Company lists · Data refreshed September 2026

Top 25 Activated sludge system contractors based in the United States

RevenueBase identified 572 company matches for activated sludge system contractors associated with the United States as of September 2026 and tracks 10,999 professional contacts across them, including 5,203 with verified work emails. Houston is the largest hub.

This list covers company matches for activated sludge 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 30, 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 30, 2026 How this list was built
572Companies
10,999Contacts tracked
5,203Verified emails
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The 25 largest activated sludge system contractors based in the United States

Ranked by team size
Top 25 of 572 company matches for activated sludge system contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 30, 20261,001-5,0001,718 contacts →

Exact match

“For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
2Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 30, 2026501-1,000554 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 30, 2026 · View company records in RevenueBase
3Exact matchWaukegan, IL, United StatesHQ recorded Sep 30, 2026201-500389 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 30, 2026 · View company records in RevenueBase
4Exact matchOld Saybrook, CT, United StatesHQ recorded Sep 30, 2026501-1,000295 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 30, 2026 · View company records in RevenueBase
5Exact matchDenver, NC, United StatesHQ recorded Sep 30, 2026201-500243 contacts →

Exact match

“HUBER Technology, LLC, the U.S.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6Exact matchLoves Park, IL, United StatesHQ recorded Sep 30, 202651-200207 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
7Exact matchMinneapolis, MN, United StatesHQ recorded Sep 30, 2026201-500195 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 30, 2026 · View company records in RevenueBase
8Exact matchCoraopolis, PA, United StatesHQ recorded Sep 30, 2026201-500185 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 30, 2026 · View company records in RevenueBase
9Exact matchLenexa, KS, United StatesHQ recorded Sep 30, 2026201-500172 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 30, 2026 · View company records in RevenueBase
10Exact matchKearny, NJ, United StatesHQ recorded Sep 30, 202651-200150 contacts →

Exact match

“National Water Main Cleaning Co.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11Exact matchAnaheim, CA, United StatesHQ recorded Sep 30, 202651-200133 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 30, 2026 · View company records in RevenueBase
12Exact matchEscondido, CA, United StatesHQ recorded Sep 30, 2026201-500122 contacts →

Exact match

“Headquartered in Escondido, California, Filanc is an award-winning, general engineering and design-build contractor that solely constructs, renovates, and expands water and…”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13Exact matchColumbia, SC, United StatesHQ recorded Sep 30, 202651-200117 contacts →

Exact match

“AVANTech, LLC is a comprehensive industrial water treatment solutions provider.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14Exact matchKansas City, MO, United StatesHQ recorded Sep 30, 20261,001-5,000116 contacts →

Exact match

“Ace Pipe Cleaning, Inc, headquartered in Kansas City, Missouri, is part of a nationwide network of 14 Carylon Corporation companies.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15Exact matchLivermore, CA, United StatesHQ recorded Sep 30, 2026201-500112 contacts →

Exact match

“Over the past 45 years, GSE Construction has completed more than projects as a general engineering contractor.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16Exact matchGlen Allen, VA, United StatesHQ recorded Sep 30, 202651-200110 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 30, 2026 · View company records in RevenueBase
17Exact matchWharton, NJ, United StatesHQ recorded Sep 30, 202651-200106 contacts →

Exact match

“GWTT is one of the only U.S.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18Exact matchOklahoma City, OK, United StatesHQ recorded Sep 30, 202651-20097 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 30, 2026 · View company records in RevenueBase
19Exact matchElliston, VA, United StatesHQ recorded Sep 30, 202651-20095 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20Exact matchColumbia, MO, United StatesHQ recorded Sep 30, 2026201-50087 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 30, 2026 · View company records in RevenueBase
21Exact matchCharlotte, NC, United StatesHQ recorded Sep 30, 202651-20086 contacts →

Exact match

“Founded in 1962, Jim Myers & Sons, Inc.(JMS) is a high-quality equipment manufacturer leading the way in the water & wastewater industry.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22Exact matchAustin, TX, United StatesHQ recorded Sep 30, 202651-20086 contacts →

Exact match

“We make water better.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23Exact matchGardena, CA, United StatesHQ recorded Sep 30, 202651-20083 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 30, 2026 · View company records in RevenueBase
24Exact matchCleveland, OH, United StatesHQ recorded Sep 30, 202611-5080 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 30, 2026 · View company records in RevenueBase
25Exact matchWilder, KY, United StatesHQ recorded Sep 30, 202651-20076 contacts →

Exact match

“Building Crafts, Inc.(BCI) specializes as a general contractor primarily in the Design and Installation of industrial and municipal water and wastewater treatment plants.”

Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase

Showing 25 of 572 activated sludge system contractors based in the United States

See the full list, filter by size, metro and specialty, and access 5,203 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Activated sludge system contractors based in the United States at a glance

As of Sep 30, 2026
47.3%Verified-email coverage
19.2Average contacts per company
11-50Median size (employees)
2.4%Largest-city concentration · Houston
Sep 30, 2026Page data refreshed

Companies by employee count

1-10
202
11-50
232
51-200
102
201-500
25
501-1,000
2
1,001-5,000
4
5,001-10,000
2
10001+
2

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 572 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 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 5,203 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 30, 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 system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many activated sludge system contractors are there based in the United States?

RevenueBase identified 572 company matches for activated sludge 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?

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

Which city has the most activated sludge system contractors?

Houston leads with 14 company records, followed by Austin (7) and Miami (7).

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 5,203 professional contacts with verified work emails tracked across these 572 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 30, 2026.

Ready to reach these companies? Verified emails and direct dials for all 572 activated sludge system contractors based in the United States. Start with a free account, no credit card.

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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.