Company lists · Data refreshed September 2026

Top 25 Activated sludge treatment providers based in the United States

Name: Activated sludge treatment providers 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 279 companies tracked

RevenueBase identified 279 company matches for activated sludge treatment providers associated with the United States as of September 2026 and tracks 4,344 professional contacts across them, including 1,847 with verified work emails. Charlotte is the largest hub.

This list covers company matches for activated sludge treatment providers 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 19, 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 19, 2026 How this list was built

279Companies

4,344Contacts tracked

1,847Verified emails

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The 25 largest activated sludge treatment providers based in the United States

Ranked by team size

Top 25 of 279 company matches for activated sludge treatment providers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Westech Engineering	Exact match	Salt Lake City, UT, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
2	Huber Technology US	Exact match	Denver, NC, United StatesHQ recorded Sep 19, 2026	201-500	243 contacts →
	Exact match “HUBER Technology, LLC, the U.S.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Aqua-Aerobic Systems, INC	Exact match	Loves Park, IL, United StatesHQ recorded Sep 19, 2026	51-200	207 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Fluence Corporation	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
5	Newterra	Exact match	Coraopolis, PA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
6	Smith & Loveless INC	Exact match	Lenexa, KS, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
7	Tomorrow Water	Exact match	Anaheim, CA, United StatesHQ recorded Sep 19, 2026	51-200	133 contacts →
	Exact match “Tomorrow Water is an innovative environmental solutions company specializing in both wastewater and organic waste treatment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	USP Technologies	Exact match	Glen Allen, VA, United StatesHQ recorded Sep 19, 2026	51-200	110 contacts →
	Exact match “USP Technologies provides performance-driven, full-service environmental treatment programs to help purify water, wastewater, soil and air.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	World Water Works, INC	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 19, 2026	51-200	97 contacts →
	Exact match “At World Water Works, we strive to provide industrial and municipal customers with proven and cost-effective wastewater treatment solutions that deliver superior effluent quality.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Prochem INC	Exact match	Elliston, VA, United StatesHQ recorded Sep 19, 2026	51-200	95 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	EDI Environmental Dynamics International	Exact match	Columbia, MO, United StatesHQ recorded Sep 19, 2026	201-500	87 contacts →
	Exact match “Environmental Dynamics International (EDI) specializes in the research, development and application of advanced technology aeration and biological treatment solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Integrated Water Services	Exact match	Austin, TX, United StatesHQ recorded Sep 19, 2026	51-200	86 contacts →
	Exact match “We make water better.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Clean Water Technology	Exact match	Gardena, CA, United StatesHQ recorded Sep 19, 2026	51-200	83 contacts →
	Exact match “Did you know you can remove up to 98% of contaminants from industrial wastewater while shrinking your chemical spend and footprint?” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Water & Wastewater Equipment Company	Exact match	Cleveland, OH, United StatesHQ recorded Sep 19, 2026	11-50	80 contacts →
	Exact match “Water and Wastewater Equipment Company has been providing efficient, cost-effective and compliant solutions to water and wastewater treatment applications for over 30 years.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	The Probst Group	Exact match	Hartland, WI, United StatesHQ recorded Sep 19, 2026	51-200	59 contacts →
	Exact match “The Probst Group, LLC (TPG) is an engineering firm specializing in industrial wastewater management.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	TSG Water Resources, INC	Exact match	Gainesville, FL, United StatesHQ recorded Sep 19, 2026	11-50	49 contacts →
	Exact match “We Design, Manufacture & Operate Water and Wastewater Treatment Plants.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Watersurplus	Exact match	Loves Park, IL, United StatesHQ recorded Sep 19, 2026	51-200	45 contacts →
	Exact match “WaterSurplus is a leader in sustainable water treatment, delivering high-performance solutions across industries.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Monroe Environmental Corp	Exact match	Monroe, MI, United StatesHQ recorded Sep 19, 2026	51-200	45 contacts →
	Exact match “Monroe Environmental is a premier provider of water/wastewater treatment and air pollution control systems and services in the United States and throughout the world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Headworks International	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	45 contacts →
	Exact match “Every day, Headworks International devotes its considerable resources to meet the world’s demand for our most precious resource: clean water.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Proact Services Corporation	Exact match	Ludington, MI, United StatesHQ recorded Sep 19, 2026	51-200	42 contacts →
	Exact match “The Leading Manufacturer of Reliable Rental, New and Used, Environmental Remediation Treatment Systems and Services to Consultants and their Clients and… The National Leader in…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Cambrian	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	37 contacts →
	Exact match “At Cambrian our vision is simple: industry is an ecosystem.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Coastal Process, LLC	Exact match	Holden, LA, United StatesHQ recorded Sep 19, 2026	11-50	34 contacts →
	Exact match “Coastal Process was established in 2005 as a supplier of water, wastewater, and compressed air equipment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Clearstream Environmental, INC	Exact match	Sandy, UT, United StatesHQ recorded Sep 19, 2026	11-50	31 contacts →
	Exact match “ClearStream Environmental engineers high-performance water and wastewater treatment solutions for municipal and industrial applications.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Practical Applications, INC	Exact match	Woburn, MA, United StatesHQ recorded Sep 19, 2026	11-50	30 contacts →
	Exact match “Practical Applications Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Eosi Environmental Operating Solutions, INC	Exact match	Pocasset, MA, United StatesHQ recorded Sep 19, 2026	11-50	29 contacts →
	Exact match “Since 2003, Environmental Operating Solutions, Inc.(EOSi) has been committed to “Empowering Clean Water” and has led the industry in helping its customers to comply with…” Recorded in the RevenueBase company graph · Sep 19, 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 “activated sludge treatment providers”. 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 279 activated sludge treatment providers based in the United States

See the full list, filter by size, metro and specialty, and access 1,847 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Activated sludge treatment providers based in the United States at a glance

As of Sep 19, 2026

42.5%Verified-email coverage

15.6Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · Charlotte

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

116

11-50

113

51-200

201-500

501-1,000

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 279 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 “activated sludge treatment providers” 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 1,847 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 19, 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 “activated sludge treatment providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many activated sludge treatment providers are there based in the United States?

RevenueBase identified 279 company matches for activated sludge treatment providers 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?

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

Which city has the most activated sludge treatment providers?

Charlotte leads with 4 company records, followed by Cleveland (4) and Houston (4).

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 1,847 professional contacts with verified work emails tracked across these 279 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 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 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.