Company lists · Data refreshed September 2026

Top 25 Water quality consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 9,264 companies tracked

RevenueBase identified 9,264 company matches for water quality consulting firms worldwide as of September 2026 and tracks 161,375 professional contacts across them, including 51,461 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for water quality 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 29, 2026. Country and city lists for water quality 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 29, 2026 How this list was built

9,264Companies

161,375Contacts tracked

51,461Verified emails

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The 25 largest water quality consulting firms worldwide

Ranked by team size

Top 25 of 9,264 company matches for water quality consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 29, 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 29, 2026 · View company records in RevenueBase
2	Solenis	Exact match	Wilmington, DE, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
3	ION Exchange India LTD	Exact match	Mumbai, IndiaHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
4	HACH	Exact match	Loveland, CO, United StatesHQ recorded Sep 29, 2026	1,001-5,000	3,095 contacts →
	Exact match “At Hach, we ensure water quality for people around the world, and every associate plays a vital role in that mission.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
6	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
7	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
8	Culligan International	Exact match	Rosemont, IL, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
9	Carollo Engineers	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
10	DHI	Exact match	Hørsholm, DenmarkHQ recorded Sep 29, 2026	1,001-5,000	1,427 contacts →
	Exact match “There is no substitute for water.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,137 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	WSP EN Chile	Exact match	Vitacura, ChileHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
13	Inframark	Exact match	Horsham, PA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	973 contacts →
	Exact match “As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	961 contacts →
	Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Alliance Technical Group	Exact match	Decatur, AL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	956 contacts →
	Exact match “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	ATC Group Services LLC	Exact match	Lafayette, LA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	865 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Chem-Aqua, INC	Exact match	Wilmington, DE, United StatesHQ recorded Sep 29, 2026	10001+	864 contacts →
	Exact match “Chem-Aqua is a unique combination of knowledge, experience and stability.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Binnies	Exact match	Redhill, United KingdomHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
19	OVIVO	Exact match	Montreal, QC, CanadaHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
20	Evides Waterbedrijf	Exact match	Rotterdam, NetherlandsHQ recorded Sep 29, 2026	501-1,000	753 contacts →
	Exact match “Duurzaam, innovatief en in verbinding met de omgeving; zo werkt Evides Waterbedrijf.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Antea Group - France	Exact match	Olivet, FranceHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
22	Trojan Technologies	Exact match	London, ON, CanadaHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
23	Nijhuis Saur Industries	Exact match	Doetinchem, NetherlandsHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
24	Culligan France	Exact match	Versailles, FranceHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
25	Kennedy Jenks	Exact match	San Francisco, CA, United StatesHQ recorded Sep 29, 2026	201-500	578 contacts →
	Exact match “For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded in the RevenueBase company graph · Sep 29, 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 quality 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 9,264 water quality consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 51,461 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water quality consulting firms worldwide at a glance

As of Sep 29, 2026

31.9%Verified-email coverage

17.4Average contacts per company

1-10Median size (employees)

0.7%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

4,629

11-50

3,170

51-200

1,018

201-500

236

501-1,000

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 quality consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “water quality 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 51,461 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 29, 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 quality consulting firms by location

42 lists · largest first

Every Water quality 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 quality consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water quality consulting firms are there worldwide?

RevenueBase identified 9,264 company matches for water quality 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 quality consulting firms?

The United States leads with 2,448 companies, followed by Brazil (631) and India (603). Every water quality consulting firms list by country and city is linked on this page.

Which city has the most water quality consulting firms?

Sao Paulo leads with 63 company records, followed by Pune (62) and Ahmedabad (47).

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 51,461 professional contacts with verified work emails tracked across these 9,264 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 29, 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.