Clean water is no longer a background utility — it is a competitive advantage for the industries that depend on it. With the ongoing and increasingly stringent regulatory oversight of PFAS, nutrient discharge, and industrial wastewater, procurement teams, contractors, and plant managers are challenged to find systems that comply with regulations, maintain reliability, and remain cost-effective. The pressure has compelled U.S. water treatment companies to compete more than ever for innovation and reliability.

Demand continues to be strong. Municipal utilities are seeking to upgrade aging facilities, F&B facilities face more demanding process water management requirements, and semiconductor manufacturers are using significantly more water than was forecasted 10 years ago. Buyers are looking for U.S. water treatment manufacturers to trust for long-term performance, not just one-time installation, whether it’s municipal sewage, industrial wastewater or ultrapure water for manufacturing.

This is a list of 12 U.S. water treatment companies to watch in 2026, including companies that have been identified for their innovation, technology, product quality, industry experience and market presence. You’ll get an overview of their capabilities, the industries that they treat, and the solutions that they provide for municipal, industrial, and specialty water treatment applications. It also explains the essential elements to look for in a water treatment company to make an informed supplier decision for your next project.

1. OXYMO Technology

Website URL: https://oxymotec.com

Email: oxymo@oxymembrane.com

Contact No.: +86 130 0635 3124

Company Overview

OXYMO Technology has established its reputation as one of the most technologically advanced MBR membrane manufacturers in today’s U.S. market. The company has focused on the design and fabrication of UF and MBR technology for more than 15 years, closely cooperating with universities and research institutions to produce patented membranes for various applications, including MABR, flat-sheet MBR, UF, and membrane distillation. The research investment has resulted in full manufacturing capacity. OXYMO now manufactures the complete range of membranes at scale, with ISO 9001 and ISO 14001 quality and environmental management standards.

The engineering has been supported with global project experience. OXYMO has been installed in more than 40 countries, with some of the most difficult and complex industrial wastewater being treated, such as sewage from food processing, printing and dyeing, papermaking, meat processing, oilfield, pharmaceutical, dairy, and chemical manufacturing. This is a practical experience that is hard for many new membrane suppliers coming to the U.S. market to boast.

Key Products and Services

OXYMO’s product range covers the full spectrum of membrane bioreactor needs for sewage treatment applications:

• Hollow-fiber MBR membranes, reinforced by embedded PVDF, alloy-PVC, PAN, and PS/PES materials, enable plants to tailor filtration precision to their treatment needs while maintaining consistent performance despite fluctuations in influent load — a common challenge in municipal wastewater treatment plants.
• The MABR (Membrane Aerated Biofilm Reactor) system provides biological treatment with reduced energy consumption compared to conventional aerated systems.
• Ultrafiltration (UF) membrane systems, such as the gravity UF series, deliver energy-efficient filtration performance.
• Membrane distillation technology supports advanced separation and water recovery applications.
• OXYMO also delivers complete package sewage treatment plants, covering end-to-end design, manufacturing, installation, and commissioning.

Industries Served

OXYMO membrane systems are used across a range of industrial wastewater sectors, including municipal wastewater treatment, food and beverage processing, meat and poultry processing, printing and dyeing, pulp and paper, oilfield-produced water, pharmaceutical manufacturing, dairy processing, and general chemical industry wastewater.

What Makes OXYMO Technology Stand Out?

Proprietary Membrane Technology

OXYMO’s membrane technology is proprietary, developed through university research and patent programs — giving it deeper technical expertise than companies that rely on licensed or repackaged membrane technology.

Technical Expertise During the Entire Process

OXYMO’s professional services — including system design, membrane selection, and commissioning — help engineers and construction companies reduce risk and ensure successful installation.

Competitive Price

OXYMO’s efficient manufacturing process keeps membrane pricing competitive, allowing the company to rival Western producers without sacrificing quality.

Quality Membrane Manufacturing

Membrane manufacturing takes place in ISO-certified facilities, ensuring consistent quality across both pilot and commercial production.

