Company lists · Data refreshed September 2026

Top 25 Wastewater management companies based in the United States

RevenueBase identified 1,958 company matches for wastewater management companies associated with the United States as of September 2026 and tracks 73,155 professional contacts across them, including 30,693 with verified work emails. Houston is the largest hub.

This list covers company matches for wastewater management companies 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 22, 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 22, 2026 How this list was built
1,958Companies
73,155Contacts tracked
30,693Verified emails
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The 25 largest wastewater management companies based in the United States

Ranked by team size
Top 25 of 1,958 company matches for wastewater management companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchPasadena, CA, United StatesHQ recorded Sep 22, 202610001+12,999 contacts →

Exact match

“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202610001+9,320 contacts →

Exact match

“Xylem is the global leader in advanced technologies, solutions and services that address the world’s biggest water challenges.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 22, 20261,001-5,0002,473 contacts →

Exact match

“Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Sep 22, 20261,001-5,0002,100 contacts →

Exact match

“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
6Exact matchLongwood, United StatesHQ recorded Sep 22, 20261,001-5,0001,560 contacts →

Exact match

“Waste Pro USA, Inc.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchCincinnati, OH, United StatesHQ recorded Sep 22, 20261,001-5,0001,360 contacts →

Exact match

“Rumpke Waste and Recycling has been committed to keeping neighborhoods and businesses clean and green since 1932 by providing environmentally friendly waste disposal and recycling…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchKing Of Prussia, PA, United StatesHQ recorded Sep 22, 20261,001-5,0001,275 contacts →

Exact match

“Veolia has completed the acquisition of Clean Earth, bringing together two organizations with a shared commitment to environmental stewardship, safety and operational excellence.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchHorsham, PA, United StatesHQ recorded Sep 22, 20261,001-5,000973 contacts →

Exact match

“As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchWoburn, MA, United StatesHQ recorded Sep 22, 20261,001-5,000813 contacts →

Exact match

“Gradiant is a Different Kind of Water Company.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Sep 22, 20261,001-5,000481 contacts →

Exact match

“At VLS, we address your company’s most significant hurdles with waste management and compliance through sustainable solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchIrving, TX, United StatesHQ recorded Sep 22, 2026501-1,000427 contacts →

Exact match

“Liquid Environmental Solutions - the largest, exclusively non-hazardous US wastewater collection and disposal company, is known for innovation and leadership in protecting…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchWaukegan, IL, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
15Exact matchCrystal Lake, IL, United StatesHQ recorded Sep 22, 2026201-500385 contacts →

Exact match

“Founded in 1946, Baxter & Woodman, Inc.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchWylie, TX, United StatesHQ recorded Sep 22, 2026501-1,000369 contacts →

Exact match

“About Us: The North Texas Municipal Water District (NTMWD) is a regional provider of water, wastewater and solid waste disposal services.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchLiverpool, NY, United StatesHQ recorded Sep 22, 2026201-500355 contacts →

Exact match

“Barton & Loguidice is a multidisciplinary consulting firm providing technical services to public and private clients.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchGrand Forks, ND, United StatesHQ recorded Sep 22, 2026201-500339 contacts →

Exact match

“AE2S is a specialized civil/environmental consulting engineering firm that provides professional services and our unique brand of extreme client service to clients in the upper…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchFort Lauderdale, FL, United StatesHQ recorded Sep 22, 202651-200317 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 22, 2026 · View company records in RevenueBase
20Exact matchOld Saybrook, CT, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
21Exact matchHershey, PA, United StatesHQ recorded Sep 22, 2026501-1,000268 contacts →

Exact match

“Keystone Clearwater Solutions is moving water forward with engineered solutions for safer, more efficient water transfer, water management, and environmental services.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Sep 22, 2026201-500263 contacts →

Exact match

“Ironclad Environmental Solutions is the leading provider of custom waste management solutions, supported by the largest national fleet of innovative, top-quality specialty assets.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchMonroe, OH, United StatesHQ recorded Sep 22, 2026201-500254 contacts →

Exact match

“Valicor is a trusted partner for sustainable waste management solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchIrving, TX, United StatesHQ recorded Sep 22, 20261,001-5,000251 contacts →

Exact match

“Chemsearch FE’s mission is simple-to help facilities save water, energy and reduce operating costs.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchAuburn Hills, MI, United StatesHQ recorded Sep 22, 2026501-1,000248 contacts →

Exact match

“For 36 years, Mersino has been trusted with the most complex water management challenges in the country.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 1,958 wastewater management companies based in the United States

See the full list, filter by size, metro and specialty, and access 30,693 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Wastewater management companies based in the United States at a glance

As of Sep 22, 2026
42.0%Verified-email coverage
37.4Average contacts per company
11-50Median size (employees)
3.0%Largest-city concentration · Houston
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
746
11-50
756
51-200
313
201-500
89
501-1,000
18
1,001-5,000
18
5,001-10,000
5
10001+
7

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 1,958 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 “wastewater management companies” 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 30,693 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 22, 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 “wastewater management companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many wastewater management companies are there based in the United States?

RevenueBase identified 1,958 company matches for wastewater management companies 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?

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

Which city has the most wastewater management companies?

Houston leads with 59 company records, followed by Phoenix (16) and Austin (13).

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 30,693 professional contacts with verified work emails tracked across these 1,958 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 22, 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.