Home / Water Data / Guides

60 Water Technology Companies

This list names 60 water technology companies: makers of membranes, filters and treatment systems, smart meters and software, desalination and reuse equipment, pumps and pipes, testing instruments, and startups working on problems such as PFAS and leaks. Each line says what the company does in water and gives one figure about its size or work.

The companies are grouped by what they do and are not ranked. The figures differ in kind (revenue, employees, customers, installations, funding) and in year, so they are not like for like. Utilities that run water services are on the water companies list.

Updated October 5, 2026 · Water Data Prize Newsroom

Treatment, membranes and reuse

1 Xylem Xylem provides water transport, treatment, filtration, disinfection and digital systems, with more than 23,000 colleagues serving customers in more than 150 countries and revenues of $8.6B.
2 Ecolab Ecolab provides water treatment chemicals, programs, monitoring and optimization services, and in 2025 it managed more than 1 trillion gallons of water for customers worldwide.
3 DuPont DuPont Water Solutions makes reverse osmosis, ultrafiltration and ion-exchange technologies that help process 36 million gallons of clean water a minute across the globe.
4 Pentair Pentair provides residential, commercial and industrial water filtration, pumps and management systems, and had approximately 9,750 employees worldwide as of December 31, 2024.
5 Trojan Technologies Trojan Technologies supplies ultraviolet disinfection and advanced water treatment systems, and in July 2017 it completed its 10,000th municipal UV system installation, its first having been in 1983.
6 Calgon Carbon Calgon Carbon provides activated carbon, equipment and services for water purification, with purification solutions for more than 700 distinct applications, including drinking water and wastewater.
7 Aquatech International Aquatech provides desalination, wastewater reuse and zero-liquid-discharge treatment systems, with 2,000+ installations worldwide and 1.6B+ gallons of water treated daily.
8 BWT BWT develops water treatment products and processes for private customers, industry, hotels and the public sector, with more than 6,500 employees and partners in more than 120 countries.
9 Toray Industries Toray Industries develops reverse osmosis, nanofiltration and ultrafiltration membranes, and its water treatment membranes contribute 27.23 million tons a day of water filtration throughput.
10 Metito Metito designs and builds desalination, water treatment, wastewater reuse and utility infrastructure, with 16 offices worldwide, more than 2,500 employees and over 3,000 plants built.
11 NX Filtration NX Filtration develops hollow-fiber membranes for municipal and industrial water treatment, and its 2025 membrane sales could enable the production of 649 billion liters of clean water.
12 VA Tech Wabag VA Tech Wabag designs and operates municipal and industrial water, wastewater and desalination plants, and has executed 1,500+ plants since 1995 with a presence in 25+ countries.
13 Cambi Cambi treats wastewater solids with thermal hydrolysis and anaerobic digestion, and by the end of 2024 its systems had been ordered for 90 plants across 27 countries.
14 Anaergia Anaergia converts organic waste and wastewater into renewable fuel, clean water and fertilizer, and has more than 230 reference facilities across 17 countries on four continents.
15 WTE Wassertechnik WTE Wassertechnik plans, builds and operates wastewater treatment plants, and the WTE Group has successfully completed over 125 projects for wastewater and sewage sludge treatment.
16 WFI Group WFI Group provides wastewater treatment, industrial water treatment and water reuse solutions, with a wastewater reuse capacity of 82,956,000,000 liters a year.
17 Culligan Culligan provides household, office and commercial water filtration, softening and treatment solutions, serving 170+ million users globally per year and filtering 35+ billion liters of water annually.
18 WaterTectonics WaterTectonics designs and installs industrial, municipal and process water treatment systems, with 1,200+ completed projects in 15 countries and 27 states.

Desalination and zero liquid discharge

19 Energy Recovery Energy Recovery makes pressure-exchanger devices that save energy in desalination and water reuse, and seawater desalination plants using its products produce over 35 million cubic meters of water per day.
20 Saltworks Technologies Saltworks Technologies treats industrial wastewater with brine concentration, reverse osmosis, evaporation and zero-liquid-discharge systems, and today it employs over 160 highly skilled professionals.
21 Gradiant Gradiant provides industrial water treatment, desalination, reuse and zero-liquid-discharge solutions, and has built more than 2,500 end-to-end systems for customers around the world.
22 Elemental Water Makers Elemental Water Makers makes fresh water from seawater with solar-powered desalination systems that produce up to 100 cubic meters of clean water daily, for off-grid or hybrid use.
23 Desolenator Desolenator uses solar thermal energy to produce ultrapure water from saline or contaminated water, and has scaled up to produce more than 40 cubic meters of water per hour.