End-to-End Service Offering

OXYMO provides design, manufacturing, sales, and service all under one roof.

2. Hach Company

Headquarters: Loveland, Colorado, USA

Key Products: Water quality analyzers, testing instruments, online monitoring systems, laboratory equipment, digital water management solutions

Industries Served: Municipal water and wastewater, industrial manufacturing, power generation, food and beverage, environmental laboratories

Hach Company is among the most recognized U.S.-based firms offering high-quality water analysis and monitoring tools and services for both municipal and industrial water treatment plants. Established way back in 1947, this firm has earned a reputation of being a supplier of reliable instruments that can be used for maintaining water quality standards and improving operations. Currently, Hach Company provides support to its global clientele through the use of advanced water monitoring systems.

Among the most recognized products of this firm are advanced water monitoring tools that provide accurate information related to the treatment process. It has an array of monitoring products such as laboratory instruments, online analyzers, sensors, and digital monitoring platforms.

3. 3M Purification Inc.

Headquarters: Maplewood, Minnesota, USA

Key Products: Filter cartridges, activated carbon filters, membrane filtration systems, industrial water filtration solutions

Industries Served: Food and beverage, pharmaceuticals, electronics, industrial manufacturing, municipal water treatment

3M Purification Inc. is a well-known provider of water filtration and separation systems for industrial, commercial, and municipal use. As part of 3M’s international filtration business, 3M Purification Inc. brings decades of experience developing filtration products that improve water quality and support manufacturing processes. Its solutions are widely used across industries that demand high filtration performance.

A key advantage is 3M’s ability to integrate filtration media into innovative designs that boost efficiency and reduce maintenance needs.

4. DuPont Water Solutions

Headquarters: Wilmington, Delaware

Key Products: FILMTEC reverse osmosis and nanofiltration elements, AMBERLITE ion exchange resins

Industries Served: Municipal desalination, industrial water and energy, life sciences, residential and commercial

DuPont Water Solutions is one of the premier U.S.-based companies in the water treatment technology business. It is known for developing FILMTEC reverse osmosis and nanofiltration membranes for desalination, along with AMBERLITE ion exchange resins. Originally established in 1977 in Minnesota as FilmTec Corporation, the business became part of DuPont in 2019 following the separation of DowDuPont.

DuPont is famous for its membrane technology. The company’s FILMTEC line is an industry standard for reverse osmosis water systems and has been in use for decades in municipal desalination, industrial process water, and life science applications.

5. Kurita America

Headquarters: Saint Michael, Minnesota

Key Products: Boiler and cooling water treatment chemicals, wastewater treatment chemicals, monitoring systems

Industries Served: Industrial manufacturing, power generation, food and beverage, chemical processing

Kurita America is a recognized industrial water treatment company that provides boiler and cooling water treatment chemicals, wastewater treatment chemicals, and monitoring systems for U.S. manufacturers. Since entering the U.S. market in 1996, Kurita America has expanded through acquisitions such as U.S. Water Services and Fremont Industries. It is the U.S. subsidiary of Kurita Water Industries, a Japanese company founded in 1949.

Rather than simply selling chemicals, Kurita blends chemistry, equipment, and engineering expertise. Its eLink monitoring platform gives plant engineers real-time visibility into system performance, reflecting a data-driven approach to water treatment.

6. Aquatech International

Headquarters: Canonsburg, Pennsylvania

Key Products: Desalination systems, zero liquid discharge, high-efficiency reverse osmosis (HERO)

Industries Served: Power generation, oil and gas, mining, chemical processing, microelectronics

Aquatech International, based in the USA, is a water treatment specialist offering desalination systems, zero liquid discharge (ZLD) technology, and its proprietary High Efficiency Reverse Osmosis (HERO) process. Headquartered in Canonsburg, PA, the company has been solving complex water purification problems since 1981.

