Company lists · Data refreshed September 2026

Top 25 Water desalination engineering firms based in the United States

Name: Water desalination engineering firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 647 companies tracked

RevenueBase identified 647 water desalination engineering firms headquartered in the United States as of September 2026 and tracks 11,185 professional contacts across them, including 3,948 with verified work emails. Houston is the largest hub.

This list covers water desalination engineering firms headquartered in the United States, 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.

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

647Companies

11,185Contacts tracked

3,948Verified emails

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The 25 largest water desalination engineering firms based in the United States

Ranked by team size

Top 25 of 647 water desalination engineering firms based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water desalination engineering firms: 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	Aquatech	Strong evidence	Canonsburg, PA, United StatesHQ checked Sep 19, 2026	501-1,000	903 contacts →
	Strong 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
2	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
3	Westech Engineering	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 19, 2026	501-1,000	554 contacts →
	Strong evidence “WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
4	Culligan By Waterco	Partial evidence	Lombard, IL, United StatesHQ checked Sep 19, 2026	501-1,000	265 contacts →
	Partial evidence “Culligan has over 80 years of experience in the design and distribution of water treatment systems for residential, commercial and industrial applications.” Source: RevenueBase Database · checked Sep 19, 2026
5	Huber Technology US	Indirect evidence	Denver, NC, United StatesHQ checked Sep 19, 2026	201-500	243 contacts →
	Indirect evidence “HUBER Technology, LLC, the U.S.” Source: RevenueBase Database · checked Sep 19, 2026
6	Energy Recovery, INC	Indirect evidence	San Leandro, CA, United StatesHQ checked Sep 19, 2026	201-500	219 contacts →
	Indirect evidence “Energy Recovery (Nasdaq: ERII) designs and manufactures world-class energy-saving technology for critical infrastructure that communities rely on every day, driving a more…” Source: RevenueBase Database · checked Sep 19, 2026
7	Fluence Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	201-500	195 contacts →
	Partial evidence “Formed in 2017 following the consolidation of independent water treatment solution providers Emefcy and RWL Water, Fluence Corporation was established with the vision of becoming…” Source: RevenueBase Database · checked Sep 19, 2026
8	Newterra	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 19, 2026	201-500	185 contacts →
	Partial evidence “Newterra designs, engineers, manufactures, and services environmental, water and wastewater treatment solutions that assure great performance, superb reliability, and the highest…” Source: RevenueBase Database · checked Sep 19, 2026
9	Felix Construction Company	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 19, 2026	201-500	178 contacts →
	Strong evidence “Felix Construction Company is a general engineering contractor and construction management company with a specific focus on: Water production facilities, well sites, booster pump…” Source: RevenueBase Database · checked Sep 19, 2026
10	Aqua-Chem	Partial evidence	Knoxville, TN, United StatesHQ checked Sep 19, 2026	201-500	152 contacts →
	Partial evidence “Aqua-Chem is the leader in providing Global Water Solutions.” Source: RevenueBase Database · checked Sep 19, 2026
11	Avantech, LLC	Partial evidence	Columbia, SC, United StatesHQ checked Sep 19, 2026	51-200	117 contacts →
	Partial evidence “AVANTech, LLC is a comprehensive industrial water treatment solutions provider.” Source: RevenueBase Database · checked Sep 19, 2026
12	Taylor Engineering	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 19, 2026	51-200	105 contacts →
	Partial evidence “Since 1987, Taylor Engineering, Inc, with headquarters in Jacksonville, Florida; branch offices in Destin and Tampa, Florida; and regional staff throughout Florida and the North…” Source: RevenueBase Database · checked Sep 19, 2026
13	Prochem INC	Indirect evidence	Elliston, VA, United StatesHQ checked Sep 19, 2026	51-200	95 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
14	Puretec Industrial Water	Partial evidence	Oxnard, CA, United StatesHQ checked Sep 19, 2026	51-200	91 contacts →
	Partial evidence “Puretec provides water treatment solutions that transform incoming city water into highly purified deionized water suitable for hundreds of industrial applications across dozens…” Source: RevenueBase Database · checked Sep 19, 2026
15	HYDRO	Partial evidence	Durham, NC, United StatesHQ checked Sep 19, 2026	51-200	86 contacts →
	Partial evidence “We Design, Build, Install, Start Up, and Validate High-Purity Water Systems-Improving Lives Through Water Purification.” Source: RevenueBase Database · checked Sep 19, 2026
