Water in United Arab Emirates

The Emirates run one of the most engineered water systems on earth, and one of the thirstiest per head. With about 18 m³ of renewable water per person, nearly everything that comes out of a tap was made.²³ Desalination meets the cities' needs, treated effluent greens the landscape, and the remaining groundwater is largely brackish and falling. The UAE's answer is characteristic: build the world's biggest RO plants, cut the energy per drop, and legislate demand down through the Water Security Strategy 2036.

A quick-reference dashboard for United Arab Emirates: headline economy and water indicators⁴⁵⁴⁶, water stress against the scarcity thresholds, non-conventional supply, and the institutions behind the sector. The commercial picture, with buyers, deal structures and the project pipeline, is in the market brief.

One interactive map of United Arab Emirates's water, built from real geodata. Climate & drought maps the aridity gradient (WorldClim) with warming projections. The WRI Aqueduct layers, covering overall water risk, water stress and flood risk (plus groundwater decline where the trend is significant), shade every river sub-basin by its 0–5 risk score. Demand shows where the population, and the water demand, concentrate. Infrastructure brings the physical system together: rivers, dams (FAO AQUASTAT), treatment plants, desalination and the major conveyors. Hover any sub-basin or marker for detail; sources are cited under each view.

The UAE covers about 83,600 km², including about 5,900 km² of islands.²² Abu Dhabi emirate makes up almost 87% of the mainland.²² FAO describes three zones: the north-eastern mountains, the sand desert and the coast. Desert covers 80% of the country.²² Six emirates face the Gulf, a shallow sea with many islands and coral reefs, and Fujairah faces the Gulf of Oman.²² About 85% of the population and more than 90% of infrastructure sit on the coast.²

Rainfall

Mean annual rainfall is about 78 mm. It ranges from under 40 mm around Liwa to 160 mm in the north-eastern mountains, and falls on only 9–19 days a year.²² More than 80% falls between December and March.²² Summer rain is orographic, forming over the mountains.¹ Extremes are growing. In April 2024 the National Centre of Meteorology reported up to 250 mm of rain, the highest ever recorded in the country.² Khatm Al Shakla near Al Ain received about 256 mm in 24 hours.⁴

Heat

On the coast, summer temperatures reach 46 °C with humidity up to 100%, and winters run 14–23 °C. The interior reaches about 50 °C in summer and around 4 °C in winter.²² In summer, the Indian monsoon low and the thermal low over the Empty Quarter dominate the weather.¹ From mid-June to mid-August, Al Samoom winds push daytime temperatures above 48 °C.⁵ The May record is 51.6 °C, set at Sweihan in 2025.⁵ In early August 2026 Owtaid in Al Dhafra reached 50.1 °C.⁶ The NDC notes that the UAE is warming significantly faster than the global average.²

Projections and the coast

In the World Bank’s CMIP6 ensemble, days above 35 °C rise from about 183 a year in 1995–2014 to about 241 by 2080–2099 under high emissions.³ Downscaled national modelling projects summers 2–3 °C hotter by 2060–2079, with humidity about 10% higher.¹ A study cited in the NDC found that up to 6% of the populated and developed coastline could be lost by 2100.² Rising seas threaten critical infrastructure, including desalination plants and power stations.²

Rainfall and temperature in numbers

Averaged over the whole of United Arab Emirates, ERA5 reanalysis gives about 47 mm of rain a year and a mean temperature of 28.0 °C for 1991–2020. About 63% of that rain falls in January, February and March, and 7 months average less than 5 mm. Since 1971 the country has warmed by about 0.48 °C a decade. At such low totals, percentage changes in rainfall between decades mean little in absolute terms.

Projected change

Source: World Bank Climate Change Knowledge Portal, retrieved September 2026. ERA5 0.25° reanalysis for the annual series (1950–2022) and the monthly climatology (1991–2020); CMIP6 0.25° multi-model ensemble median for the projections, as change against 1995–2014. These are national averages, which hide the gap between wet highlands and dry interiors, and reanalysis rainfall over deserts carries wide uncertainty.