Aquatech specializes in complex, high-tech water treatment projects for niche markets. The company has expanded into lithium and critical minerals recovery, alongside its work in power generation, produced water, oil and gas, mining, and microelectronics — serving clients in more than 60 countries.

7. Gradiant

Headquarters: Boston / Woburn, Massachusetts

Founded: 2013 (MIT spinout)

Key Products: Carrier gas extraction desalination, selective contaminant extraction, and PFAS destruction technology

Industries Served: Semiconductors, pharmaceuticals, food and beverage, data centers, critical minerals

Gradiant is one of the newer water treatment companies in the USA, gaining traction with its Carrier Gas Extraction desalination, Selective Contaminant Extraction, and ForeverGone PFAS destruction technologies. Founded in 2013 by MIT researchers Anurag Bajpayee and Prakash Govindan, the company is now headquartered in the Boston area.

Gradiant treats water challenges as engineering problems rather than one-size-fits-all technology solutions. It provides semiconductor, pharmaceutical, and data center customers with advanced water reuse solutions powered by AI-based optimization on its SmartOps platform.

8. Pentair

Headquarters: Golden Valley, Minnesota

Key Products: Filtration systems, pumps, water softening, water conditioning valves

Industries Served: Residential, commercial, industrial, municipal, agriculture

Pentair is a famous American manufacturer that supplies water treatment valves, pumps, water softeners, and filtration systems for domestic and industrial customers. The firm was established in 1966 in Minnesota, USA, and became an independent water treatment company in 2018 after spinning off its electrical products division.

The company has achieved good market recognition due to its well-known product lines, such as the Fleck valves range and Pentek filtration range.

9. Ovivo

Headquarters: Montreal, Quebec, Canada (with U.S. manufacturing in Hutto, Texas)

Founded: Roots to 1975; rebranded as Ovivo in the mid-2010s

Key Products: Clarifiers, membrane bioreactors, biosolids and biogas handling equipment, Cembrane membranes

Industries Served: Municipal water and wastewater, mining, power, general industrial

Ovivo is a long-standing, globally recognized water treatment manufacturer, offering clarifiers, membrane bioreactors, and biosolids and biogas handling equipment. Since the mid-2010s, the company has been known as Ovivo, formed by the merger of several historic U.S. and Canadian brands, including EIMCO, Dorr-Oliver, Brackett Green, and Enviroquip. Headquartered in Montreal, the company has a strong manufacturing footprint in the United States, including a silicon carbide membrane plant in Hutto, Texas.

The company draws on more than 100 years of combined engineering experience, offering equipment suited to large-scale municipal projects as well as industrial applications requiring clarification and aeration systems.

10. Calgon Carbon Corporation

Headquarters: Moon Township, Pennsylvania, USA

Key Products: Activated carbon, UV disinfection systems, ion exchange resins, ballast water treatment systems

Industries Served: Municipal drinking water, industrial manufacturing, food and beverage, environmental remediation

Calgon Carbon Corporation is one of the key American companies that specializes in the sphere of water purification and environmental treatment technologies. Established in 1942, the company brings decades of experience in activated carbon, ultraviolet disinfection, and ion exchange treatment for municipalities and industries.

The company is mainly known for its competence in the field of activated carbon filtration and contaminant removal, such as PFAS treatment and drinking water purification. With a diverse product range and strong technical support, the company helps customers achieve high treatment efficiency while keeping pace with increasingly stringent environmental regulations.

11. WesTech Engineering

Headquarters: Salt Lake City, Utah

Founded: 1973

Key Products: Clarifiers, dissolved air flotation systems, granular media filters, headworks screening equipment

Industries Served: Municipal utilities, mining, chemical and petrochemical, general industrial

WesTech Engineering has manufactured and supplied water treatment equipment — including clarifiers, DAF systems, granular media filters, and headworks screening equipment — since 1973. The company began in Salt Lake City, Utah, as a group of engineers responding to the Clean Water Act and is now backed by Swire Water.

