Are the world’s leading water treatment EPC contractors keeping pace with the rising demand for clean water? Which global firms are delivering the most advanced, efficient and sustainable treatment solutions? And how are these contractors shaping the future of municipal and industrial water infrastructure in 2025? These questions matter more than ever as countries face growing water scarcity, urbanization and environmental challenges.
This article provides clear, up-to-date insights into the top EPC companies driving innovation in water treatment plant design, engineering, procurement and construction. You will quickly learn who the industry leaders are, what sets them apart and why they continue to win major projects worldwide.
Below, we explore the Top 10 Water Treatment Plant EPC Contractors in the World 2025—a concise guide to the companies shaping global water management. Keep reading to discover the key players and find the right industry partners for your future projects.
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Company Name |
Headquarters |
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1. Xylem Inc. |
Washington, D.C., USA |
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2. Aquatech |
Canonsburg, Pennsylvania, USA |
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Changwon, Gyeongsangnam-do, South Korea |
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Kansas City, Missouri, USA |
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Aubervilliers / Paris region, France |
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6. SUEZ |
La Défense (Paris region), France |
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7. ACCIONA Agua |
Alcobendas / Madrid region, Spain |
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Kadima, Israel |
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9. Metito |
Dubai, United Arab Emirates |
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Zhengzhou, Henan Province, China |
Company Profile:
Xylem is a global water-technology company that supplies equipment, integrated systems and project services for municipal and industrial water and wastewater treatment. The company combines a broad portfolio of market-leading product brands (pumps, mobile and packaged treatment units, filtration, membrane systems, chemical-free disinfection and analytics) with design, consultancy and project-management capabilities to deliver turnkey water solutions—from feasibility and detailed design through installation, commissioning and long-term O&M. Xylem’s strengths for water-treatment EPC work include deep pump and hydraulics expertise (heritage brands such as Flygt and Goulds), system integration skills, digital monitoring and analytics for plant optimization, and global delivery capacity across utilities and industrial clients. This makes Xylem well suited to act as a single-source supplier or a turnkey partner on water-treatment and reuse projects worldwide.
Establishment: 2011
Headquarters: Washington, D.C., USA
Main Products:
Company Profile:
Aquatech is a global water-technology and EPC solutions provider specializing in industrial and infrastructure water projects, with proven strengths in water reuse, zero-liquid-discharge (ZLD), desalination, and critical-minerals recovery. The company offers integrated services across feasibility, detailed design, modular and site-built systems, project financing, installation, commissioning and long-term O&M. Aquatech’s competitive advantages for water-treatment EPC work include decades of ZLD and membrane experience, modular “mobile” treatment fleets for rapid deployment, advanced membrane and thermal technologies (ultrafiltration, RO, evaporators, crystallizers), and digital optimization tools for plant performance—making it a strong turnkey partner for industrial, energy and municipal clients worldwide. :contentReference[oaicite:0]{index=0}
Establishment: 1981
Headquarters: Canonsburg, Pennsylvania, USA
Main Products:
Company Profile:
Doosan Enerbility is a leading global EPC contractor for power and water projects, with a strong legacy in heavy industry and decades-long expertise in seawater desalination and water-treatment plants. The company delivers full-scope EPC services — from design and procurement to construction, commissioning and long-term operation & maintenance (O&M). Its water-treatment offerings span seawater desalination (using Reverse Osmosis (RO), Multi-Stage Flash (MSF), and Multi-Effect Distillation (MED) technologies), membrane-based wastewater & reuse systems (including MBR), industrial wastewater treatment, zero-liquid-discharge (ZLD) systems, and municipal wastewater reclaimation. Doosan’s competitive advantages include a deep heritage in large-scale infrastructure and power-plant construction, combined with global delivery capability, well-established water-engineering know-how, and a diversified project portfolio across the Middle East, Asia and beyond.
Establishment: 1962
Headquarters: Changwon, Gyeongsangnam-do, South Korea
Main Products:
Company Profile:
Burns & McDonnell is a 100% employee-owned engineering, architecture and construction firm with a long history of delivering design-build and EPC water and wastewater infrastructure. The company provides end-to-end services—feasibility and planning, detailed engineering, procurement, construction, commissioning and long-term O&M—for municipal and industrial clients. Its water practice covers water- and wastewater-treatment plants, combined sewer overflow and stormwater programs, aquifer supply development, water reuse and industrial process-water systems. Burns & McDonnell’s strengths for EPC delivery include deep design-build experience, integrated construction capabilities, broad multidisciplinary teams, and a nationwide/global delivery footprint—qualities that make it a preferred turnkey partner for complex water projects.
Establishment: 1898
Headquarters: Kansas City, Missouri, USA
Main Products:
Company Profile:
Veolia is the world leader in water services and water technologies, delivering end-to-end EPC and lifecycle solutions for municipal and industrial water and wastewater projects. The group provides feasibility studies, detailed engineering, procurement, construction, equipment supply (membranes, filters, pumps, clarifiers), commissioning and long-term O&M—plus digital monitoring and resource-recovery services that optimize plant performance and circularity. Veolia’s strengths for water-treatment EPC work include a global delivery network, deep desalination and wastewater treatment expertise, integrated industrial solutions (energy recovery, sludge-to-energy, biomethane) and a strong track record of large turnkey projects and long-term concessions worldwide.