Made, not found

Renewable water totals only about 150 million m³ a year, and there are no perennial streams.²² The fresh aquifers lie in alluvial fans at the foot of the Oman and Ras Al Khaimah mountains. Their upper and lower layers each run 200–800 m thick.²² In the western desert, the Dammam and Umm er Radhuma aquifers hold highly saline water.²² In 2023 total supply was 4.8 billion m³: 41% desalinated and 46% groundwater, with the rest from rain and treated wastewater.⁷ Reuse of treated wastewater reached 77% by 2024, against a target of 95% by 2036.² Abu Dhabi’s aquifer-storage scheme banks desalinated water underground as a strategic reserve.³⁹

Before desalination, Abu Dhabi lived on hand-dug wells and aflaj, and those falaj tunnels are now all dry.²² The first desalination plant opened in Abu Dhabi in 1976 with a capacity of 250 m³ a day.²² Output grew from 385 million m³ in 1995 to 950 million m³ in 2005.²² By the early 2020s national capacity stood at about 8.9 million m³ a day, most of it thermal.²³ Estimates of desalination’s share vary with definitions. CSIS put it at 42% of drinking water and 52.1% of total demand in 2026.²⁵ A Reuters factbox gave more than 80% of potable water.²⁷

Groundwater and the farm boom

In 2003 Abu Dhabi emirate used 3,382 million m³. Irrigation of farms, forestry and amenities took 83%, municipal supply 15% and industry under 2%.²² More than 70% of that water was groundwater.²² Between 1994 and 2003 the national agricultural area more than tripled, to 260,732 ha, with 76,556 wells in use.²² Over-abstraction lowered water tables, and seawater intrusion grew along the coasts.²² Renewable resources are only about 150 million m³ a year.²²

Abu Dhabi has moved to restrain pumping. In January 2019 its environment agency launched a groundwater atlas built on an inventory of more than 118,000 wells, aiming to halve farm water use.³² In April 2025 it banned well drilling in protected zones under the 2016 groundwater law.³⁴

Demand and price

UAE residents were said to use 550 litres a day in 2014, against an international average of 170–300 litres.³⁵ A 2026 estimate put use at 520 litres.²⁶ Abu Dhabi’s tariff reform of January 2015 made Emiratis pay for water for the first time. Low-use expatriate rates rose from Dh2.2 to Dh5.95 per 1,000 litres.³⁵ From January 2017 Emiratis paid Dh2.09 per 1,000 litres in the lower band and Dh2.60 above it, and expatriates Dh7.84 and Dh10.41.³⁶ The same rates were set out again in the schedule for 1 January 2025.³⁷ The Water Security Strategy 2036 aims to cut total water demand by 21%.⁴⁰ Treatment plants handled about 653 million m³ of wastewater a year around 2020, against a capacity of about 840 million m³.²³

Withdrawals over time

FAO’s AQUASTAT estimates put United Arab Emirates’s freshwater withdrawals at 900 million m³ in 1980 and 2,265 million m³ in 2022. Agriculture’s share of the total moved from 74% in 1984 to 51% in 2022.

Source: FAO AQUASTAT via the World Bank World Development Indicators, retrieved September 2026. AQUASTAT revises national figures irregularly and fills the years between surveys, so a jump between two adjacent years usually marks a new national estimate rather than a change on the ground.

Utilities in each emirate procure the plants. Dubai’s DEWA reached 555 million imperial gallons a day (MIGD) of installed desalination capacity in early 2026.⁸ Reverse osmosis makes up 23% of that capacity, and DEWA plans 735 MIGD by 2030.⁹ Its first independent water producer, the 180 MIGD Hassyan seawater reverse osmosis plant, is led by ACWA Power with DEWA holding 60%, and reached financial close in April 2024.¹⁰ Phase one was 90% complete by January 2026, with all phases due in early 2027.¹¹ Its first 60 MIGD came online in the first half of 2026.⁹

Abu Dhabi and the northern emirates

In Abu Dhabi, the Taweelah reverse osmosis plant was designed to supply 909,200 m³ a day, as the world’s largest seawater desalination plant.¹² Engie developed the US$800 million Mirfa 2 plant, and EWEC received three bids for Shuweihat S4 in 2022.¹³¹⁴ The new Al Nouf complex is planned as a major hub for power and water.¹⁵ In the northern emirates, EtihadWE is procuring the 60 MIGD Fujairah I plant for Dh1.046 billion, after the 150 MIGD Naqa’a plant.¹⁶

Sewers, networks and dams

Dubai is extending its strategic sewerage tunnels, which carry sewage by gravity to the main treatment plants. Bids for phase two were sought in January 2026.¹⁷ DEWA cut transmission and distribution losses from 42.5% in 1989 to 4.4% in 2025. It reads more than 1.1 million smart meters every 15 minutes.¹⁸ Nationally, water losses were down to 11% by 2024.² FAO counted 114 recharge dams and embankments in 2003, with 118 million m³ of capacity but only 12.3 million m³ stored.²² A hydrological study of 22 basins on the northern and eastern coasts is informing new flood works.²

The asset base in numbers

Sources: FAO AQUASTAT regional dam inventories (CC BY 4.0), which list large dams with a published capacity and can lag recent construction; the MENA Water Review major projects register, where each record cites its source on the project page. The database follows large contracted projects, not the whole asset base.

