The Global Ultrapure Water Membrane Stack Market was valued at USD 121 Million in 2025 and is projected to reach USD 181 Million by 2034, growing at a Compound Annual Growth Rate (CAGR) of 6.0% during the forecast period. This robust growth is primarily fueled by the relentless expansion of the semiconductor and microelectronics industry, stringent regulatory standards in pharmaceuticals, and the accelerating adoption of chemical-free water purification technologies across critical industrial applications.

As industries worldwide demand water with near-absolute purity for manufacturing processes, the focus intensifies on the core technology enabling it: the membrane stack. This advanced unit combines electrodialysis and ion exchange to produce water with resistivity up to 18.2 MΩ·cm. In this blog, we profile the Top 10 Companies in the Ultrapure Water Membrane Stack Industry—a strategic mix of global water technology giants, specialized manufacturers, and innovative suppliers shaping the future of industrial water purification.

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🔟 1. Xylem Inc.

Headquarters: Washington, D.C., USA
Key Offering: EDI Membrane Stacks, Integrated UPW Systems, Analytical Instruments

Xylem is a global leader in water technology, providing advanced solutions for water and wastewater applications. Its portfolio includes high-performance membrane stacks that are integral to ultrapure water systems used in semiconductor fabrication, pharmaceutical production, and power generation. The company’s expertise in electro-deionization (EDI) technology makes it a preferred partner for industries requiring the highest water purity standards.

Innovation Focus:

• Development of low-energy, high-recovery EDI membrane stacks

• Integration of IoT for real-time system monitoring and predictive maintenance

• Strategic acquisitions to enhance its advanced treatment capabilities

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9️⃣ 2. Siemens AG

Headquarters: Munich, Germany
Key Offering: SIROX® EDI Systems, UF/RO Membrane Stacks, Automation Solutions

Siemens leverages its extensive expertise in automation and digitalization to offer sophisticated ultrapure water solutions. Its membrane stack technology is renowned for reliability and efficiency, serving critical applications where water quality is non-negotiable. Siemens provides complete systems that ensure consistent production of high-purity water with minimal chemical usage.

Innovation Focus:

• Digital twin technology for UPW system optimization

• Focus on sustainable operations with reduced water and energy consumption

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8️⃣ 3. Veolia Environnement S.A.

Headquarters: Paris, France
Key Offering: HPD® EDI, Membrane Filtration Stacks, Full-Scope Water Treatment Services

Veolia is a world-leading environmental services company with a strong focus on water technologies. Its membrane stack offerings are central to its ultrapure water systems, which are deployed in some of the world’s most demanding industrial sites. Veolia excels at providing customized solutions that address specific client challenges in purity, cost, and sustainability.

Innovation Focus:

• Advanced membrane materials for enhanced fouling resistance

• Circular economy models for water reuse and waste minimization

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7️⃣ 4. MEGA a.s.

Headquarters: Prague, Czech Republic
Key Offering: CIP Series EDI Stacks, Custom Membrane Stack Designs

MEGA a.s. is a specialized manufacturer known for its high-quality electrodeionization stacks. The company focuses exclusively on ion exchange and EDI technologies, allowing it to deliver products with superior performance and longevity. Its membrane stacks are critical components in systems producing ultrapure water for the power, microelectronics, and pharmaceutical industries.

Innovation Focus:

• Proprietary stack designs for improved flow dynamics and salt removal

• R&D in robust ion exchange membranes for challenging feed waters

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6️⃣ 5. QUA Group

Headquarters: Enfield, Connecticut, USA
Key Offering: EDI Membrane Stacks, FEDI™ Systems

QUA Group is an innovation-driven company specializing in membrane-based water and wastewater treatment solutions. Its EDI membrane stacks are designed for high efficiency and reliability in producing ultrapure water. QUA’s technology is particularly valued for its compact design and ability to operate effectively under variable conditions.

