Clean water does not happen by accident. It takes good design, sound treatment methods, and years of field experience. Municipal water and wastewater companies build the systems that provide safe water to whole communities. They also supply key tools, such as membranes, and help run treatment plants each day.

This guide covers nine companies that support municipal water and wastewater treatment. Some are large global firms. Others focus on special tools, such as membrane filters. Each company offers different skills for water treatment projects in the United States and other parts of the world.

We selected these companies based on company records, official sources, and trusted industry data. If you manage a water utility or review vendors for a new project, this guide can help you compare your choices and make a clear decision.

Quick Comparison Table

Company	Specialization	Best For
Oxymo Technology	MBR & UF membrane manufacturing	Cities upgrading to compact, membrane-based treatment
Veolia Water Technologies	Full-cycle water and wastewater treatment	Large municipalities needing turnkey plant solutions
SUEZ	Water technology and digital solutions	Utilities modernizing aging infrastructure
ACCIONA Agua	Desalination and treatment plant construction	Coastal cities needing desalination capacity
Xylem	Pumps, disinfection, and smart monitoring	Utilities upgrading equipment and digital systems
Jacobs	Wastewater engineering and design	Cities planning large treatment plant expansions
Ecolab Inc. (Nalco Water)	Treatment chemicals and process control	Utilities needing chemical treatment programs
VA TECH WABAG	EPC water and wastewater plant construction	Municipal governments building new plants
Aquatech International	Zero liquid discharge and water reuse	Cities focused on water recycling goals

1. Oxymo Technology

Key Products & Services: MBR (Membrane Bioreactor) systems, hollow fiber UF membranes, MABR technology, PTFE membranes, package sewage treatment plants, and full design-to-installation support

Industries Served: Municipal sewage treatment, food and beverage, pharmaceutical, dairy, chemical, paper, and oilfield wastewater

Company Overview 

Oxymo Technology specializes in MBR and UF membrane systems for municipal and industrial water treatment. The company focuses on membrane technology, allowing it to build deep expertise in this area. This clear focus makes Oxymo a strong option for utilities seeking compact and high-efficiency treatment systems.

The company has completed hundreds of water treatment projects in more than 40 countries. Its engineers hold several invention patents related to PVDF, PAN, and PS/PES membrane formulas. Oxymo offers Membrane Bioreactor series, standard UF series, and Gravity UF series for different treatment needs. This product range gives municipalities more flexibility, from small package plants to larger systems serving growing populations.

Oxymo manufactures its membranes under ISO 9001 and ISO 14001 certified management systems. These standards help maintain consistent quality during production. The company also provides after-sales technical support, giving utilities guidance after the system starts operating. Its membrane expertise, certified manufacturing, and technical support make Oxymo a reliable choice for municipal water treatment projects.

What Makes Oxymo Technology Stand Out?

Oxymo Technology stands out through its focused approach to membrane-based water and wastewater treatment. Rather than offering a wide range of unrelated engineering services, the company concentrates on membrane technology and customized treatment solutions. Key strengths include:

• Specialized Membrane Technology: Oxymo focuses on membrane-based water and wastewater treatment technology.
• Compact MBR Systems: Its MBR technology combines biological treatment with membrane separation in a compact treatment process.
• Suitable for Limited-Space Projects: The compact system design can support municipalities where available land is limited.
• High Treated-Water Quality: Its membrane-based treatment approach can help meet strict treated-water quality requirements.
• Customized Treatment Systems: Oxymo offers system configurations based on specific project requirements.
• Factory-Direct Supply: Buyers can source suitable treatment systems directly from the manufacturer.
• Flexible Project Configurations: Its solutions can be adapted to different municipal wastewater treatment needs.

2. Veolia Water Technologies

Headquarters: Aubervilliers, France

Key Products: Drinking water and wastewater treatment plants, desalination systems, biogas and biosolid recovery, digital twin monitoring tools

Industries Served: Municipal utilities, food and beverage, oil and gas, power generation, mining

Company Overview 

Veolia Water Technologies is part of Veolia, founded in 1853. It is one of the world’s largest water treatment providers. The company serves cities and industries across many countries and regions. It designs and builds plants for drinking water and wastewater treatment.