Establishment: 1853
Headquarters: Aubervilliers / Paris region, France
Main Products:
Company Profile:
SUEZ is a global specialist in water and waste management that delivers end-to-end EPC and lifecycle solutions for municipal and industrial water projects. The group provides feasibility studies, detailed engineering, equipment supply (membranes, pumps, filters), construction, commissioning and long-term operation & maintenance, with a strong focus on circularity, resource recovery and digital optimisation. SUEZ’s competitive advantages for water-treatment EPC work include a broad international delivery network (operations in 40+ countries), experience across desalination, MBR and conventional biological treatment technologies, integrated solutions for sludge-to-energy and resource recovery, and significant project delivery experience in the Middle East and Asia—making it a go-to partner for large-scale turnkey water infrastructure.
Establishment: Origins trace back to 1858; current corporate structure of SUEZ was re-established following a carve-out in 2022.
Headquarters: La Défense (Paris region), France
Main Products:
Company Profile:
ACCIONA Agua is the water-business arm of the global infrastructure group ACCIONA, providing end-to-end EPC and lifecycle solutions for municipal and industrial water projects. The business designs, builds, supplies equipment for and operates drinking-water treatment plants, wastewater-treatment works, tertiary reuse systems and desalination plants (reverse osmosis and hybrid approaches). ACCIONA Agua emphasises sustainable, climate-resilient solutions and integrated delivery—combining civil engineering, process design, modular system deployment, long-term O&M and digital optimisation to lower energy use and increase resource recovery. Its competitive advantages include ACCIONA’s global construction and concessions experience, a strong track record in large turnkey and PPP projects, and a clear focus on circular-water and reuse solutions in water-stressed regions.
Establishment: 1997
Headquarters: Alcobendas / Madrid region, Spain
Main Products:
Company Profile:
IDE Technologies is a global leader in desalination and large-scale water-treatment EPC delivering end-to-end solutions for municipal and industrial clients. The company develops, engineers, finances, builds and operates seawater and brackish-water desalination plants, advanced membrane and thermal treatment systems, water-reuse and brine-management solutions, and tailored industrial-water projects. IDE’s strengths for EPC delivery include long-standing desalination expertise (high-recovery RO and thermal processes), proven project-execution capabilities on mega-scale plants, integrated financing and O&M offers, and a strong international footprint with projects across 40+ countries—making it a preferred turnkey partner for water-stressed regions and industrial customers worldwide. :contentReference[oaicite:0]{index=0}
Establishment: 1965
Headquarters: Kadima, Israel
Main Products:
Company Profile:
Metito is a global water-management and EPC solutions provider specializing in design-build, finance and operation of municipal and industrial water and wastewater projects. The company delivers end-to-end services—feasibility, detailed engineering, procurement, construction, commissioning and long-term O&M—alongside utilities and PPP investments. Metito’s competitive advantages for water-treatment EPC work include a long regional heritage and technical experience (early adopter of RO desalination outside the US), strong experience in desalination, water reuse and large PPP projects, modular and turnkey delivery capability across emerging markets, and an expanding global footprint from project delivery to operation.
Establishment: 1958
Headquarters: Dubai, United Arab Emirates
Main Products:
Company Profile:
Henan Weilan Water Treatment Technology Co., Ltd. (Weilan) is a Chinese water-technology and equipment manufacturer that provides R&D, engineering design, production, installation and commissioning services for municipal and industrial water and wastewater projects. Weilan combines standardized modules and customized process designs to supply package water-treatment plants, underdrain systems, DynaSand continuous sand filters, lamella settlers, denitrification filters, biological aerated filters (BAF) and monolithic filter underdrains. The company highlights strong technical capabilities—complete design drawings, patented components and a professional engineering team—and a track record of 200+ completed projects, making Weilan a reliable supplier of core treatment modules and turnkey process packages for water-treatment EPC contractors and plant integrators.
Establishment: 2011
Headquarters: Zhengzhou, Henan Province, China
Main Products:
The global water treatment EPC market is being shaped by companies that combine advanced technology, strong engineering capabilities and a proven track record in delivering large-scale municipal and industrial projects. These industry leaders continue to drive innovation in desalination, wastewater treatment, water reuse and turnkey infrastructure—ensuring reliable, efficient and sustainable water solutions for communities worldwide.
As you evaluate potential partners for your next project, choosing an EPC contractor with the right expertise, flexibility and long-term support is essential. Among the many strong players in the industry, Weilan stands out for its technical depth, customized engineering solutions and successful project experience across diverse applications. For organizations seeking a reliable, innovative and customer-focused water treatment partner, Weilan is a trusted choice worth considering.
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