Company lists · Data refreshed September 2026

Top 25 Biological treatment system installers based in the United States

Name: Biological treatment system installers 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 269 companies tracked

RevenueBase identified 269 biological treatment system installers headquartered in the United States as of September 2026 and tracks 3,317 professional contacts across them, including 1,199 with verified work emails. Los Angeles is the largest hub.

This list covers biological treatment system installers 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 19, 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 19, 2026 86% judged on-target in blind review

269Companies

3,317Contacts tracked

1,199Verified emails

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The 25 largest biological treatment system installers based in the United States

Ranked by team size

Top 25 of 269 biological treatment system installers based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to biological treatment system installers: 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	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Partial evidence	Old Saybrook, CT, United StatesHQ checked Sep 19, 2026	501-1,000	295 contacts →
	Partial 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 19, 2026
2	Smith & Loveless INC	Strong evidence	Lenexa, KS, United StatesHQ checked Sep 19, 2026	201-500	172 contacts →
	Strong 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 19, 2026
3	Orenco Systems, INC	Indirect evidence	Sutherlin, OR, United StatesHQ checked Sep 19, 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 19, 2026
4	Tomorrow Water	Partial evidence	Anaheim, CA, United StatesHQ checked Sep 19, 2026	51-200	133 contacts →
	Partial evidence “Tomorrow Water is an innovative environmental solutions company specializing in both wastewater and organic waste treatment.” Source: RevenueBase Database · checked Sep 19, 2026
5	World Water Works, INC	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 19, 2026	51-200	97 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
6	Prochem INC	Indirect evidence	Elliston, VA, United StatesHQ checked Sep 19, 2026	51-200	95 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
7	EDI Environmental Dynamics International	Strong evidence	Columbia, MO, United StatesHQ checked Sep 19, 2026	201-500	87 contacts →
	Strong evidence “Environmental Dynamics International (EDI) specializes in the research, development and application of advanced technology aeration and biological treatment solutions.” Source: RevenueBase Database · checked Sep 19, 2026
8	Integrated Water Services	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “We make water better.” Source: RevenueBase Database · checked Sep 19, 2026
9	Clean Water Technology	Indirect evidence	Gardena, CA, United StatesHQ checked Sep 19, 2026	51-200	83 contacts →
	Indirect evidence “Did you know you can remove up to 98% of contaminants from industrial wastewater while shrinking your chemical spend and footprint?” Source: RevenueBase Database · checked Sep 19, 2026
10	Water & Wastewater Equipment Company	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 19, 2026	11-50	80 contacts →
	Partial evidence “Water and Wastewater Equipment Company has been providing efficient, cost-effective and compliant solutions to water and wastewater treatment applications for over 30 years.” Source: RevenueBase Database · checked Sep 19, 2026
11	The Probst Group	Indirect evidence	Hartland, WI, United StatesHQ checked Sep 19, 2026	51-200	59 contacts →
	Indirect evidence “The Probst Group, LLC (TPG) is an engineering firm specializing in industrial wastewater management.” Source: RevenueBase Database · checked Sep 19, 2026
12	Clear Creek Systems	Strong evidence	Bakersfield, CA, United StatesHQ checked Sep 19, 2026	51-200	54 contacts →
	Strong evidence “Clear Creek Systems is a leading provider of water treatment systems and services.” Source: RevenueBase Database · checked Sep 19, 2026
13	Biofiltro	Indirect evidence	Davis, CA, United StatesHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “We believe in a world where business, people, and the planet thrive.” Source: RevenueBase Database · checked Sep 19, 2026
14	Bioair Solutions, LLC	Partial evidence	Voorhees, NJ, United StatesHQ checked Sep 19, 2026	51-200	46 contacts →
	Partial evidence “BioAir Solutions, LLC is the leading provider worldwide of biological odor and air emission control solutions for municipalities and industry.” Source: RevenueBase Database · checked Sep 19, 2026
15	Headworks International	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	45 contacts →
	Indirect evidence “Every day, Headworks International devotes its considerable resources to meet the world’s demand for our most precious resource: clean water.” Source: RevenueBase Database · checked Sep 19, 2026
16	Orion Water Solutions	Partial evidence	Austin, United StatesHQ checked Sep 19, 2026	51-200	42 contacts →
	Partial evidence “ORION Water Solutions is composed of a group of industry proven water treatment engineers, automation experts, field operators, and technicians who have treated over 1 billion…” Source: RevenueBase Database · checked Sep 19, 2026