Veolia also recovers biogas from sludge produced during wastewater treatment. This process turns waste into energy that can support plant operations. Its digital twin tools help utilities track sewer networks more closely. They can also help predict maintenance needs before major failures occur.

Veolia follows quality and environmental standards across its global operations. Its long history and broad service network support large municipal projects. The company can provide both plant design and long-term technical support.

3. SUEZ

Headquarters: Paris, France

Key Products: Degrémont treatment plants, digital asset management platforms, metering solutions, desalination technology

Industries Served: Municipal water utilities, industrial water reuse, waste recycling operations

Company Overview 

SUEZ has worked in the water and waste sectors since the late 1800s. It serves municipalities across Europe, North America, and other global markets. Its Water Technologies and Solutions division provides treatment systems and digital tools. These solutions help cities improve water and wastewater treatment.

The company designs and builds treatment plants through its Degrémont brand. SUEZ also offers software for managing water infrastructure. This software helps utilities plan repairs, upgrades, and future investments. Its metering tools give cities better data on water use and system performance.

SUEZ follows environmental and quality standards across its global operations. Its engineering and digital services support utilities with aging treatment systems. These tools can help improve daily work and long-term planning.

4. ACCIONA Agua

Headquarters: Alcobendas, Madrid, Spain

Key Products: Drinking water treatment plants, wastewater treatment systems, tertiary reuse systems, reverse-osmosis desalination plants

Industries Served: Municipal governments, coastal water authorities, industrial clients

Company Overview 

ACCIONA Agua is the water division of the Spanish infrastructure group ACCIONA. It has a strong presence in Spain, Italy, and Portugal. The company also works on projects in Australia, India, and the Middle East.

ACCIONA Agua designs, builds, and operates water treatment systems. Its services cover drinking water plants and wastewater treatment facilities. It also builds reverse-osmosis desalination plants for areas facing water shortages. In some cities, the company also manages billing for water users.

The company applies quality checks throughout each stage of a project. Its experience in desalination makes it a strong option for coastal cities. These cities can use desalination to develop new sources of fresh water.

5. Xylem

Headquarters: Washington, D.C., United States

Key Products: Flygt pumps, Wedeco UV disinfection systems, Sanitaire aeration equipment, smart water monitoring platforms

Industries Served: Municipal utilities, industrial water, commercial buildings, agriculture

Company Overview 

Xylem was formed in 2011 as a spinoff from ITT Corporation. It quickly became a well-known name in water technology. Today, the company serves customers in more than 150 countries. It makes pumps, disinfection systems, and monitoring equipment for wastewater plants. Its Flygt pumps are widely used in many municipal treatment facilities. Its Wedeco UV systems also support water and wastewater disinfection.

The company has also expanded its digital monitoring tools through acquisitions. These tools give utilities real-time data on system performance and operations. This can help teams identify issues and make faster decisions.

Xylem follows recognized manufacturing and quality standards across its global facilities. Its wide range of equipment suits utilities upgrading existing infrastructure. It can be a useful option when a full plant rebuild is unnecessary.

6. Jacobs

Headquarters: Dallas, Texas, United States

Key Products: Wastewater treatment plant design, sewer system engineering, nutrient removal systems, digital infrastructure planning tools

Industries Served: Municipal governments, federal agencies, industrial clients

Company Overview 

Jacobs is a leading engineering company for wastewater treatment projects in the United States. The company traces its roots back to 1947 and now works worldwide. Jacobs handles projects ranging from sewer upgrades to full treatment plant construction. Its engineers work on nutrient removal and other wastewater treatment challenges. These services help utilities meet changing environmental rules and treatment needs.

The company also develops digital tools for utility operations. These tools help teams track plant performance and plan maintenance work. Early planning can help utilities identify issues before they affect operations.

Jacobs follows environmental and engineering standards across its projects. Its scale and engineering experience support large municipal wastewater treatment programs. This makes Jacobs a strong option for complex infrastructure projects.