The company is known for its proficiency in liquid-solid separation technology and its longstanding relationships with consulting engineering firms. As a result, WesTech is well established among municipal utilities and industries such as mining, chemicals, and petrochemicals.

12. Kovalus Separation Solutions

Headquarters: Wilmington, Massachusetts, USA

Key Products: Ultrafiltration membranes, membrane bioreactors (MBR), reverse osmosis systems, PURON membrane technology

Industries Served: Municipal utilities, industrial wastewater, food and beverage, pharmaceuticals, microelectronics

Kovalus Separation Solutions is a renowned American water treatment firm. This can be attributed to the fact that the company has excelled in the use of advanced membrane filtration and separation systems. It was formerly referred to as Koch Membrane Systems before it was taken over by Sun Capital Partners in 2024 and rebranded to Kovalus Separation Solutions.

The company has further distinguished itself through its PURON membrane technology, which is renowned for high filtration efficiency and easy maintenance. Other products include ultrafiltration, membrane bioreactor, and reverse osmosis.

How to Choose the Right Water Treatment Company for Your Project

Choosing the right company for water treatment in the USA needs to involve the technical strengths of the company and the practical demands of the project. There are certain characteristics that are always typical of a good partner and not of a bad one.

1. Manufacturing experience – It’s important to choose a manufacturer with a wide range of experience in manufacturing projects to prevent any surprises when the project is commissioned.
2. Certifications – ISO 9001 Certification is a sign of quality management, while ISO 14001 Certification is a sign of production that is environmentally friendly.
3. Product quality – Request product technical specifications and independent product tests.
4. Customizability – Ensure the manufacturer is able to create a customised system to your flow rates and space requirements.
5. Production capacity – special equipment is a key consideration with regard to lead time.
6. MOQ / Lead time – For small distributors / contractors, ensure that minimum order quantities and lead time match your project budget and timeline.
7. Exporting machinery experience – Ask for documentation support, customs clearance and past experience with export projects to the U.S.
8. Technical support – quality of engineering support after sale, the less likely the system is to be down for changes or maintenance.
9. How much is it to replace the membrane and chemicals?
10. Guarantee and after-sales service – Good warranties and after-sales service can ensure your machinery can be used for a long life after installation.
11. Communication – Select a partner who is responsive and is able to communicate clearly during the design and specification process, not just in the sales pitch.

Conclusion

The water treatment industry in the U.S. continues to develop and evolve as municipalities and industries seek the most efficient, sustainable, and compliant solutions. Whether for advanced membrane filtration and desalination or for water quality monitoring and wastewater reuse, today’s top manufacturers offer solutions that can help enhance operational efficiency in the long term while meeting environmental goals.

When selecting a water treatment firm, you want to take into account a lot more than the product and the cost. There are several factors a buyer should consider when assessing each manufacturer’s technical skills, product quality, certifications, customization options, capacity, and after-sales support. A reliable partner can offer reliability, cost savings and lasting benefits throughout the lifespan of a water treatment system.

When selecting a trusted membrane technology partner, OXYMO Technology is a good choice. OXYMO provides dependable water treatment solutions to urban and industrial applications, has developed patented membrane solutions, and has a number of successful projects in more than 40 countries with ISO certification.

FAQ

Why is OXYMO Technology one of the best U.S. water treatment companies?

OXYMO Technology stands out with its patented MBR and UF membrane technology and ISO 9001/14001-certified production process. With its experience in more than 40 countries and comprehensive service approach, OXYMO is the right partner to choose for municipal and industrial buyers.

What types of wastewater treatment companies operate in the USA and serve industrial clients?

There are different kinds of wastewater treatment firms in the U.S., from chemical-based treatment firms such as Kurita America to cutting-edge membrane and desalination treatment firms such as OXYMO Technology, Gradiant, and Aquatech.

How do I choose the right industrial water treatment company for my project?

Make your decision based not only on the price but also on the number of certifications, production capacity, customization abilities, and after-sales support of the manufacturer. Require references and complete technical documentation before concluding any deal.