Company lists · Data refreshed September 2026

Top 25 Sewage treatment plant construction companies based in the United States

Name: Sewage treatment plant construction companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 742 companies tracked

RevenueBase identified 742 sewage treatment plant construction companies headquartered in the United States as of September 2026 and tracks 16,996 professional contacts across them, including 6,507 with verified work emails. Houston is the largest hub.

This list covers sewage treatment plant construction companies 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 16, 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 16, 2026 86% judged on-target in blind review

742Companies

16,996Contacts tracked

6,507Verified emails

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The 25 largest sewage treatment plant construction companies based in the United States

Ranked by team size

Top 25 of 742 sewage treatment plant construction companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to sewage treatment plant construction companies: 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	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,473 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
2	Carollo Engineers	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,718 contacts →
	Indirect evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 16, 2026
3	Westech Engineering	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 16, 2026	501-1,000	554 contacts →
	Partial evidence “WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
4	UCC Environmental	Partial evidence	Waukegan, IL, United StatesHQ checked Sep 16, 2026	201-500	389 contacts →
	Partial evidence “UCC Environmental (UCC) is a global leader in environmental solutions for solids handling, wastewater treatment and pollution control technologies in power generation and other…” Source: RevenueBase Database · checked Sep 16, 2026
5	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Partial evidence	Old Saybrook, CT, United StatesHQ checked Sep 16, 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 16, 2026
6	Huber Technology US	Indirect evidence	Denver, NC, United StatesHQ checked Sep 16, 2026	201-500	243 contacts →
	Indirect evidence “HUBER Technology, LLC, the U.S.” Source: RevenueBase Database · checked Sep 16, 2026
7	Usabluebook	Indirect evidence	Waukegan, IL, United StatesHQ checked Sep 16, 2026	5,001-10,000	241 contacts →
	Indirect evidence “Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.” Source: RevenueBase Database · checked Sep 16, 2026
8	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 16, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
9	Fluence Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	201-500	195 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
10	Newterra	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 16, 2026	201-500	185 contacts →
	Partial evidence “Newterra designs, engineers, manufactures, and services environmental, water and wastewater treatment solutions that assure great performance, superb reliability, and the highest…” Source: RevenueBase Database · checked Sep 16, 2026
11	Felix Construction Company	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 16, 2026	201-500	178 contacts →
	Partial evidence “Felix Construction Company is a general engineering contractor and construction management company with a specific focus on: Water production facilities, well sites, booster pump…” Source: RevenueBase Database · checked Sep 16, 2026
12	Smith & Loveless INC	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 16, 2026	201-500	172 contacts →
	Partial 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 16, 2026
13	Orenco Systems, INC	Indirect evidence	Sutherlin, OR, United StatesHQ checked Sep 16, 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 16, 2026
14	National Water Main Cleaning Company	Indirect evidence	Kearny, NJ, United StatesHQ checked Sep 16, 2026	51-200	150 contacts →
	Indirect evidence “National Water Main Cleaning Co.” Source: RevenueBase Database · checked Sep 16, 2026
15	Sovereign Consulting INC	Partial evidence	Robbinsville, NJ, United StatesHQ checked Sep 16, 2026	51-200	145 contacts →
	Partial evidence “Founded in Sovereign is an environmental and water and wastewater construction firm with offices throughout the country.” Source: RevenueBase Database · checked Sep 16, 2026
16	Water Works Engineers	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 16, 2026	51-200	135 contacts →
	Indirect evidence “Water Works Engineers is a leading civil and environmental engineering firm specializing in innovative and sustainable solutions for water infrastructure projects across the…” Source: RevenueBase Database · checked Sep 16, 2026
17	Tomorrow Water	Partial evidence	Anaheim, CA, United StatesHQ checked Sep 16, 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 16, 2026
18	Rice Lake Construction Group	Partial evidence	Deerwood, MN, United StatesHQ checked Sep 16, 2026	201-500	125 contacts →
	Partial evidence “At Rice Lake Construction Group, we know water.” Source: RevenueBase Database · checked Sep 16, 2026
19	Filanc	Indirect evidence	Escondido, CA, United StatesHQ checked Sep 16, 2026	201-500	122 contacts →
	Indirect evidence “Headquartered in Escondido, California, Filanc is an award-winning, general engineering and design-build contractor that solely constructs, renovates, and expands water and…” Source: RevenueBase Database · checked Sep 16, 2026
20	ACE Pipe Cleaning INC	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 16, 2026	1,001-5,000	116 contacts →
	Indirect evidence “Ace Pipe Cleaning, Inc, headquartered in Kansas City, Missouri, is part of a nationwide network of 14 Carylon Corporation companies.” Source: RevenueBase Database · checked Sep 16, 2026
21	GSE Construction Company, INC	Partial evidence	Livermore, CA, United StatesHQ checked Sep 16, 2026	201-500	112 contacts →
	Partial evidence “Over the past 45 years, GSE Construction has completed more than projects as a general engineering contractor.” Source: RevenueBase Database · checked Sep 16, 2026
22	Wessler Engineering	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 16, 2026	51-200	109 contacts →
	Indirect evidence “Wessler Engineering is a civil and environmental engineering firm, specializing in wastewater, drinking water, and stormwater projects, providing services ranging from master…” Source: RevenueBase Database · checked Sep 16, 2026
23	Skelly And Loy, Inc., A Terracon Company	Indirect evidence	Harrisburg, PA, United StatesHQ checked Sep 16, 2026	51-200	108 contacts →
	Indirect evidence “Established in 1969, Skelly and Loy is a privately owned, mid-sized corporation with 6 Mid-Atlantic offices.” Source: RevenueBase Database · checked Sep 16, 2026
24	Ground Water Treatment & Technology, LLC	Indirect evidence	Wharton, NJ, United StatesHQ checked Sep 16, 2026	51-200	106 contacts →
	Indirect evidence “GWTT is one of the only U.S.” Source: RevenueBase Database · checked Sep 16, 2026
25	World Water Works, INC	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 16, 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 16, 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: sewage treatment plant construction companies. 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 sewage treatment plant construction companies.
Partial evidence: Its own public description names part of sewage treatment plant construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sewage treatment plant construction companies. 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 742 sewage treatment plant construction companies based in the United States

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Sewage treatment plant construction companies based in the United States at a glance

As of Sep 16, 2026

38.3%Verified-email coverage

22.9Average contacts per company

11-50Median size (employees)

2.7%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

270

11-50

290

51-200

132

201-500

501-1,000

1,001-5,000

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 742 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 sewage treatment plant construction companies, 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 “sewage treatment plant construction companies”. 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 sewage treatment plant construction companies), 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 sewage treatment plant construction companies, 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, 6,507 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 16, 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 sewage treatment plant construction companies, 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 sewage treatment plant construction companies are there based in the United States?

RevenueBase identified 742 sewage treatment plant construction companies 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?

Brown And Caldwell, headquartered in Walnut Creek, tops this list with the largest team on record.

Which city has the most sewage treatment plant construction companies?

Houston leads with 20 headquartered companies, followed by Austin (8) and Atlanta (7).

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 6,507 verified decision-maker contacts tracked across these 742 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 16, 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.