The water treatment industry focuses on ensuring clean and safe water for various uses, ranging from drinking water to industrial applications. Companies in this sector include municipal utilities and private firms specializing in advanced technologies, such as desalination and wastewater management. Increasingly, there's a push for sustainable practices, a response to challenges like water scarcity. Innovations are directed towards enhancing efficiency and reducing environmental impact, making it a critical field as global demands for clean water escalate with population growth and climate change concerns.

This article highlights 16 prominent water treatment companies, varying in size from small to large corporations. These firms, founded between 1933 and 2013, are headquartered in regions such as Europe, North America, and Australia. They specialize in drinking water supply, wastewater treatment, and environmental sustainability. Notably, companies like Saur and ChemTreat demonstrate a strong commitment to innovative technologies and sustainable practices, reflecting market demand and regulatory changes. Their geographical reach and tailored services provide significant insights into the industry dynamics.

Read on to learn more about the top water treatment companies.

Top 16 Water Treatment Companies

1. Saur

• Website: saur.com
• Ownership type: Private Equity
• Headquarters: Issy-Les-Moulineaux, Île-De-France, France
• Employee distribution: France 97%, Other 3%
• Latest funding: Other (Debt), $598.0M, October 2024
• Founded year: 1933
• Headcount: 10001+
• LinkedIn: saur

Saur is a water management company based in Issy-Les-Moulineaux, Île-De-France, France, with a workforce of over 6,000 employees. Established in 1933, Saur specializes in providing essential services in drinking water supply and wastewater treatment. The company operates primarily in France, where it manages numerous water service contracts for municipalities, ensuring the delivery of clean drinking water and effective wastewater management. Saur also offers engineering solutions and industrial water services, catering to various sectors including food, chemicals, and pharmaceuticals. With a commitment to sustainability, Saur actively works on protecting water resources and promoting the reuse of treated wastewater. The company has recently secured significant funding, which underscores its ongoing investment in innovation and service enhancement.

2. ChemTreat

• Website: chemtreat.com
• Ownership type: Corporate
• Headquarters: Glen Allen, Virginia, United States (USA)
• Employee distribution: United States (USA) 68%, Mexico 14%, Brazil 8%, Other 11%
• Latest funding: $435.0M, May 2007
• Founded year: 1968
• Headcount: 1001-5000
• LinkedIn: chemtreat-inc-

ChemTreat, Inc., based in Glen Allen, Virginia, is a prominent water treatment company that specializes in industrial water treatment solutions. Established in 1968, ChemTreat has built a reputation for providing tailored services across multiple sectors, including chemical processing, food and beverage, and oil and gas. Their offerings include boiler and cooling water treatment, wastewater management, and advanced monitoring systems. The company employs over 1,400 individuals, with a significant presence in North America and Latin America. ChemTreat is dedicated to innovation, operating a state-of-the-art research and development laboratory that focuses on creating effective water treatment solutions. Their commitment to customer service and technical support is evident in their approach to building long-term relationships with clients, ensuring that they address specific water treatment challenges effectively.

3. South West Water

• Website: southwestwater.co.uk
• Ownership type: Private
• Headquarters: Exeter, England, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 99%
• Founded year: 1989
• Headcount: 1001-5000
• LinkedIn: south-west-water

South West Water is a private utility company based in Exeter, England, established in 1989. It serves approximately 1.8 million customers across Devon, Cornwall, the Isles of Scilly, and parts of Dorset and Somerset. The company specializes in providing essential water supply and wastewater treatment services, ensuring the delivery of clean drinking water and effective sewage disposal. South West Water is committed to addressing environmental concerns and improving service delivery through community engagement. They are involved in various initiatives aimed at enhancing water quality, reducing pollution, and upgrading infrastructure. Their strategic priorities include tackling storm overflows, achieving net zero emissions by 2030, and investing in innovative solutions to manage water resources effectively. The company operates a range of projects, including sewer replacements and improvements to their treatment works, demonstrating their active role in the water treatment sector.