Innovation Focus:

• FEDI™ technology combining filtration and electrodeionization

• Focus on reducing the total cost of ownership for UPW systems

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5️⃣ 6. MANN+HUMMEL

Headquarters: Ludwigsburg, Germany
Key Offering: Ultrafiltration (UF) Membrane Stacks, Membrane Bioreactors (MBR)

MANN+HUMMEL is a leading filtration specialist whose product range includes advanced membrane stacks for ultrafiltration applications. These stacks are often used as a critical pre-treatment step in ultrapure water systems to remove particulates, colloids, and microorganisms, protecting downstream reverse osmosis and EDI components.

Innovation Focus:

• Development of high-strength, hydrophilic membrane materials

• Modules designed for easy maintenance and long service life

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4️⃣ 7. Wuhan Aquacellsmem New Film Material Co., Ltd.

Headquarters: Wuhan, China
Key Offering: RO/NF/UF Membrane Stacks, Custom Membrane Elements

Wuhan Aquacellsmem is a key player in the Asian market, specializing in the research, development, and production of various membrane stacks. The company benefits from proximity to the massive semiconductor and electronics manufacturing base in China, supplying cost-effective and reliable membrane solutions for regional and global customers.

Innovation Focus:

• Localized production to serve the booming Asia-Pacific market

• Cost-optimized membrane stacks without compromising on performance

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3️⃣ 8. Pentair plc

Headquarters: London, United Kingdom
Key Offering: X-Flow UF Membrane Stacks, Residential and Industrial RO Systems

Pentair is a global water treatment company offering a diverse range of products, including specialized membrane stacks. Its technologies are applied in various stages of water purification, contributing to the production of ultrapure water for industrial processes. Pentair’s strength lies in its application engineering and system integration capabilities.

Innovation Focus:

• Energy-efficient membrane technologies

• Smart water solutions with advanced monitoring features

Download FREE Sample Report:
Ultrapure Water Membrane Stacke Market – View in Detailed Research Report

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2️⃣ 9. DuPont Water Solutions

Headquarters: Wilmington, Delaware, USA
Key Offering: FilmTec™ RO/NF Elements, Integrated Membrane Stacks

DuPont is a material science giant with a renowned water solutions division. Its FilmTec™ reverse osmosis and nanofiltration elements are industry standards for desalination and purification. These high-performance membranes are foundational components in stacks used to produce ultrapure water, known for their high rejection rates and durability.

Innovation Focus:

• Advanced polymer science for fouling-resistant membranes

• Sustainability initiatives to reduce the environmental impact of water treatment

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1️⃣ 10. Pall Corporation (a Danaher company)

Headquarters: Port Washington, New York, USA
Key Offering: Ultrapure Water Membrane Stacks, Final Filtration Assemblies

Pall Corporation, part of Danaher’s Life Sciences platform, is a global leader in filtration, separation, and purification. Its membrane stacks are critical for the final polishing stages in ultrapure water systems, ensuring the removal of trace contaminants to meet the stringent standards of the pharmaceutical and biotechnology industries.

Innovation Focus:

• High-flow, low-pressure-drop membrane stack designs

• Validation support for regulated industries like pharmaceuticals

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Ultrapure Water Membrane Stacke Market – View in Detailed Research Report

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🌍 Outlook: The Future of Ultrapure Water is Smarter and More Sustainable

The ultrapure water membrane stack market is undergoing a significant transformation. While established technologies like EDI and RO continue to dominate, the industry is investing heavily in digitalization, material science, and sustainable operations to meet evolving industrial demands.

📈 Key Trends Shaping the Market:

• Rapid capacity expansion in Asia-Pacific to support new semiconductor fabs

• Regulatory push for higher water reuse and lower waste generation

• Digitalization of membrane stack operations with IoT and AI for predictive maintenance

• Strategic partnerships between membrane suppliers and system integrators for turnkey solutions

Read Full Report:
Ultrapure Water Membrane Stacke Market – View in Detailed Research Report

The companies listed above are not only supplying critical components for water purification—they’re enabling the technological advancement of entire industries that depend on the purest water.