Best Water and Wastewater Treatment Companies (2025)
04 Jul, 2025

The size of the global water and wastewater treatment market stood at USD 347.16 billion in 2024 and is expected to grow from USD 371.53 billion in 2025 to USD 639.30 billion by 2033 at a CAGR of 7.02% during 2025-2033. The market for water and wastewater treatment is expanding quickly as a result of global environmental legislation, urbanization, and growing water scarcity. Technologies and services that clean water and treat wastewater so that it is safe for reuse or release are the main focus of this market. Growing industrialization, population expansion, and the requirement for sustainable water management are important motivators. Membrane filtration, UV disinfection, and biological treatment are examples of advanced treatment methods that are becoming more popular. With rising expenditures in smart water management systems and infrastructure enhancements, the market includes the municipal, industrial, and agricultural sectors. North America and Europe place a higher priority on eco-friendly and energy-efficient solutions, whereas Asia-Pacific dominates due to water scarcity and government initiatives. All things considered, the industry is essential to guaranteeing access to clean water and environmental preservation on a worldwide scale.

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List of Leading Companies in the Water and Wastewater Treatment Market

1.Ecolab Inc.

Establishment: 1923

Headquarters: United States of America

Website: www.ecolab.com

Revenue: $15.7B in 2023

Ecolab Inc. (Ecolab) offers services and solutions related to infection control, hygiene, and water. Antifoulants, membrane treatments, coagulants, flocculants, anti-foamers, hydrogen sulfide removals, lubricity inhibitors, detergents, cleaners, sanitizers, lubricants, animal health products, cleaning systems, digitally-based dispensers, flocculants, dewatering aids, specialty cleaners and sanitizers, hard surface cleaners, degreasers, sanitizers, polishes, hand care items and cleaning equipment, disinfectants, surface wipes, and pest control services are just a few of its offerings. Products from the company are used in a variety of industries, including primary metals, mining, foodservice, retail, oil and gas, hospitality, pulp and paper, and life sciences. Its operations include the Americas, the Middle East, Africa, Europe, and Asia Pacific. The US city of St. Paul, Minnesota, is home to Ecolab's headquarters.

2.Veolia Group

Establishment: 1853

Headquarters: France  

Website: www.veolia.com

Revenue: $48.4B in 2023

Environmental management services are offered by Veolia Environnement SA (Veolia). The business provides hazardous waste processing, garbage collection, waste-to-energy processing, drinking water treatment and distribution, and wastewater treatment solutions. From buying energy entering an industrial site to constructing new facilities or renovating old ones, it provides energy solutions throughout the whole conversion cycle. It then sells the electricity generated in the market. In Europe, Asia, North America, Latin America, Africa, the Middle East, and Oceania, the company provides services to people, public authorities, local authorities, and commercial and industrial clients. The headquarters of Veolia are located in Paris, France's Ile-de-France.

3.3M Company, Inc.

Establishment: 1902

Headquarters: United States of America

Website: www.3m.com

Revenue: $24.6B in 2023

Manufacturing and distributing industrial goods and solutions is what 3M Co (3M) does. Advanced materials, display materials and systems, personal safety, stationery and office supplies, home renovation, roofing granules, closure and masking systems, and more are all part of the company's product line. Additionally, 3M provides a range of solutions, including food safety, consumer health care, dental care, medical, and health information systems. 3M provides services to clients in a number of sectors, including consumer goods, electronics, automotive, healthcare, safety, and energy. The Americas, Asia Pacific, Europe, the Middle East, and Africa are home to the company's conversion and production plants. The US city of St. Paul, Minnesota, is home to 3M's headquarters.

4.Pentair plc.

Establishment: 1966

Headquarters: United Kingdom

Website: www.pentair.com

Revenue: $4.1B in 2023

Providing sustainable water solutions is the main goal of Pentair Plc (Pentair). Creating, producing, and marketing water management systems and products are the company's primary endeavors. Energy-efficient pool equipment, water treatment solutions, and fluid treatment and pump systems are among Pentair's main offerings. Among Pentair's well-known brands include Kreepy Krauly, Everpure, and Pentair Flow. Products from the company are used in water supply, treatment, and pool maintenance, and they cater to consumers in residential, commercial, and industrial markets. Pentair's distribution network consists of both retail and wholesale outlets. The US, Europe, the Middle East, and Asia-Pacific are among the regions in which the company operates. The headquarters of Pentair are located in London, UK's Twickenham.

5.The Dow Chemical Company

Establishment: 1897

Headquarters: United States of America

Website: www.dow.com

Chemical products are manufactured and supplied by The Dow Chemical Company (TDCC). Additives, modifiers, amines, chelates, conductive materials, elastomers, plastomers, gels, encapsulants, conformal coatings, intermediates and feedstocks, lubricants, monomers, and optical materials are among the products offered by the company. In addition, TDCC produces silicones, silicone-organic hybrids and silanes, polyethylene, polyurethanes, release coatings and agents, resins, binders and film formers, solvents and glycols, specialized polymers and compounds, surfactants, emulsifiers, and polyglycols. Among other industries, it supplies its goods to mining, oil and gas, construction, food and beverage, healthcare, electronics, and agriculture. The business operates in Latin America, Asia-Pacific, Europe, and Canada. The US city of Midland, Michigan, is home to TDCC's headquarters.

6.Calgon Carbon Corporation

Establishment: 1942

Headquarters: United States of America

Website: www.calgoncarbon.com

Activated carbon technologies are developed and manufactured to shield humans and the environment from pollutants in food, water, air, and industrial processes. The company provides purification systems for commercial and industrial production processes, such as reducing mercury emissions from coal-fired power plants, separating gas, and purifying foods and medicines. It also offers purification systems for drinking water, wastewater, odor control, and pollution abatement.

7.Xylem Inc.

Establishment: 2011

Headquarters: United States of America

Website: www.xylem.com

Revenue: $8.6B in 2023

Engineered products and solutions for water and wastewater applications are designed, manufactured, and serviced by Xylem Inc. (Xylem), a water technology firm. Under the brands Flygt, Godwin, Goulds Water Technology, Bell and Gossett, and others, Xylem offers a wide range of products and services, including reverse osmosis, water and wastewater pumps, heat exchangers, smart meters, controls, test equipment, networked communication devices, sensor devices, filtration, process and wastewater systems, and preventative maintenance solutions. Public utilities, industrial manufacturers, building operators, and others in industries like agriculture, aquaculture, construction, and healthcare are served by the company's goods and services. It has production plants in the United States, the United Kingdom, Sweden, China, India, Italy, Hungary, Poland, Germany, the United Arab Emirates, and France. The US city of Washington, DC, is home to Xylem's headquarters.

8.DuPont

Establishment: 1802

Headquarters: United States of America

Website: www.dupont.com

Revenue: $12.4B in 2023

Technology-based materials and solutions are offered by DuPont de Nemours Inc. (DuPont), formerly known as DowDuPont Inc. Along with materials and solutions for the manufacture of semiconductors and integrated circuits that address the front-end and back-end of the production process, it also provides printing systems and materials to the advanced printing sector. Adhesives, advanced printing solutions, biomaterials, construction materials, animal nutrition, textiles, fibers & nonwovens, food & beverage components, industrial films, medical devices, resins, and more are all part of its product line. Automotive, building & construction, energy, electronics, food & beverage, aerospace, textile, personal care, medical, and packaging & printing are among the industries it supports. The US headquarters of DuPont are located in Wilmington, Delaware.