Company lists · Data refreshed September 2026

Top 25 Water treatment consulting firms worldwide

Name: Water treatment consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 15,135 companies tracked

RevenueBase identified 15,135 company matches for water treatment consulting firms worldwide as of September 2026 and tracks 215,185 professional contacts across them, including 57,720 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers company matches for water treatment consulting firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 2026. Country and city lists for water treatment consulting firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built

15,135Companies

215,185Contacts tracked

57,720Verified emails

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The 25 largest water treatment consulting firms worldwide

Ranked by team size

Top 25 of 15,135 company matches for water treatment consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Sep 27, 2026	10001+	12,999 contacts →
	Exact match “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2	Solenis	Exact match	Wilmington, DE, United StatesHQ recorded Sep 27, 2026	10001+	6,128 contacts →
	Exact match “Solenis is a leading global provider of water and hygiene solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3	ION Exchange India LTD	Exact match	Mumbai, IndiaHQ recorded Sep 27, 2026	1,001-5,000	3,810 contacts →
	Exact match “At Ion Exchange India, we bring you total environment solutions - water treatment, liquid waste treatment & recycle, air pollution control, solid & hazardous waste management and…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,473 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	VA Tech Wabag LTD	Exact match	Wabag House, IndiaHQ recorded Sep 27, 2026	1,001-5,000	2,375 contacts →
	Exact match “WABAG, a global leader in the water industry, is backed by rich experience spanning over 100 years.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,145 contacts →
	Exact match “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,100 contacts →
	Exact match “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8	Culligan International	Exact match	Rosemont, IL, United StatesHQ recorded Sep 27, 2026	10001+	1,830 contacts →
	Exact match “There’s nothing more fundamental to life on Earth than water.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9	Carollo Engineers	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,718 contacts →
	Exact match “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	Chemtreat	Exact match	Glen Allen, VA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,404 contacts →
	Exact match “At ChemTreat, we understand that water is a vital resource for our planet.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11	Kurita Group	Exact match	Tokyo, JapanHQ recorded Sep 27, 2026	5,001-10,000	1,360 contacts →
	Exact match “For more than 70 years, since its founding in 1949, Kurita Water Industries has been consistently operating in two areas of "water and the environment." Kurita Group provides…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	Volvo Eicher Commerical Vehical Limited	Exact match	Dhar, IndiaHQ recorded Sep 27, 2026	n/a	1,196 contacts →
	Exact match “Volvo Eicher Commerical Vehical Limited Service Provider of waste water recycling systems, drinking water plant & industrial water treatment in Indore, Madhya Pradesh.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13	WSP EN Chile	Exact match	Vitacura, ChileHQ recorded Sep 27, 2026	10001+	988 contacts →
	Exact match “WSP en una empresa líder en servicios profesionales de consultoría en recursos hídricos, ingeniería, medio ambiente y sustentabilidad.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14	Aquatech	Exact match	Canonsburg, PA, United StatesHQ recorded Sep 27, 2026	501-1,000	903 contacts →
	Exact match “Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15	MWH Treatment	Exact match	Stockport, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	879 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	Chem-Aqua, INC	Exact match	Wilmington, DE, United StatesHQ recorded Sep 27, 2026	10001+	864 contacts →
	Exact match “Chem-Aqua is a unique combination of knowledge, experience and stability.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17	Binnies	Exact match	Redhill, United KingdomHQ recorded Sep 27, 2026	501-1,000	842 contacts →
	Exact match “Together with our strategic partners, we can address everything from supporting vulnerable customers, water quality, asset performance and leak detection, to integrated planning…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	OVIVO	Exact match	Montreal, QC, CanadaHQ recorded Sep 27, 2026	501-1,000	829 contacts →
	Exact match “Ovivo is a powerful global brand, uniting world-renowned trademarks and a highly specialized team of 700 water treatment experts operating across the globe.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19	Gradiant	Exact match	Woburn, MA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	813 contacts →
	Exact match “Gradiant is a Different Kind of Water Company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	Antea Group - France	Exact match	Olivet, FranceHQ recorded Sep 27, 2026	1,001-5,000	737 contacts →
	Exact match “Antea Group est une société internationale d’ingénierie et de conseil en environnement.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21	Trojan Technologies	Exact match	London, ON, CanadaHQ recorded Sep 27, 2026	501-1,000	716 contacts →
	Exact match “Our Vision To continuously advance water treatment, ensuring everyone has access to clean water, globally.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	Grupo Bauminas	Exact match	Cataguazes, BrazilHQ recorded Sep 27, 2026	1,001-5,000	650 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23	Nijhuis Saur Industries	Exact match	Doetinchem, NetherlandsHQ recorded Sep 27, 2026	1,001-5,000	609 contacts →
	Exact match “Founded in 1904, Nijhuis Saur Industries provides solid and adaptive solutions for sustainable and resilient water use, energy- and resource recovery.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24	Culligan France	Exact match	Versailles, FranceHQ recorded Sep 27, 2026	1,001-5,000	607 contacts →
	Exact match “Spécialiste du traitement de l’eau depuis plus de 80 ans, Culligan apporte chaque jour une eau de qualité aux particuliers, aux entreprises et aux collectivités.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25	IDE Technologies	Exact match	Kadima, IsraelHQ recorded Sep 27, 2026	501-1,000	603 contacts →
	Exact match “A world leader in water treatment solutions, IDE specializes in the development, engineering, construction and operation of enhanced desalination and industrial water treatment…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “water treatment consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 15,135 water treatment consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 57,720 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water treatment consulting firms worldwide at a glance

As of Sep 27, 2026

26.8%Verified-email coverage

14.2Average contacts per company

11-50Median size (employees)

0.9%Largest-city concentration · Pune

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

6,968

11-50

5,412

51-200

1,885

201-500

471

501-1,000

142

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for water treatment consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “water treatment consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 57,720 professional contacts with verified work emails across the full matched dataset. 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 27, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Water treatment consulting firms by location

49 lists · largest first

Every Water treatment consulting firms 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “water treatment consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water treatment consulting firms are there worldwide?

RevenueBase identified 15,135 company matches for water treatment consulting firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Tetra Tech tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most water treatment consulting firms?

The United States leads with 2,872 companies, followed by India (1,521) and Brazil (812). Every water treatment consulting firms list by country and city is linked on this page.

Which city has the most water treatment consulting firms?

Pune leads with 135 company records, followed by Ahmedabad (116) and Chennai (105).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 57,720 professional contacts with verified work emails tracked across these 15,135 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 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 SmartSearch, 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.