Company lists · Data refreshed September 2026

Top 25 Chemical processing wastewater treatment companies based in the United States

Name: Chemical processing wastewater treatment companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 801 companies tracked

RevenueBase identified 801 chemical processing wastewater treatment companies headquartered in the United States as of September 2026 and tracks 23,113 professional contacts across them, including 10,296 with verified work emails. Houston is the largest hub.

This list covers chemical processing wastewater treatment companies 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 16, 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 16, 2026 86% judged on-target in blind review

801Companies

23,113Contacts tracked

10,296Verified emails

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The 25 largest chemical processing wastewater treatment companies based in the United States

Ranked by team size

Top 25 of 801 chemical processing wastewater treatment companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to chemical processing wastewater treatment companies: 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	Solenis	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 16, 2026	10001+	6,128 contacts →
	Indirect evidence “Solenis is a leading global provider of water and hygiene solutions.” Source: RevenueBase Database · checked Sep 16, 2026
2	Chemtreat	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,404 contacts →
	Indirect evidence “At ChemTreat, we understand that water is a vital resource for our planet.” Source: RevenueBase Database · checked Sep 16, 2026
3	Crystal Clean	Indirect evidence	Hoffman Estates, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	899 contacts →
	Indirect evidence “Crystal Clean is a national leader in the environmental services market, providing the smart alternative.” Source: RevenueBase Database · checked Sep 16, 2026
4	Gradiant	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	813 contacts →
	Indirect evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 16, 2026
5	Westech Engineering	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 16, 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 16, 2026
6	Evergreen North America Industrial Services	Indirect evidence	La Porte, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	468 contacts →
	Indirect evidence “Evergreen North America Industrial Services offers a comprehensive range of Industrial Services for oil refineries, petrochemical plants, power generation plants, manufacturing…” Source: RevenueBase Database · checked Sep 16, 2026
7	Liquid Environmental Solutions	Partial evidence	Irving, TX, United StatesHQ checked Sep 16, 2026	501-1,000	427 contacts →
	Partial evidence “Liquid Environmental Solutions - the largest, exclusively non-hazardous US wastewater collection and disposal company, is known for innovation and leadership in protecting…” Source: RevenueBase Database · checked Sep 16, 2026
8	UCC Environmental	Strong evidence	Waukegan, IL, United StatesHQ checked Sep 16, 2026	201-500	389 contacts →
	Strong evidence “UCC Environmental (UCC) is a global leader in environmental solutions for solids handling, wastewater treatment and pollution control technologies in power generation and other…” Source: RevenueBase Database · checked Sep 16, 2026
9	Parkson Corporation	Strong evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 16, 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 16, 2026
10	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Strong evidence	Old Saybrook, CT, United StatesHQ checked Sep 16, 2026	501-1,000	295 contacts →
	Strong evidence “Protecting the environment with innovative wastewater treatment solutions for over 35 years, Infiltrator is the leading manufacturer of onsite wastewater treatment products in…” Source: RevenueBase Database · checked Sep 16, 2026
11	Valicor	Indirect evidence	Monroe, OH, United StatesHQ checked Sep 16, 2026	201-500	254 contacts →
	Indirect evidence “Valicor is a trusted partner for sustainable waste management solutions.” Source: RevenueBase Database · checked Sep 16, 2026
12	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 16, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
13	Stage 3 Separation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	201-500	205 contacts →
	Indirect evidence “Stage 3 Separation is North America’s leading service provider for fluid conservation, solids control and waste mitigation.” Source: RevenueBase Database · checked Sep 16, 2026
14	Altivia	Strong evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	201-500	197 contacts →
	Strong evidence “Headquartered in Houston, Texas, privately-held ALTIVIA was founded in 1986 as a water treatment chemical producer.” Source: RevenueBase Database · checked Sep 16, 2026
15	Fluence Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 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 16, 2026
16	Newterra	Strong evidence	Coraopolis, PA, United StatesHQ checked Sep 16, 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 16, 2026
17	Apex Water And Process	Indirect evidence	St Michael, MN, United StatesHQ checked Sep 16, 2026	201-500	143 contacts →
	Indirect 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 16, 2026
18	Resintech INC	Partial evidence	Camden, NJ, United StatesHQ checked Sep 16, 2026	51-200	143 contacts →
	Partial evidence “ResinTech Inc, an acknowledged leader in ion exchange, manufactures a broad range of ion exchange resins for water and waste water treatment, including deionization,softening…” Source: RevenueBase Database · checked Sep 16, 2026
19	Clack Corporation	Partial evidence	Windsor, WI, United StatesHQ checked Sep 16, 2026	201-500	142 contacts →
	Partial 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 16, 2026
20	Anguil Environmental Systems, INC	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 16, 2026	51-200	140 contacts →
	Indirect evidence “Anguil Environmental provides highly-engineered, environmental equipment and service solutions that help clients solve complex industrial air and water challenges across the globe.” Source: RevenueBase Database · checked Sep 16, 2026
21	Tomorrow Water	Strong evidence	Anaheim, CA, United StatesHQ checked Sep 16, 2026	51-200	133 contacts →
	Strong evidence “Tomorrow Water is an innovative environmental solutions company specializing in both wastewater and organic waste treatment.” Source: RevenueBase Database · checked Sep 16, 2026
22	Avantech, LLC	Partial evidence	Columbia, SC, United StatesHQ checked Sep 16, 2026	51-200	117 contacts →
	Partial evidence “AVANTech, LLC is a comprehensive industrial water treatment solutions provider.” Source: RevenueBase Database · checked Sep 16, 2026
23	Merichem Caustic Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	n/a	113 contacts →
	Indirect evidence “Merichem® provides spent caustic handling services.” Source: RevenueBase Database · checked Sep 16, 2026
24	OLD Bissnuss INC	Indirect evidence	Loveland, OH, United StatesHQ checked Sep 16, 2026	11-50	111 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
25	HOH Water Technology, INC	Strong evidence	Palatine, IL, United StatesHQ checked Sep 16, 2026	51-200	110 contacts →
	Strong evidence “HOH is a leading water treatment chemical and service company, working to establish the new water technology standard at over facilities across the United States.” Source: RevenueBase Database · checked Sep 16, 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: chemical processing wastewater treatment companies. 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 chemical processing wastewater treatment companies.
Partial evidence: Its own public description names part of chemical processing wastewater treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name chemical processing wastewater treatment companies. 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 801 chemical processing wastewater treatment companies based in the United States

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Chemical processing wastewater treatment companies based in the United States at a glance

As of Sep 16, 2026

44.5%Verified-email coverage

28.9Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

300

11-50

330

51-200

119

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 801 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 chemical processing wastewater treatment companies, 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 “chemical processing wastewater treatment companies”. 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 chemical processing wastewater treatment companies), 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 chemical processing wastewater treatment companies, 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, 10,296 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 16, 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.

Chemical processing wastewater treatment companies by metro

Chemical processing wastewater treatment companies in Houston30

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 chemical processing wastewater treatment companies, 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 chemical processing wastewater treatment companies are there based in the United States?

RevenueBase identified 801 chemical processing wastewater treatment companies 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?

Solenis, headquartered in Wilmington, tops this list with the largest team on record.

Which city has the most chemical processing wastewater treatment companies?

Houston leads with 30 headquartered companies, followed by Austin (8) and Charlotte (6).

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 10,296 verified decision-maker contacts tracked across these 801 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 16, 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.