4. Hazen and Sawyer

• Website: hazenandsawyer.com
• Ownership type: Private
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: Other (Grant), $130,000, February 2012
• Founded year: 1951
• Headcount: 1001-5000
• LinkedIn: hazen-and-sawyer

Hazen and Sawyer is a consulting engineering company based in New York City, established in 1951. With a workforce of approximately 1,941 employees, the firm specializes in providing comprehensive water management solutions. Their services cover a wide range of areas, including drinking water, wastewater, and stormwater management, primarily catering to municipal utilities and government agencies. Hazen and Sawyer is recognized for its technical expertise in tackling complex water quality challenges and ensuring compliance with stringent environmental regulations. The company has developed innovative solutions for major metropolitan utilities across the United States, contributing to the delivery of billions of gallons of high-quality drinking water. Their focus on research and development has led to advancements in treatment technologies, including the management of emerging contaminants like PFAS. Hazen and Sawyer's commitment to public health and environmental protection underscores their role as a vital entity in the water treatment industry.

5. Aquafin

• Website: aquafin.be
• Ownership type: Private
• Headquarters: Aartselaar, Flanders, Belgium
• Employee distribution: Belgium 100%
• Founded year: 1990
• Headcount: 1001-5000
• LinkedIn: aquafin

Aquafin, founded in 1990 and based in Aartselaar, Flanders, Belgium, is a private company dedicated to water management, specifically in the area of wastewater treatment. With a workforce of approximately 1,000 to 5,000 employees, Aquafin serves both municipalities and businesses, offering vital water purification and infrastructure development services. The company emphasizes sustainable practices and adheres to stringent environmental regulations, ensuring effective water management for its clients. Aquafin is also involved in research and innovation, contributing to projects that aim to improve water quality and management systems. Their commitment to environmental stewardship and community engagement positions them as a key player in the water treatment industry.

6. Trojan Technologies

• Website: trojantechnologies.com
• Ownership type: Corporate
• Headquarters: London, Ontario, Canada
• Employee distribution: Canada 80%, United States (USA) 7%, Other 14%
• Latest funding: $185.0M, September 2004
• Founded year: 1977
• Headcount: 501-1000
• LinkedIn: trojan-technologies

Trojan Technologies, founded in 1977 and based in London, Ontario, Canada, is a prominent player in the water treatment industry. The company specializes in providing advanced water treatment solutions, particularly through ultraviolet (UV) treatment and advanced oxidation systems. Their products cater to a variety of applications, including municipal wastewater treatment, drinking water purification, and residential water systems. Trojan Technologies serves a wide array of sectors, from municipal water facilities to industrial markets, ensuring compliance with stringent water quality standards. With a workforce of approximately 717 employees, the company has a strong operational presence, primarily in Canada, but also in the United States and other regions. Their innovative approach has led to the installation of over 11,000 municipal TrojanUV systems worldwide, treating a collective flow rate of over 70 billion gallons of water daily. This extensive experience and commitment to water safety underscore their importance in the water treatment sector.

7. IDE Technologies

• Website: ide-tech.com
• Ownership type: Corporate
• Headquarters: Kadima Zoran, Center, Israel
• Employee distribution: Israel 43%, Chile 24%, India 21%, Other 11%
• Latest funding: January 2019
• Founded year: 1965
• Headcount: 201-500
• LinkedIn: ide-technologies-ltd.

IDE Technologies, based in Kadima Zoran, Israel, is a prominent water treatment company specializing in advanced desalination and water treatment solutions for both industrial and municipal clients. With a workforce of approximately 577 employees, the company has been operational since 1965, demonstrating a long-standing commitment to addressing global water challenges. IDE offers a comprehensive range of services, including seawater desalination, wastewater treatment, and operations and maintenance. Their innovative technologies, such as reverse osmosis and thermal desalination, are designed to optimize water recovery and minimize environmental impact. IDE has successfully executed numerous projects worldwide, including notable desalination plants in the USA and Israel. Their business model often involves partnerships with municipalities and industries, focusing on enhancing water security and sustainability. IDE Technologies is recognized for its commitment to reducing carbon footprints and improving water reuse methods, positioning itself as a key player in the water treatment sector.

8. EnviroChemie GmbH

• Website: envirochemie.com
• Ownership type: Private
• Headquarters: Rossdorf, Hesse, Germany
• Employee distribution: Germany 87%, Switzerland 5%, Russia 4%, Other 4%
• Founded year: 1976
• Headcount: 1001-5000
• LinkedIn: envirochemie

EnviroChemie GmbH, based in Rossdorf, Hesse, Germany, is a private company that specializes in industrial water management solutions. Established in 1976, the firm focuses on providing comprehensive services in wastewater treatment, water recycling, and digital monitoring through its innovative WaterExpert platform. EnviroChemie caters to a wide range of industries, including food and beverage, pharmaceuticals, and renewable energy, helping clients meet stringent environmental regulations while optimizing water usage. The company is part of the EnviroWater Group, a network of experts dedicated to sustainable water use in various sectors. With a workforce of around 187 employees, EnviroChemie is committed to delivering tailored solutions that enhance operational efficiency and reduce environmental impact.

