Company lists · Data refreshed September 2026

Top 25 Water treatment plant construction companies worldwide

Name: Water treatment plant construction companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 7,708 companies tracked

RevenueBase identified 7,708 water treatment plant construction companies worldwide as of September 2026 and tracks 195,674 professional contacts across them, including 55,822 with verified work emails and 0 with mobile numbers. The United States is the largest market and Pune the largest hub.

This list covers water treatment plant construction companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for water treatment plant construction companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

7,708Companies

195,674Contacts tracked

55,822Verified emails

0Mobile numbers

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The 25 largest water treatment plant construction companies worldwide

Ranked by team size

Top 25 of 7,708 water treatment plant construction companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water treatment plant construction companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SUEZ	Partial evidence	Paris, FranceHQ checked Sep 19, 2026	10001+	21,549 contacts →
	Partial evidence “We provide essential services in the water and waste sectors to preserve resources and improve quality of life wherever we operate.” Source: RevenueBase Database · checked Sep 19, 2026
2	XYLEM	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	10001+	9,320 contacts →
	Partial evidence “Xylem is the global leader in advanced technologies, solutions and services that address the world’s biggest water challenges.” Source: RevenueBase Database · checked Sep 19, 2026
3	Pentair	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	6,636 contacts →
	Partial evidence “At Pentair, we help the world sustainably move, improve, and enjoy water, life’s most essential resource.” Source: RevenueBase Database · checked Sep 19, 2026
4	Severn Trent	Partial evidence	Coventry, United KingdomHQ checked Sep 19, 2026	5,001-10,000	5,563 contacts →
	Partial evidence “Water is wonderful.” Source: RevenueBase Database · checked Sep 19, 2026
5	ION Exchange India LTD	Strong evidence	Mumbai, IndiaHQ checked Sep 19, 2026	1,001-5,000	3,810 contacts →
	Strong evidence “At Ion Exchange India, we bring you total environment solutions - water treatment, liquid waste treatment & recycle, air pollution control, solid & hazardous waste management and…” Source: RevenueBase Database · checked Sep 19, 2026
6	SAUR	Partial evidence	Issy-les-moulineaux, FranceHQ checked Sep 19, 2026	10001+	3,694 contacts →
	Partial evidence “As a pure player in water and essential services, Saur works to protect the environment in the heart of the territories it serves.” Source: RevenueBase Database · checked Sep 19, 2026
7	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,473 contacts →
	Indirect evidence “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Source: RevenueBase Database · checked Sep 19, 2026
8	VA Tech Wabag LTD	Partial evidence	Wabag House, IndiaHQ checked Sep 19, 2026	1,001-5,000	2,375 contacts →
	Partial evidence “WABAG, a global leader in the water industry, is backed by rich experience spanning over 100 years.” Source: RevenueBase Database · checked Sep 19, 2026
9	Carollo Engineers	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,718 contacts →
	Partial evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 19, 2026
10	MPW Industrial Services	Partial evidence	Hebron, OH, PalestineHQ checked Sep 19, 2026	1,001-5,000	1,485 contacts →
	Partial evidence “As the leading provider of integrated, technology-based industrial cleaning, water purification, facility management, and total waste services in North America, MPW assists in…” Source: RevenueBase Database · checked Sep 19, 2026
11	Aqualia	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	5,001-10,000	1,395 contacts →
	Partial evidence “Aqualia es la cuarta empresa de gestión del agua de Europa y la novena del Mundo por población servida, según el último ranking de Global Water Intelligence (diciembre de 2024).” Source: RevenueBase Database · checked Sep 19, 2026
12	Volvo Eicher Commerical Vehical Limited	Strong evidence	Dhar, IndiaHQ checked Sep 19, 2026	n/a	1,196 contacts →
	Strong evidence “Volvo Eicher Commerical Vehical Limited Service Provider of waste water recycling systems, drinking water plant & industrial water treatment in Indore, Madhya Pradesh.” Source: RevenueBase Database · checked Sep 19, 2026
13	Zurn Elkay Water Solutions	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,127 contacts →
	Partial evidence “Zurn Elkay Water Solutions supplies the industry’s widest range of clean water solutions for drinking water, hygiene and sustainable water management.” Source: RevenueBase Database · checked Sep 19, 2026
14	Woodard & Curran	Partial evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,060 contacts →
	Partial evidence “Woodard & Curran is more than just a consulting firm – we are an employee-owned integrated science, engineering, design-build, and operations company specializing in water and…” Source: RevenueBase Database · checked Sep 19, 2026
15	Inframark	Partial evidence	Horsham, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	973 contacts →
	Partial evidence “As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.” Source: RevenueBase Database · checked Sep 19, 2026