Over-pumping has turned groundwater saltier. In the Western Gravel Aquifer around Al Ain, salinity ranges from 500 to 6,000 mg/L, and water levels have fallen by up to 50 m.²⁴ At Wadi Ham in Fujairah, heavier pumping at the Kalba well field drew seawater into the coastal aquifer.²³

Algae, brine and the sea

Desalination turns seawater quality into a supply question. A harmful algal bloom lasted from August 2008 to August 2009.²⁹ At Fujairah 1, the reverse-osmosis plant shut for more than a week while thermal units kept running.²⁸ Red tide stopped the Kalba plants again in March 2013, and the utility raised well production to compensate.³³

The Gulf hosts about half of the world’s seawater desalination capacity. Brine has raised mean basin salinity by only 0.43 g/kg, but by about 4.3 g/kg in the south-western Gulf near the Arabian coast.³⁰ A 2020 model study found basin salinity resilient to present brine discharge under the current climate.³¹ In 2006 the whole population had access to improved water sources.²²

The reported indicators

Sources: WHO/UNICEF Joint Monitoring Programme via the World Bank; SDG 6.3.1 and 6.3.2 from the UN Statistics Division SDG database, retrieved September 2026. Safely managed means an improved source on the premises, available when needed and free from priority contamination. SDG 6.3.2 rests on each country’s own monitoring network, so a high share can mean few water bodies were assessed, and values move when methods change between reporting rounds.

The UAE has no perennial rivers. Its shared waters are aquifers with Oman and, to the south, with Saudi Arabia and Yemen, and none is covered by an agreement.²⁴ About 61,000 km² of the southern Umm er Radhuma–Dammam system lies in the UAE, which abstracts an average of 7.7 million m³ a year.²⁴ The Western Gravel Aquifer along the Oman border is heavily overdrawn around Al Ain, and efforts to launch joint management have failed.²⁴ In 2018 Abu Dhabi’s water grid was not connected to any neighbouring network.³⁸

Storage and the 2026 war

Abu Dhabi’s answer to isolation is storage. The Liwa reserve, completed in January 2018, holds more than 26 million m³ of desalinated water in the aquifer, recovered through 315 wells.³⁹ It was sized to supply one million people with 180 litres a day for up to 90 days.³⁸ Analysts disagree on what that buys. Spread across the whole country, it would cover only about four days of consumption.²⁶

The 2026 war tested the model. Early on, the Fujairah F1 power and water complex was reportedly damaged by missiles or falling debris, but kept operating.²⁵ An attack on Jebel Ali port landed close to 43 desalination units.²⁶ By late April damage from Gulf desalination attacks remained limited, with no significant disruption to supply reported.²⁶ That month GCC leaders asked for faster work on water interconnection and strategic reserves.⁴¹

The record

Shared aquifers

• Umm er Radhuma-Dammam Aquifer System (Centre): GulfBahrain, Qatar, Saudi Arabia, UAE · data good
• Umm er Radhuma-Dammam Aquifer System (South): Rub' al KhaliOman, Saudi Arabia, UAE, Yemen · data moderate

Source: IGRAC and UNESCO, Transboundary Aquifers of the World. Data reliability is IGRAC’s own assessment of the information behind each outline.

Water is run emirate by emirate. In 2017 four authorities supplied water and power: ADWEA in Abu Dhabi, DEWA in Dubai, SEWA in Sharjah and FEWA in the northern emirates.¹ FEWA is now EtihadWE, wholly owned by the Emirates Investment Authority.¹⁶ In Abu Dhabi a single buyer purchased all water and power from licensed producers.¹ The Abu Dhabi Department of Energy was set up under Law No. 11 of 2018.¹⁹ Abu Dhabi Local Law No. 5 of 2016 regulates groundwater.²⁰ The federal Ministry of Climate Change and Environment was created in 2016.¹

Strategy

The UAE Water Security Strategy 2036 aims to cut total demand by 21% and raise reuse of treated water to 95%.⁴⁰ It also targets water productivity of US$110 per m³ and national storage of up to two days.⁴⁰ Other reporting describes storage for more than 45 days in extreme emergencies.¹⁶ The national demand management programme had cut water use by 513 million m³ by 2024.² In June 2026 Abu Dhabi launched a water and energy resilience framework with 15 strategic measures.²¹ DEWA works to an Integrated Water Resources Management Strategy 2030.¹¹

The UAE’s challenge is no longer basic supply but resilience. Almost all its water is made or mined, and the coast that hosts its plants faces rising seas.²²² Days above 35 °C could reach about 241 a year by the end of the century under high emissions.³

The strategy points to lower demand, near-total reuse and deeper storage. Reverse osmosis is replacing thermal plants, and smart networks are cutting losses.⁹¹⁸ Expect the UAE to remain the region’s reference market for what water technology can do when capital is not the constraint.