methods of water harvesting would struggle with arid conditions,” Arouzi adds.
A Nobel-winning breakthrough
Unveiled on 30 July in Barcelona, the ARK is a plug-and-play device from Arouzi's company Ahbstra. It claims to harvest up to 500 litres of water per day from the air. Its secret lies in Metal-Organic Frameworks (MOFs), a class of materials that earned the Nobel Prize in Chemistry in 2025. MOFs have an engineered molecular structure with an enormous internal surface area — the equivalent of a football pitch in a single gram. They were developed over decades by Susumu Kitagawa (Kyoto University), Richard Robson (University of Melbourne) and Omar M. Yaghi (University of California, Berkeley).
Conventional atmospheric water generators work like dehumidifiers, cooling air to its dew point. In low humidity, the dew point drops so low that cooling becomes unviable. MOFs are different: they are adsorbents, not condensers. They physically bind water vapour molecules directly from low-humidity air without deep cooling. A modest amount of heat then releases the captured water as liquid.
Yaghi's own company, Atoco, launched the world's first MOF-based water harvester in February 2026. Those units, roughly the size of a shipping container, can produce up to 1,000 litres a day using only ambient thermal energy. They could serve disaster-hit communities and data centres that generate waste heat.
From 'magic material' to market
“For years, MOFs have been a ‘magic material’ on the cusp of delivering vital results for the environment, from water harvesting to carbon capture,” says Arouzi. But high energy requirements previously prevented large-scale use. Ahbstra says its patented Suspended Particle Reactor solves this by cycling air through MOF granules in a fluidised state, maximising performance.
Priced at £150,000 (around €175,000), the ARK is not cheap. But the company argues it could be invaluable for properties at risk of devaluation or abandonment due to water insecurity. The harvested water can replenish wells and cisterns or feed directly into a property's mains system. Both Ahbstra and Atoco are also developing smaller, more affordable units.
This summer, successive heatwaves and droughts have hit many southern European countries hard. According to the European Environment Agency, about 30 per cent of people in the region face permanent water stress. A recent study found that heat, not rainfall shortage, now drives Europe's droughts, compounding the challenge for islands like those in the Balearics and the Mediterranean.
“It’s clear that weather and rainfall patterns are changing, leading to more extreme and prolonged drought conditions in many places,” says Richard Perkin, CTO of Ahbstra. “Tackling this requires a whole-system approach, from water efficiency to recycling and better infrastructure.” But if dams or wells are dry, they can only be refilled when it rains in the right place. “This is why atmospheric water harvesting is a necessary part of the response,” he says.
The technology is not a silver bullet, but it offers a tangible lifeline for off-grid communities across Europe's drought-stricken islands — and potentially beyond.