Smart water, data and leak detection

24 Landis+Gyr Landis+Gyr provides advanced metering and utility data platforms, and has served 3,500+ utilities since 1896, with 180+ million connected intelligent devices.
25 Mueller Water Products Mueller Water Products provides valves, hydrants, metering, leak detection and pipe-condition monitoring, and has identified an estimated 7.7 billion gallons in water loss savings through EchoShore leak detection since 2020.
26 Kamstrup Kamstrup develops smart water and energy meters and digital utility solutions, with 1,575 employees, 2 production sites and sales offices in more than 25 countries in 2022.
27 Badger Meter Badger Meter provides smart water meters, sensors, communications and analytics for water utilities, and its sales into the utility water market were $816.1 million in 2025.
28 Itron Itron provides smart water meters, communications and analytics to manage water use, and water utilities managing more than 30 million endpoints use its Temetra solution.
29 Diehl Metering Diehl Metering provides smart water meters, IoT connectivity, analytics and services for utilities, with 1,900 employees, 7 production sites and 160 years of metering experience.
30 METAWATER METAWATER designs, builds, operates and maintains water and sewage treatment facilities in Japan and overseas, and had 3,883 consolidated employees as of March 31, 2025.
31 VTScada VTScada provides SCADA software for monitoring and controlling water and wastewater utilities, and 50 million North Americans rely on it through 1,600 municipal utilities.
32 Bentley Systems Bentley Systems provides hydraulic modeling and digital twin software for water and sewer networks, and provides its software to nearly 42,000 accounts in 189 countries.
33 DHI DHI provides water modelling software and services for managing water environments, and in 2023 it was involved in 2,700 projects across 115 countries.
34 Minsait Minsait provides water utilities with analytics, hydraulic management and real-time leak monitoring solutions, and more than 50 million people have access to water thanks to its technology.
35 AVEVA AVEVA provides industrial software for managing and optimizing water and wastewater operations, and counts more than 1,400 water and wastewater customers.
36 Autodesk Autodesk provides software and analytics for planning, designing and operating water infrastructure, and its Innovyze water software is trusted by approximately 3,000 customers worldwide.
37 Echologics Echologics provides acoustic leak detection and condition assessment for water mains, and has assessed more than 100 miles of one utility's water pipeline since 2013.
38 Electro Scan Electro Scan inspects pressurized potable water pipes to detect, locate and measure leaks, with over 4,000 successful potable water deployments worldwide.

Pumps, pipes and infrastructure

39 Grundfos Grundfos makes pumps and pumping systems for water supply and wastewater utilities, and in 2025 its solutions enabled end users to save an estimated 1.6bn cubic meters of water.
40 KSB SE & Co. KGaA KSB provides pumps, valves and related systems for water and wastewater applications, with sales revenue of 3,035 million euros and 16,838 employees at 31 December 2025.
41 Wilo SE Wilo develops pumps and systems for water supply, water management and wastewater applications, and employed an annual average of 8,910 people in 2025.
42 Ebara Corporation Ebara provides pumps and water infrastructure systems for supply, sewage, drainage and treatment, and its pumps are installed at more than 1,000 drainage pumping stations in Japan.
43 Flowserve Corporation Flowserve makes pumps and flow-control systems for water and wastewater infrastructure, and its collective energy comes from 16,000 associates across 50 countries.
44 Sulzer Ltd. Sulzer supplies pumps and equipment for water production, transport, wastewater collection and treatment, and in 2024 helped purify an estimated 66 million cubic meters of water per day.
45 Aliaxis Aliaxis makes plastic pipe systems that transport, store and treat water, and around 75% of its products are designed to distribute, treat or store water.
46 Franklin Electric Co., Inc. Franklin Electric makes pumps, motors, drives and controls for municipal and other water systems and manufactures approximately 20,000 of them every day.

Testing and monitoring

47 IDEXX Laboratories, Inc. IDEXX provides microbiology tests for drinking water, wastewater, building and recreational water, and its tests help evaluate water supplies for more than 2.5 billion people in over 100 countries.
48 Process Instruments (UK) Ltd. Process Instruments supplies online analyzers and controllers for drinking, waste and industrial water, and has customers in more than 50 countries and on 6 continents.
49 Water-i.d. GmbH Water-i.d. develops photometers, reagents and software for water analysis, and by January 2020 more than 35,000 PoolLab units had been sold in less than three years.

Startups and scale-ups

50 ZwitterCo ZwitterCo uses selective membranes to treat and reuse difficult industrial wastewater, and its products have been ordered or installed at more than 50 industrial facilities over two years.
51 Greyter Water Systems Greyter Water Systems recycles graywater, rainwater and stormwater for reuse in buildings, with 100+ systems installed across North America.
52 Hydraloop Hydraloop recycles greywater for reuse in toilets, washing machines, gardens and pools, and installs its systems through 130 partners in 35 countries.
53 Aclarity Aclarity electrochemically destroys PFAS in industrial water, and its reactors ran continuously for 4 weeks on landfill leachate, cutting PFAS from more than 1000 ng/L to below 10 ng/L.
54 Puraffinity Puraffinity removes PFAS forever chemicals from water with advanced adsorbent materials for multiple water treatment applications, and has raised $13.9m in Series A funding.
55 CoreWater Technologies CoreWater Technologies captures, isolates and destroys PFAS contaminants during water treatment and has drawn $2.9 million in private investment so far.
56 Sequestro Sequestro removes PFAS from contaminated water with bio-renewable cellulose-based adsorbents that achieved greater than 80-90% removal of PFOA and PFOS within a 30-second contact time.
57 Crew Carbon Crew Carbon optimizes wastewater treatment while removing carbon dioxide, and since launching commercial operations in 2024 it has deployed at nearly 10 wastewater treatment facilities in the US and Europe.
58 Source Global Source Global makes solar-powered Hydropanel systems that produce drinking water from air, and its systems are used across six continents and more than 50 countries.
59 TaKaDu TaKaDu detects and manages leaks and other events in water networks, enabling about 1 billion liters of water savings annually for utilities.
60 Ayyeka Technologies Ayyeka provides remote monitoring and analytics for water and wastewater infrastructure, and its devices and platform helped Cincinnati increase its collection network capacity by 20%.