Company lists · Data refreshed September 2026

Top 25 Water treatment facilities based in the United States

Name: Water treatment facilities based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 1,301 companies tracked

RevenueBase identified 1,301 water treatment facilities headquartered in the United States as of September 2026 and tracks 22,895 professional contacts across them, including 8,095 with verified work emails. Houston is the largest hub.

This list covers water treatment facilities 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 22, 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 22, 2026 86% judged on-target in blind review

1,301Companies

22,895Contacts tracked

8,095Verified emails

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The 25 largest water treatment facilities based in the United States

Ranked by team size

Top 25 of 1,301 water treatment facilities based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to water treatment facilities: 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	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 22, 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 22, 2026
2	Chem-Aqua, INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 22, 2026	10001+	864 contacts →
	Indirect evidence “Chem-Aqua is a unique combination of knowledge, experience and stability.” Source: RevenueBase Database · checked Sep 22, 2026
3	Gradiant	Partial evidence	Woburn, MA, United StatesHQ checked Sep 22, 2026	1,001-5,000	813 contacts →
	Partial evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 22, 2026
4	Westech Engineering	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 22, 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 22, 2026
5	Parkson Corporation	Strong evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 22, 2026	51-200	317 contacts →
	Strong evidence “Parkson Corporation is a supplier of innovative, cost effective solutions for potable water, process water, and industrial and municipal wastewater treatment.” Source: RevenueBase Database · checked Sep 22, 2026
6	Culligan By Waterco	Strong evidence	Lombard, IL, United StatesHQ checked Sep 22, 2026	501-1,000	265 contacts →
	Strong 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 22, 2026
7	Toho Water Authority	Partial evidence	Kissimmee, FL, United StatesHQ checked Sep 22, 2026	501-1,000	256 contacts →
	Partial evidence “Toho Water Authority was established in 2003 by a special act of the Florida legislature and provides a full range of water, wastewater and reclaimed water services to its…” Source: RevenueBase Database · checked Sep 22, 2026
8	Prominent North America	Strong evidence	Pit, United StatesHQ checked Sep 22, 2026	201-500	251 contacts →
	Strong evidence “ProMinent North America is part of the global ProMinent Group, a pioneer in metering technology and water treatment solutions with roots in Heidelberg, Germany.” Source: RevenueBase Database · checked Sep 22, 2026
9	Alcosan	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	201-500	242 contacts →
	Indirect evidence “ALCOSAN is one of the Pittsburgh region’s premiere environmental and public health organizations, treating wastewater for 83 Allegheny County communities, including the City of…” Source: RevenueBase Database · checked Sep 22, 2026
10	Usabluebook	Partial evidence	Waukegan, IL, United StatesHQ checked Sep 22, 2026	5,001-10,000	241 contacts →
	Partial evidence “Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.” Source: RevenueBase Database · checked Sep 22, 2026
11	Usalco	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 22, 2026	501-1,000	222 contacts →
	Partial evidence “Water powers life.” Source: RevenueBase Database · checked Sep 22, 2026
12	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 22, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
13	Phigenics	Partial evidence	Warrenville, IL, United StatesHQ checked Sep 22, 2026	51-200	197 contacts →
	Partial evidence “Phigenics is a leading provider of safe, smart, and superior water management programs aligned with ANSI/ASHRAE Standard 188 and Centers for Medicare & Medicaid Services (CMS) QSO…” Source: RevenueBase Database · checked Sep 22, 2026
14	Fluence Corporation	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 22, 2026	201-500	195 contacts →
	Strong 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 22, 2026
15	Newterra	Strong evidence	Coraopolis, PA, United StatesHQ checked Sep 22, 2026	201-500	185 contacts →
	Strong 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 22, 2026
16	Smith & Loveless INC	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 22, 2026	201-500	172 contacts →
	Partial evidence “S&L delivers long-lasting, reliable and easy-to-operate wastewater pumping and treatment systems for municipal, federal, and industrial-commercial applications.” Source: RevenueBase Database · checked Sep 22, 2026
17	Orenco Systems, INC	Indirect evidence	Sutherlin, OR, United StatesHQ checked Sep 22, 2026	201-500	170 contacts →
	Indirect evidence “Nobody wants to worry about whether their wastewater is contaminating nearby rivers, streams, and wells.” Source: RevenueBase Database · checked Sep 22, 2026
18	Aqua-Chem	Partial evidence	Knoxville, TN, United StatesHQ checked Sep 22, 2026	201-500	152 contacts →
	Partial evidence “Aqua-Chem is the leader in providing Global Water Solutions.” Source: RevenueBase Database · checked Sep 22, 2026
19	Palm Beach County Water Utilities Department	Partial evidence	West Palm Beach, FL, United StatesHQ checked Sep 22, 2026	501-1,000	151 contacts →
	Partial evidence “The third largest water utility department in the State of Florida, the Palm Beach County Water Utilities Department (PBCWUD) provides drinking water, wastewater collection and…” Source: RevenueBase Database · checked Sep 22, 2026
20	Apex Water And Process	Partial evidence	St Michael, MN, United StatesHQ checked Sep 22, 2026	201-500	143 contacts →
	Partial evidence “Apex, a trusted leader in water and process management, delivers integrated solutions that empower agricultural, commercial, and industrial customers across the U.S.” Source: RevenueBase Database · checked Sep 22, 2026
21	Clack Corporation	Strong evidence	Windsor, WI, United StatesHQ checked Sep 22, 2026	201-500	142 contacts →
	Strong evidence “Established in 1944, Clack Corporation has been providing quality industrial water treatment products, commercial water treatment equipment and molded custom plastic containers.” Source: RevenueBase Database · checked Sep 22, 2026
22	UOSA	Partial evidence	Leesburg, VA, United StatesHQ checked Sep 22, 2026	51-200	130 contacts →
	Partial evidence “Water Reclamation Plant” Source: RevenueBase Database · checked Sep 22, 2026
23	Rice Lake Construction Group	Partial evidence	Deerwood, MN, United StatesHQ checked Sep 22, 2026	201-500	125 contacts →
	Partial evidence “At Rice Lake Construction Group, we know water.” Source: RevenueBase Database · checked Sep 22, 2026
24	Barclay Water Management, INC	Partial evidence	Newton, MA, United StatesHQ checked Sep 22, 2026	51-200	119 contacts →
	Partial evidence “Established in 1932 and headquartered in Newton, Massachusetts, Barclay Water Management, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
25	Avantech, LLC	Strong evidence	Columbia, SC, United StatesHQ checked Sep 22, 2026	51-200	117 contacts →
	Strong evidence “AVANTech, LLC is a comprehensive industrial water treatment solutions provider.” Source: RevenueBase Database · checked Sep 22, 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 facilities. 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 facilities.
Partial evidence: Its own public description names part of water treatment facilities, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water treatment facilities. 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 1,301 water treatment facilities based in the United States

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Water treatment facilities based in the United States at a glance

As of Sep 22, 2026

35.4%Verified-email coverage

17.6Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

528

11-50

500

51-200

192

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,301 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 treatment facilities, 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 treatment facilities”. 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 facilities), 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 facilities, 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, 8,095 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 22, 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 facilities by metro

Water treatment facilities in Houston31

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 facilities, 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 facilities are there based in the United States?

RevenueBase identified 1,301 water treatment facilities 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 treatment facilities?

Houston leads with 31 headquartered companies, followed by Tampa (12) and Indianapolis (11).

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 8,095 verified decision-maker contacts tracked across these 1,301 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 22, 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.