16	Cummins Cederberg	Partial evidence	Coral Gables, FL, United StatesHQ checked Sep 19, 2026	51-200	82 contacts →
	Partial evidence “Cummins Cederberg is a leader in coastal and marine engineering, delivering solutions for some of the most complex and high-impact waterfront projects.” Source: RevenueBase Database · checked Sep 19, 2026
17	Samco Technologies	Partial evidence	Buffalo, NY, United StatesHQ checked Sep 19, 2026	51-200	82 contacts →
	Partial evidence “At SAMCO Technologies, Inc, we provide cutting-edge water, wastewater, and process separation solutions for some of the world’s most demanding industries, including power…” Source: RevenueBase Database · checked Sep 19, 2026
18	Water & Wastewater Equipment Company	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 19, 2026	11-50	80 contacts →
	Partial evidence “Water and Wastewater Equipment Company has been providing efficient, cost-effective and compliant solutions to water and wastewater treatment applications for over 30 years.” Source: RevenueBase Database · checked Sep 19, 2026
19	FEDCO	Partial evidence	Monroe, MI, United StatesHQ checked Sep 19, 2026	51-200	79 contacts →
	Partial evidence “FEDCO is a global leader in the manufacture and sale of pumps and energy recovery devices (ERDs) for brackish and seawater reverse osmosis (RO) desalination systems.” Source: RevenueBase Database · checked Sep 19, 2026
20	LEE RO	Partial evidence	City Of Industry, CA, United StatesHQ checked Sep 19, 2026	51-200	78 contacts →
	Partial evidence “Water: It’s a human thing.” Source: RevenueBase Database · checked Sep 19, 2026
21	Homeyer Consulting Services, INC	Indirect evidence	Tewksbury, MA, United StatesHQ checked Sep 19, 2026	11-50	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Marlo Incorporated	Partial evidence	Racine, WI, United StatesHQ checked Sep 19, 2026	51-200	62 contacts →
	Partial evidence “For 50 years, Marlo Incorporated has engineered and manufactured high quality water treatment equipment for a wide variety of residential, commercial, and industrial applications.” Source: RevenueBase Database · checked Sep 19, 2026
23	Wigen Water Technologies	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	51-200	62 contacts →
	Partial evidence “Founded in 1965, Wigen Water Technologies® is a global leader in the production of custom water treatment systems, specializing in cost-effective and reliable solutions for…” Source: RevenueBase Database · checked Sep 19, 2026
24	Atlas-Ssi	Strong evidence	Monticello, MS, United StatesHQ checked Sep 19, 2026	201-500	61 contacts →
	Strong evidence “Atlas-SSI has expertise in engineering and manufacturing complete custom raw water intake systems and bulk material handling equipment.” Source: RevenueBase Database · checked Sep 19, 2026
25	PLW Waterworks	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 19, 2026	501-1,000	61 contacts →
	Partial evidence “PLW Waterworks is an innovative waterworks infrastructure construction management and general contractor serving municipalities, water districts and water authorities across Texas…” 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 desalination engineering firms. 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 desalination engineering firms.
Partial evidence: Its own public description names part of water desalination engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water desalination engineering firms. 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 647 water desalination engineering firms based in the United States

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Water desalination engineering firms based in the United States at a glance

As of Sep 19, 2026

35.3%Verified-email coverage

17.3Average contacts per company

11-50Median size (employees)

3.6%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

296

11-50

241

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 647 companies.

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 desalination engineering firms, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “water desalination engineering firms”. 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 desalination engineering firms), 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 desalination engineering firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 3,948 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.

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 desalination engineering firms, 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 desalination engineering firms are there based in the United States?

RevenueBase identified 647 water desalination engineering firms headquartered in the United States 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?

Aquatech, headquartered in Canonsburg, tops this list with the largest team on record.

Which city has the most water desalination engineering firms?

Houston leads with 23 headquartered companies, followed by Austin (8) and Los Angeles (8).

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 3,948 verified decision-maker contacts tracked across these 647 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.