7. Ecolab Inc. (Nalco Water)

Headquarters: St. Paul, Minnesota, United States

Key Products: Water treatment chemicals, Nalco Water process programs, monitoring and control systems, PFAS treatment technology

Industries Served: Municipal utilities, food and beverage, healthcare, hospitality, industrial manufacturing

Company Overview 

Ecolab runs its water treatment business through the Nalco Water brand. The company serves customers in more than 170 countries with water, hygiene, and energy solutions.

Ecolab develops treatment chemicals and monitoring systems for water treatment programs. These solutions help municipalities manage water quality and improve system efficiency. The company also offers PFAS treatment technology for growing water quality concerns.

Ecolab has also invested in Aquatech International to expand its water reuse work. This move supports projects that need advanced treatment and reuse systems. The company maintains a large technical support network across its global operations. Its experience in water chemicals and monitoring can support long-term treatment programs.

8. VA TECH WABAG

Headquarters: Chennai, India

Key Products: Municipal wastewater treatment plants, desalination systems, water recycling and reuse technology, EPC and O&M services

Industries Served: Municipal governments across 25-plus countries, industrial water clients

Company Overview 

VA TECH WABAG traces its history back to 1924 and focuses only on water and wastewater treatment. This clear focus allows the company to build deep experience in water technology.

The company provides engineering, procurement, and construction services for complete treatment plants. It also offers design-build-operate and build-own-operate models for different project needs. These options give municipalities more flexibility when planning and managing treatment projects.

WABAG also provides desalination and water reuse solutions for regions facing water shortages. Its team supports projects from the early design stage through long-term plant operations. This life-cycle approach helps municipalities manage projects at different stages. WABAG can be a strong option for governments building new water and wastewater treatment infrastructure.

9. Aquatech International

Headquarters: Canonsburg, Pennsylvania, United States

Key Products: Zero liquid discharge systems, desalination technology, water reuse and recycling solutions

Industries Served: Municipal utilities, power generation, oil and gas, industrial manufacturing

Company Overview 

Aquatech International is a privately owned company that focuses on advanced water treatment. It has built a strong name for handling complex water reuse and recycling projects worldwide.

The company specializes in zero liquid discharge systems that reduce wastewater output. Its desalination solutions also support projects in areas facing water shortages. Aquatech has worked on major projects that help reduce the need for freshwater sources. Ecolab holds a minority stake in Aquatech, which supports its growth in water treatment. This link also strengthens Aquatech’s position in the wider water treatment market.

Aquatech has a strong record of delivering complex water treatment projects. Its focus on water reuse makes it a useful partner for utilities. It can support cities that want to reduce waste and use water more efficiently.

Final Thoughts

Municipal water systems face pressure from aging pipes, stricter rules, and new threats like PFAS. Cities also need to prepare for growth, water shortages, and rising treatment needs. These challenges make the right treatment partner more important than ever.

The companies on this list offer different strengths. Veolia and SUEZ provide broad water treatment expertise. Xylem and Ecolab focus on equipment, monitoring, and treatment programs. Jacobs and VA TECH WABAG support large infrastructure projects, while Aquatech specializes in water reuse.

Oxymo Technology is a strong choice for cities seeking compact, membrane-based systems. Its MBR and UF expertise, certified manufacturing, and technical support help meet different treatment needs. Contact Oxymo Technology today to discuss your next project.

Email: oxymo@oxymembrane.com

Contact No.: +86-1300-635-3124

FAQs

Why choose Oxymo Technology for a municipal wastewater treatment project?

Oxymo specializes in MBR and membrane technology for compact wastewater treatment systems. Its customized solutions can help projects with limited space and strict effluent quality targets.

When is an MBR system better than a conventional wastewater treatment system?

An MBR system can work well when land is limited or high effluent quality is needed. It can also support water reuse and upgrades at existing wastewater treatment plants.

What factors increase municipal wastewater treatment plant operating costs?

Energy use, membrane cleaning, chemical use, sludge handling, and labor can increase plant costs. Plant design and technology choices also affect long-term operating expenses.

How can municipalities select the right wastewater treatment technology?

Municipalities should review influent quality, discharge limits, available space, plant capacity, and lifecycle costs. They should also choose suppliers with relevant project experience and reliable technical support.