16	Aquatech	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 19, 2026	501-1,000	903 contacts →
	Partial evidence “Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…” Source: RevenueBase Database · checked Sep 19, 2026
17	MWH Treatment	Strong evidence	Stockport, United KingdomHQ checked Sep 19, 2026	1,001-5,000	879 contacts →
	Strong evidence “MWH Treatment is a leading Design and Build non-infrastructure solution provider in the UK water sector, with a water sector heritage dating back to 1820.” Source: RevenueBase Database · checked Sep 19, 2026
18	Chem-Aqua, INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 19, 2026	10001+	864 contacts →
	Indirect evidence “Chem-Aqua is a unique combination of knowledge, experience and stability.” Source: RevenueBase Database · checked Sep 19, 2026
19	OVIVO	Strong evidence	Montreal, QC, CanadaHQ checked Sep 19, 2026	501-1,000	829 contacts →
	Strong evidence “Ovivo is a powerful global brand, uniting world-renowned trademarks and a highly specialized team of 700 water treatment experts operating across the globe.” Source: RevenueBase Database · checked Sep 19, 2026
20	Gradiant	Partial evidence	Woburn, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	813 contacts →
	Partial evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 19, 2026
21	Thabat Construction	Partial evidence	Riyadh, Saudi ArabiaHQ checked Sep 19, 2026	5,001-10,000	781 contacts →
	Partial evidence “Thabat Construction (Previously known as Al Muhaidib Contracting) was established in 1398 (H), 1977 (G) and is fully Saudi owned.” Source: RevenueBase Database · checked Sep 19, 2026
22	Evides Waterbedrijf	Indirect evidence	Rotterdam, NetherlandsHQ checked Sep 19, 2026	501-1,000	753 contacts →
	Indirect evidence “Duurzaam, innovatief en in verbinding met de omgeving; zo werkt Evides Waterbedrijf.” Source: RevenueBase Database · checked Sep 19, 2026
23	Trojan Technologies	Strong evidence	London, ON, CanadaHQ checked Sep 19, 2026	501-1,000	716 contacts →
	Strong evidence “Our Vision To continuously advance water treatment, ensuring everyone has access to clean water, globally.” Source: RevenueBase Database · checked Sep 19, 2026
24	Ontario Clean Water Agency	Partial evidence	Mississauga, ON, CanadaHQ checked Sep 19, 2026	501-1,000	662 contacts →
	Partial evidence “Water is one of our most precious resources.” Source: RevenueBase Database · checked Sep 19, 2026
25	Grupo Bauminas	Indirect evidence	Cataguazes, BrazilHQ checked Sep 19, 2026	1,001-5,000	650 contacts →
	Indirect evidence “Sobre a BAUMINAS Fundada há mais de 60 anos, a BAUMINAS é uma empresa orgulhosamente nacional, com ampla experiência na fabricação de produtos para o tratamento de águas e tem…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: water treatment plant construction companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names water treatment plant construction companies.
Partial evidence: Its own public description names part of water treatment plant construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water treatment plant construction companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 7,708 water treatment plant construction companies worldwide

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Water treatment plant construction companies worldwide at a glance

As of Sep 19, 2026

28.5%Verified-email coverage

25.4Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Pune

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

2,800

11-50

2,978

51-200

1,316

201-500

332

501-1,000

107

1,001-5,000

5,001-10,000

10001+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among water treatment plant construction companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: 41 countries, largest first: the United States, India, Italy, Brazil, Germany, Spain, Türkiye, the United Kingdom, Mexico, Canada and 31 more. Country and city lists for water treatment plant construction companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “water treatment plant construction companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names water treatment plant construction companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among water treatment plant construction companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 55,822 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Water treatment plant construction companies by location

46 lists · largest first

Every Water treatment plant construction companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names water treatment plant construction companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many water treatment plant construction companies are there worldwide?

RevenueBase identified 7,708 water treatment plant construction companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SUEZ, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most water treatment plant construction companies?

The United States leads with 1,489 companies, followed by India (1,343) and Italy (423). Every water treatment plant construction companies list by country and city is linked on this page.

Which city has the most water treatment plant construction companies?

Pune leads with 124 headquartered companies, followed by Chennai (101) and Ahmedabad (98).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 55,822 verified decision-maker contacts tracked across these 7,708 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.