9. Biwater

• Website: biwater.com
• Ownership type: Private
• Headquarters: Dorking, England, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 23%, Morocco 20%, Nicaragua 16%, Other 41%
• Founded year: 1968
• Headcount: 501-1000
• LinkedIn: biwater

Biwater is a private water treatment company based in Dorking, England, established in 1968. The firm specializes in sustainable solutions for water and wastewater management, serving a wide range of clients including governments, organizations, and communities worldwide. With a portfolio of over 25,000 projects delivered globally, Biwater has built a reputation for addressing critical water and sanitation challenges through innovative engineering and strategic partnerships. Their services include water treatment, wastewater treatment, desalination, and modular treatment plants, among others. Biwater's commitment to environmental sustainability and community engagement is evident in their project approach, which emphasizes local stakeholder involvement and adherence to British standards. The company has a significant international presence, with employees distributed across various countries, including Morocco, Nicaragua, and Sudan. Biwater's recognition in the industry, such as receiving the Desalination Company of the Year award, further underscores its active role in the water treatment sector.

10. Kurita America

• Website: kuritaamerica.com
• Ownership type: Private
• Headquarters: Minneapolis, Minnesota, United States (USA)
• Employee distribution: United States (USA) 98%, Canada 2%
• Founded year: 1949
• Headcount: 501-1000
• LinkedIn: kurita-america-inc.

Kurita America, based in Minneapolis, Minnesota, is a water treatment solutions provider that has been operational since 1949. The company specializes in delivering a wide range of services and products aimed at enhancing water quality and promoting sustainability across various sectors, including biofuels, healthcare, food and beverage, and heavy industry. With a workforce of approximately 382 employees, Kurita America focuses on helping businesses comply with environmental regulations while improving operational efficiency. Their innovative approach, known as the Total Solutions method, integrates chemistry, equipment, engineering, and services to address complex water treatment challenges. Kurita America is part of the larger Kurita Group, which is recognized for its expertise in water treatment chemicals and technologies. The company actively engages in initiatives that promote shared value and sustainability, reflecting its commitment to creating a positive impact on both customers and the environment.

11. Osmoflo

• Website: osmoflo.com
• Ownership type: Corporate
• Headquarters: Burton, South Australia, Australia
• Employee distribution: Australia 60%, India 27%, United Arab Emirates 8%, Other 5%
• Latest funding: December 2016
• Founded year: 1991
• Headcount: 201-500
• LinkedIn: osmoflo-pty-ltd

Osmoflo, established in 1991 and headquartered in Burton, South Australia, is a water treatment company that specializes in providing efficient, sustainable, and scalable solutions for water and wastewater management. The company serves a variety of industries, including mining, energy, and municipal sectors, by offering tailored services such as emergency water rentals and comprehensive operations and maintenance. With a portfolio of over 600 completed projects worldwide, Osmoflo has developed a strong presence in the global market, operating offices in Australia, India, the UAE, and Saudi Arabia. The company is committed to addressing water scarcity challenges through innovative technologies and a focus on sustainability. Their proprietary systems, like the OASIS audit service for water assets, enhance the longevity and efficiency of water treatment facilities. Osmoflo's strategic partnerships and ongoing projects, such as the recent contract with Rio Tinto for the Dampier Seawater Desalination Plant, further demonstrate their active role in the water treatment industry.

12. Abu Dhabi Sewerage Services Company (ADSSC)

• Website: adssc.ae
• Ownership type: Private
• Headquarters: Abu Dhabi, Abu Dhabi, United Arab Emirates (UAE)
• Founded year: 2005
• Headcount: 501-1000
• LinkedIn: abu-dhabi-sewerage-services-company-adssc-

Abu Dhabi Sewerage Services Company (ADSSC), rebranded as TAQA Water Solutions in 2024, is a private utility provider based in Abu Dhabi, UAE. Founded in 2005, the company specializes in sustainable water management and wastewater treatment. It operates a vast network that includes over 13,000 kilometers of sewage systems and 42 treatment plants, processing more than 1.3 million cubic meters of wastewater daily. TAQA Water Solutions is committed to transforming wastewater into a valuable resource, supporting various applications such as irrigation and industrial use. The company aligns its operations with the UAE's climate goals and has made significant strides in recycling water, aiming for 100% recycling in the future. Their focus on innovation and sustainability positions them as a key player in enhancing water infrastructure and promoting responsible water use in the region.

