The rise in urbanization and water supply demand have made it necessary to look for ways to get drinking water beyond the conventional freshwater sources. Converting sea water into potable water is one option to ensure water security for the growing population, especially in regions prone to scanty rainfall and arid weather conditions.

This is where seawater desalination plants have a critical role to play.  According to our Global desalination market outlook, there are about 22,000 operational sea water desalination plants worldwide facilitating freshwater to over 300 million people. In 2022-23 alone, about 356 new desalinations plants were awarded to desalination companies. Considering this additional capacity, the total global desalination capacity is estimated to be 109.22 million m3/day.

In this blog we will cover the desalination and water treatment companies that are fulfilling the clean water needs through advanced desalination projects worldwide. 

Top Desalination Water Companies in the World [2025]

Top 10 Desalination Companies in the World

The top desalination plant companies in the world are listed alphabetically: 

Acciona

Acciona is one of the largest desalination companies known to provide sustainable water treatment solutions worldwide. It is known as one of the best desalination company that provides construction and operation of reverse osmosis desalination projects, water treatment plants and wastewater treatment plants.

Acciona has established several seawater desalination plant projects in more than 40 countries including Saudi Arabia and UAE.    

Major Desalination Plants

On 8th April 2025, ACCIONA launched its advanced turbidity prediction system for its desalination plants. This system enhances operational efficiency and water quality management through two distinct models to forecast seawater turbidity levels accurately.
 

On 25th July 2025, Acciona finalized contracts to build a 5.3 GL/ year desalination plant in partnership with McConnell Dowell on the Eyre Peninsula in Australia.

On 8th May 2025, Acciona signed financing for the Casablanca desalination plant in Morocco. This project will be managed by Al Baidaa Desalination Company which a consortium of Acciona with 50% share, Green of Africa 45%, and AfriquiaGaz 5% share. This project will produce 300 million m³ per year powered by renewables and is expected to be completed by 2028.

Abengoa

Abengoa is an EPC (Engineering, Procurement and Construction) company known for its innovative technological solutions in water treatment plants. It provides services in infrastructure, energy and water sectors. Its advanced water solutions include large desalination plants, wastewater treatment plants and hydraulic infrastructures.

Abengoa has a global desalination capacity of 4,400,000 m3/day and was ranked fourth in 2020 and 2021 by IDA Water Security Handbook and Global Water Intelligence Magazine. It was ranked first in the Treatment & Desalination category in ENR's Top International Contractors Ranking for 2021. It has built about 30 desalination plants in the US, India, Middle East, China, Africa and Spain. Currently, several water treatment plants are under construction in Saudi Arabia, UAE and Morocco.

Major Desalination Plants

Doosan Heavy

Doosan Heavy Industry is one of the best seawater desalination company that is headquartered in South Korea. It entered the desalination industry in 2000 and expanded across the Middle East. This includes Jebel Ali water treatment plant in UAE, Fujairah water desalination plant and Shoaiba in Saudi Arabia.

Major Desalination Plants

Yanbu 4 - 450,000 m3/day -  Saudi Arabia

On 27th June 2025, Doosan announced it signed for construction of a desalination plant in Iran with Sazeh Sazan, valued at 220 billion won (USD 158.4 million).

On 21st January 2025, Doosan signed a MoU with Hassan Allam and Almar Water Solutions for a SWRO desalination project in Ismailia, Egypt hat will produce 1 million tons/day.

Dubai Electricity and Water Authority

The Dubai Electricity and Water Authority (DEWA) is one of the major providers of electricity and water in Dubai. Owned by the government of Dubai, this entity was formed in 1992 through a merger between Dubai Electricity Company and Dubai Water Department. It is one of the seawater desalination plant manufacturers in the world.

DEWA's core objectives include building, maintaining, operating and maintaining electricity and water desalination plants that will supply throughout the distribution networks of Dubai. DEWA has an installed electricity capacity of 11,400 MW and 470 MIGD of desalinated water per day.  

Major Desalination Plants

Jebel Ali Desalination Plant - 2,227,587 m3/day - UAE

​In February 2025, DEWA conducted inspection of the first phase of the SWRO plant at the Hassyan Complex. About 55% project construction has been completed and is expected to commence operations by 2027. 
 

IDE Technologies

The IDE Technologies is one of the global leaders in the desalination industry with most advanced thermal and membrane desalination plants. It is renowned to provide cost-effective desalination plants around the world. Over 60 years of expertise, IDE Technologies records over 400 water treatment plants in 40 countries. Few of their largest desalination plants are located in Israel, China, Australia, India and the US. 

Through various water treatment plants worldwide, it delivers about 3 million m3/day of potable drinking water. The company is known for their extensive IP Portfolio with more than 90 granted patents and an advanced R&D center.

Major Desalination Plants

In September 2025, IDE Technologies submitted its Expressions of Interest (EOIs) for the Brihanmumbai Municipal Corporation’s second SWRO desalination plant (200 MLD) in Versova, Mumbai, India.

