Company lists · Data refreshed September 2026

Top 25 On-site water treatment system contractors based in the United States

Name: On-site water treatment system contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 2,248 companies tracked

RevenueBase identified 2,248 company matches for on-site water treatment system contractors associated with the United States as of September 2026 and tracks 41,693 professional contacts across them, including 15,554 with verified work emails. Houston is the largest hub.

This list covers company matches for on-site water treatment system contractors associated with the United States, 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 17, 2026.

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 17, 2026 How this list was built

2,248Companies

41,693Contacts tracked

15,554Verified emails

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The 25 largest on-site water treatment system contractors based in the United States

Ranked by team size

Top 25 of 2,248 company matches for on-site water treatment system contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	Solenis	Exact match	Wilmington, DE, United StatesHQ recorded Sep 17, 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 17, 2026 · View company records in RevenueBase
2	Chemtreat	Exact match	Glen Allen, VA, United StatesHQ recorded Sep 17, 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 17, 2026 · View company records in RevenueBase
3	Aquatech	Exact match	Canonsburg, PA, United StatesHQ recorded Sep 17, 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 17, 2026 · View company records in RevenueBase
4	Chem-Aqua, INC	Exact match	Wilmington, DE, United StatesHQ recorded Sep 17, 2026	10001+	864 contacts →
	Exact match “Chem-Aqua is a unique combination of knowledge, experience and stability.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Gradiant	Exact match	Woburn, MA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	813 contacts →
	Exact match “Gradiant is a Different Kind of Water Company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Ceco Environmental Corporation	Exact match	Addison, TX, United StatesHQ recorded Sep 17, 2026	1,001-5,000	646 contacts →
	Exact match “CECO Environmental is a leading environmentally focused, diversified industrial company whose solutions protect people, the environment, and industrial equipment across the globe…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Westech Engineering	Exact match	Salt Lake City, UT, United StatesHQ recorded Sep 17, 2026	501-1,000	554 contacts →
	Exact match “WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	UCC Environmental	Exact match	Waukegan, IL, United StatesHQ recorded Sep 17, 2026	201-500	389 contacts →
	Exact match “UCC Environmental (UCC) is a global leader in environmental solutions for solids handling, wastewater treatment and pollution control technologies in power generation and other…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Culligan Water	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 17, 2026	51-200	354 contacts →
	Exact match “At Culligan Water Conditioning of Jacksonville FL, we not only aim to provide better water to the community, we are also committed to building a better, more sustainable world.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Parkson Corporation	Exact match	Fort Lauderdale, FL, United StatesHQ recorded Sep 17, 2026	51-200	317 contacts →
	Exact match “Parkson Corporation is a supplier of innovative, cost effective solutions for potable water, process water, and industrial and municipal wastewater treatment.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Exact match	Old Saybrook, CT, United StatesHQ recorded Sep 17, 2026	501-1,000	295 contacts →
	Exact match “Protecting the environment with innovative wastewater treatment solutions for over 35 years, Infiltrator is the leading manufacturer of onsite wastewater treatment products in…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Prominent North America	Exact match	Pit, United StatesHQ recorded Sep 17, 2026	201-500	251 contacts →
	Exact match “ProMinent North America is part of the global ProMinent Group, a pioneer in metering technology and water treatment solutions with roots in Heidelberg, Germany.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Huber Technology US	Exact match	Denver, NC, United StatesHQ recorded Sep 17, 2026	201-500	243 contacts →
	Exact match “HUBER Technology, LLC, the U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Usabluebook	Exact match	Waukegan, IL, United StatesHQ recorded Sep 17, 2026	5,001-10,000	241 contacts →
	Exact match “Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Usalco	Exact match	Baltimore, MD, United StatesHQ recorded Sep 17, 2026	501-1,000	222 contacts →
	Exact match “Water powers life.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Aqua-Aerobic Systems, INC	Exact match	Loves Park, IL, United StatesHQ recorded Sep 17, 2026	51-200	207 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Phigenics	Exact match	Warrenville, IL, United StatesHQ recorded Sep 17, 2026	51-200	197 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Fluence Corporation	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 17, 2026	201-500	195 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Newterra	Exact match	Coraopolis, PA, United StatesHQ recorded Sep 17, 2026	201-500	185 contacts →
	Exact match “Newterra designs, engineers, manufactures, and services environmental, water and wastewater treatment solutions that assure great performance, superb reliability, and the highest…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Smith & Loveless INC	Exact match	Lenexa, KS, United StatesHQ recorded Sep 17, 2026	201-500	172 contacts →
	Exact match “S&L delivers long-lasting, reliable and easy-to-operate wastewater pumping and treatment systems for municipal, federal, and industrial-commercial applications.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Orenco Systems, INC	Exact match	Sutherlin, OR, United StatesHQ recorded Sep 17, 2026	201-500	170 contacts →
	Exact match “Nobody wants to worry about whether their wastewater is contaminating nearby rivers, streams, and wells.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Bosque Systems, LLC	Exact match	Fort Worth, TX, United StatesHQ recorded Sep 17, 2026	51-200	155 contacts →
	Exact match “At Bosque Systems, we understand the importance of providing customized water management solutions to our customers, oil and gas operators.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Aqua-Chem	Exact match	Knoxville, TN, United StatesHQ recorded Sep 17, 2026	201-500	152 contacts →
	Exact match “Aqua-Chem is the leader in providing Global Water Solutions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	LB Water	Exact match	Selinsgrove, PA, United StatesHQ recorded Sep 17, 2026	201-500	147 contacts →
	Exact match “100% Employee Owned LB Water has been providing quality water and wastewater solutions for decades.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Apex Water And Process	Exact match	St Michael, MN, United StatesHQ recorded Sep 17, 2026	201-500	143 contacts →
	Exact match “Apex, a trusted leader in water and process management, delivers integrated solutions that empower agricultural, commercial, and industrial customers across the U.S.” Recorded in the RevenueBase company graph · Sep 17, 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 “on-site water treatment system contractors”. 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 2,248 on-site water treatment system contractors based in the United States

See the full list, filter by size, metro and specialty, and access 15,554 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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On-site water treatment system contractors based in the United States at a glance

As of Sep 17, 2026

37.3%Verified-email coverage

18.5Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,014

11-50

817

51-200

291

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 2,248 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “on-site water treatment system contractors” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 15,554 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 17, 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.

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 “on-site water treatment system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many on-site water treatment system contractors are there based in the United States?

RevenueBase identified 2,248 company matches for on-site water treatment system contractors associated with the United States 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?

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

Which city has the most on-site water treatment system contractors?

Houston leads with 47 company records, followed by Phoenix (23) and Tampa (18).

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 15,554 professional contacts with verified work emails tracked across these 2,248 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 17, 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.