13. Aquatec Maxcon

• Website: aquatecmaxcon.com.au
• Ownership type: Private
• Headquarters: Wulkuraka, Queensland, Australia
• Employee distribution: Australia 97%, United Kingdom (UK) 3%
• Founded year: 1970
• Headcount: 201-500
• LinkedIn: aquatec-maxcon-pty-ltd

Aquatec Maxcon Pty Ltd, based in Wulkuraka, Queensland, Australia, specializes in water and wastewater technology and equipment. Established in 1970, the company has developed a robust portfolio of services that includes engineering, project management, and installation tailored for both municipal and industrial clients. Their offerings cover a wide array of advanced water treatment technologies, such as coagulation, flocculation, sedimentation, and various filtration processes. They also focus on wastewater treatment solutions, including aeration, clarification, and biosolids management. Notably, Aquatec Maxcon is involved in waste-to-energy projects, reflecting their commitment to sustainable practices. The company operates primarily in Australia, with a small presence in the UK, and has successfully completed projects in several countries, including New Zealand and Papua New Guinea. Their extensive experience and innovative approach position them as a significant player in the water treatment industry.

14. WEC Water

• Website: wecprojects.com
• Ownership type: Private
• Headquarters: Johannesburg, Gauteng, South Africa
• Employee distribution: South Africa 100%
• Founded year: 2002
• Headcount: 51-200
• LinkedIn: wec-water

WEC Water, based in Johannesburg, South Africa, specializes in innovative water and wastewater management solutions. Founded in 2002, the company has grown to employ between 51 and 200 staff members, focusing on sectors such as mining, healthcare, and education. WEC Water offers a range of services, including water treatment, sewage treatment, effluent treatment, and resource beneficiation. Their operations extend across multiple African countries, including South Africa, Botswana, Lesotho, Côte d’Ivoire, Mali, and Ghana. The company prides itself on its ability to analyze water quality meticulously and provide tailored solutions that address the unique challenges faced by each client. With over 410 projects completed and a commitment to engineering sustainable water solutions, WEC Water has positioned itself as a reliable partner in the water treatment industry.

15. Waterleau

• Website: waterleau.com
• Ownership type: Corporate
• Headquarters: Haacht, Flanders, Belgium
• Employee distribution: Morocco 41%, Belgium 34%, South Africa 6%, Other 19%
• Latest funding: July 2019
• Founded year: 2000
• Headcount: 201-500
• LinkedIn: waterleau

Waterleau, based in Haacht, Belgium, is a water technology company that specializes in water treatment and wastewater management solutions. Established in 2000, the company has grown to employ around 409 people, with a significant portion of its workforce located in Morocco and other African nations. Waterleau offers a comprehensive range of services, including wastewater treatment, drinking water production, and energy recovery from wastewater. Their clientele includes various industries and municipalities, all seeking to optimize water usage and adhere to environmental regulations. The company employs innovative technologies and consulting services to enhance water resource management, demonstrating a commitment to sustainability and efficiency. Waterleau also emphasizes the importance of reducing water footprints, which aligns with global environmental goals. Their proprietary technologies, such as the SmartLab® system, enable real-time monitoring and optimization of treatment facilities, further solidifying their role in the water treatment industry.

16. Gradiant

• Website: gradiant.com
• Ownership type: Venture Capital
• Headquarters: Woburn, Massachusetts, United States (USA)
• Employee distribution: India 33%, Singapore 25%, United Arab Emirates 11%, Other 31%
• Latest funding: Series D, $225.0M, May 2023
• Founded year: 2013
• Headcount: 501-1000
• LinkedIn: gradiant-corporation

Gradiant is a water treatment company based in Woburn, Massachusetts, founded in 2013. The firm specializes in advanced solutions for industrial water and wastewater management, catering to essential sectors such as semiconductors and pharmaceuticals. Gradiant's mission is to reduce water usage, reclaim valuable resources, and renew wastewater, all while emphasizing sustainability and innovation. The company offers a comprehensive suite of services, including customized chemical formulations and cutting-edge treatment technologies. With a workforce of approximately 601 employees and a significant presence in countries like India, Singapore, and the UAE, Gradiant is well-positioned to tackle global water scarcity challenges. Their recent Series D funding of $225 million in May 2023 further underscores their growth potential and commitment to enhancing water treatment solutions.

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