On 18th March 2025, ​IDE Water Technologies announced that the Sorek 2 - Be’er Miriam Desalination Plant in Israel is now operational with a capacity of 200 million cubic meters annually and is world's first steam-driven seawater reverse osmosis (SWRO) plant, featuring advanced technologies.  

Metito

Metito is one of the popular desalination water companies that introduced reverse osmosis desalination technology outside the USA in 1972. It is known to build large scale desalination plants across the world. Through expertise it developed advanced chemical solutions that will treat brackish groundwater, seawater, fresh water and industrial water. It further incorporated these chemical solutions into desalination methods into thermal and membrane desalination processes.

Major Desalination Plants

Saline Water Conversion Corporation

The Saline Water Conversion Corporation (SWCC) is a Saudi Arabian government owned entity that produces desalinated seawater through several desalination plants across the Kingdom of Saudi Arabia. 

It holds several world records in the desalination industry and produces a total 4.6 Million cubic meters of desalinated water per day. SWCC operates 28 desalination plants across 17 different locations in eastern and western coasts of Saudi Arabia and produces 69% of total desalinated water production in KSA. 

Major Desalination Plants

Suez International

Suez International is one of the biggest desalination companies in Denmark. It serves in water treatment and waste management solutions. Suez International is known to deliver cost-effective desalination plants with advanced seawater desalination technology that can overcome water scarcity issues.  

For more than 160 years, Suez International has provided membrane desalination technology that will retain concentrated brine providing clean drinking water. 

Major Desalination Plants

On 20th May 2025, Suez debuted in Taiwan's desalination market with the groundbreaking for Taiwan’s first large-scale municipal reverse osmosis desalination plant in Hsinchu.

On 28th April 2025, Suez began the operations of China’s largest industrial membrane-based seawater desalination plant in Penglai, Yantai, with a capacity of 300,000 m³/day.

On 7th April 2025, Suez announced the commencement of largest seawater desalination plant in Metro Iloilo, Philippines with Metro Pacific Water, wastewater Pacific Investments Corp (MPIC). The construction is expected to complete in 24 months. Details like capacity are yet to be disclosed. 

In January 2025, a consortium led by Meridiam and Suez signed a 30-year concession contract with Jordan. Under this contract, the consortium will develop the Aqaba–Amman Water Desalination and Conveyance Project, with 851,000 m³/day capacity and EUR 4 billion funding.

Veolia Water

Veolia is one of the prominent leaders in the water treatment and desalination industry. It provides its operations across the globe, majorly in the Middle East and UAE. For more than 50 years, Veolia implemented various desalination strategies and promoted desalination as a reliable source of drinking water. 

It provides RO (Reverse Osmosis) and thermal desalination technology based desalination plants through their subsidiaries SIDEM and Entropie.  Veolia Water is known to serve design, procurement, engineering, construction, commissioning, operation and maintenance of large scale desalination plants worldwide. 

Major Desalination Plants

Revenue 2023- EUR 45.3 Billion

Desalinated Water provided: 113 million inhabitants

On 7th May 2025, Veolia agreed to acquire the remaining 30% stake in its Water Technologies & Solutions (WT&S) unit for USD 1.75 billion, gaining full ownership. It secured USD 750 million in new contracts in sectors including microelectronics, San Francisco, Brazil, and the UAE.

On 15th April 2025, Veolia announced its plans to double its Australian operational capacity, expand desalination and recycling infrastructure, and deploy AI-enabled energy-efficient desal units.

VA Tech Wabag

The VA Tech Wabag is an industry leader in desalination plants. It oversees EPC (Engineering, Procurement and Construction) and has a record of executing 6500 municipal and industrial desalination plants. VA Tech Wabag has dedicated R&D sectors in Europe and India. 

Wabag is one of the largest water desalination companies in the world with a total 1,000,000 m3 of desalinated water everyday. This desalinated water is supplied to over 3.5 million people globally avoiding water scarcity and providing water security. 

Major Desalination Plants

On 13th March 2025, ​VA Tech Wabag secured two orders worth INR 360 crores from GAIL (India) Ltd and Indian Oil Corporation Ltd (IOCL). The first order is valued at INR 200 crores from GAIL for the design, engineering, procurement, construction, and commissioning of a wastewater treatment plant at their Pata petrochemical complex in Uttar Pradesh.

The second order if from IOCL worth around INR 160 crore for the operation and maintenance of an effluent treatment plant at their Paradip refinery in Odisha. This contract term is stated as 5 years. 

Conclusion

The desalination companies like Veolia Water, Metito, Acciona Agua, American Water Works, General Electric company and Doosan Heavy continue to expand their horizons with new inventions and innovations in the desalination sector. Major desalination companies are focusing on the Middle East and Asian regions that receive scanty rainfall and are a rich source of seawater to conduct the desalination process. Thus, desalination plant companies to overcome the water shortage providing water security through desalination plants.

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