17	Proact Services Corporation	Strong evidence	Ludington, MI, United StatesHQ checked Sep 19, 2026	51-200	42 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
18	ANUA	Indirect evidence	Greensboro, NC, United StatesHQ checked Sep 19, 2026	11-50	32 contacts →
	Indirect evidence “Anua is an American company that provides sustainable Clean Water and Clean Air solutions for the Western Hemisphere.” Source: RevenueBase Database · checked Sep 19, 2026
19	Clearstream Environmental, INC	Partial evidence	Sandy, UT, United StatesHQ checked Sep 19, 2026	11-50	31 contacts →
	Partial evidence “ClearStream Environmental engineers high-performance water and wastewater treatment solutions for municipal and industrial applications.” Source: RevenueBase Database · checked Sep 19, 2026
20	Triplepoint Environmental	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 19, 2026	11-50	29 contacts →
	Indirect evidence “At Triplepoint Environmental, we believe lagoons do it better.” Source: RevenueBase Database · checked Sep 19, 2026
21	Municipal Maintenance CO	Partial evidence	Cinnaminson Township, NJ, United StatesHQ checked Sep 19, 2026	51-200	29 contacts →
	Partial evidence “Municipal Maintenance Company is the region's leader in service, sales, and installation of water and wastewater treatment equipment.” Source: RevenueBase Database · checked Sep 19, 2026
22	Biomicrobics, Inc.	Strong evidence	Lenexa, KS, United StatesHQ checked Sep 19, 2026	51-200	29 contacts →
	Strong evidence “Water \| Wastewater \| Greywater \| Stormwater BioMicrobics, SeptiTech, and Scienco/FAST manufacture integrated, sustainable, water utilization treatment systems land and sea.” Source: RevenueBase Database · checked Sep 19, 2026
23	Wastech Controls And Engineering	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	11-50	27 contacts →
	Partial evidence “We are the premier manufacturer of fully-automated, skid-mounted pH Adjustment Systems, Pump Lift Stations, Chemical Collection Cabinets, Solvent Collection Cabinets, Heavy Metal…” Source: RevenueBase Database · checked Sep 19, 2026
24	Hydro Solutions, INC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 19, 2026	11-50	26 contacts →
	Indirect evidence “Hydro Solutions, Inc, a multi-million dollar company, was founded in 1993 to focus on developing a nationwide business which specializes in providing engineered solutions for…” Source: RevenueBase Database · checked Sep 19, 2026
25	Aquafix, INC	Indirect evidence	Madison, WI, United StatesHQ checked Sep 19, 2026	11-50	26 contacts →
	Indirect evidence “In Aquafix started with the goal of developing great bio-technologies to the people who work in the wastewater industry.” Source: RevenueBase Database · checked Sep 19, 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: biological treatment system installers. 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 biological treatment system installers.
Partial evidence: Its own public description names part of biological treatment system installers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biological treatment system installers. 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 269 biological treatment system installers based in the United States

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Biological treatment system installers based in the United States at a glance

As of Sep 19, 2026

36.1%Verified-email coverage

12.3Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Los Angeles

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

115

11-50

112

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 269 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 biological treatment system installers, 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 “biological treatment system installers”. 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 biological treatment system installers), 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 biological treatment system installers, 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, 1,199 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 19, 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.

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 biological treatment system installers, 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 biological treatment system installers are there based in the United States?

RevenueBase identified 269 biological treatment system installers 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?

Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions, headquartered in Old Saybrook, tops this list with the largest team on record.

Which city has the most biological treatment system installers?

Los Angeles leads with 5 headquartered companies, followed by Charlotte (4) and Cleveland (4).

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 1,199 verified decision-maker contacts tracked across these 269 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 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 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.