Company lists · Data refreshed September 2026

Top 25 Wastewater treatment plant contractors based in the United States

RevenueBase identified 1,078 company matches for wastewater treatment plant contractors associated with the United States as of September 2026 and tracks 48,035 professional contacts across them, including 18,907 with verified work emails. Houston is the largest hub.

This list covers company matches for wastewater treatment plant 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 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
1,078Companies
48,035Contacts tracked
18,907Verified emails
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The 25 largest wastewater treatment plant contractors based in the United States

Ranked by team size
Top 25 of 1,078 company matches for wastewater treatment plant contractors 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPasadena, CA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
2Exact matchBoston, MA, United StatesHQ recorded Sep 19, 20265,001-10,0007,527 contacts →

Exact match

“CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
4Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
5Exact matchPortland, ME, United StatesHQ recorded Sep 19, 20261,001-5,0001,060 contacts →

Exact match

“Woodard & Curran is more than just a consulting firm – we are an employee-owned integrated science, engineering, design-build, and operations company specializing in water and…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchNorth Kansas City, MO, United StatesHQ recorded Sep 19, 20261,001-5,0001,009 contacts →

Exact match

“Garney Construction is a national leader in water and wastewater construction.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchHorsham, PA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
8Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
9Exact matchBroomfield, CO, United StatesHQ recorded Sep 19, 2026501-1,000428 contacts →

Exact match

“As a leading U.S.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchWaukegan, IL, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
11Exact matchFort Lauderdale, FL, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
12Exact matchOld Saybrook, CT, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
13Exact matchDenver, NC, United StatesHQ recorded Sep 19, 2026201-500243 contacts →

Exact match

“HUBER Technology, LLC, the U.S.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchWaukegan, IL, United StatesHQ recorded Sep 19, 20265,001-10,000241 contacts →

Exact match

“Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchLoves Park, IL, United StatesHQ recorded Sep 19, 202651-200207 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchMiamisburg, OH, United StatesHQ recorded Sep 19, 2026501-1,000196 contacts →

Exact match

“Ulliman Schutte is a national leader in providing water infrastructure in the United States.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchMinneapolis, MN, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
18Exact matchCoraopolis, PA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
19Exact matchPhoenix, AZ, United StatesHQ recorded Sep 19, 2026201-500178 contacts →

Exact match

“Felix Construction Company is a general engineering contractor and construction management company with a specific focus on: Water production facilities, well sites, booster pump…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchLenexa, KS, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
21Exact matchSutherlin, OR, United StatesHQ recorded Sep 19, 2026201-500170 contacts →

Exact match

“Nobody wants to worry about whether their wastewater is contaminating nearby rivers, streams, and wells.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchSelinsgrove, PA, United StatesHQ recorded Sep 19, 2026201-500147 contacts →

Exact match

“100% Employee Owned LB Water has been providing quality water and wastewater solutions for decades.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchRobbinsville, NJ, United StatesHQ recorded Sep 19, 202651-200145 contacts →

Exact match

“Founded in Sovereign is an environmental and water and wastewater construction firm with offices throughout the country.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchSmyrna, GA, United StatesHQ recorded Sep 19, 2026201-500139 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchBothell, WA, United StatesHQ recorded Sep 19, 202651-200136 contacts →

Exact match

“RH2 is an innovative, full-service engineering firm specializing in water and wastewater related projects.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 1,078 wastewater treatment plant contractors based in the United States

See the full list, filter by size, metro and specialty, and access 18,907 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Wastewater treatment plant contractors based in the United States at a glance

As of Sep 19, 2026
39.4%Verified-email coverage
44.6Average contacts per company
11-50Median size (employees)
2.4%Largest-city concentration · Houston
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
395
11-50
421
51-200
192
201-500
37
501-1,000
11
1,001-5,000
11
5,001-10,000
5
10001+
3

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 1,078 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 treatment plant 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 18,907 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 “wastewater treatment plant contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many wastewater treatment plant contractors are there based in the United States?

RevenueBase identified 1,078 company matches for wastewater treatment plant 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?

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 treatment plant contractors?

Houston leads with 26 company records, followed by Phoenix (12) and Austin (10).

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 18,907 professional contacts with verified work emails tracked across these 1,078 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.