Company lists · Data refreshed September 2026

Top 25 Sanitation system design companies based in the United States

Name: Sanitation system design 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 22, 2026 676 companies tracked

RevenueBase identified 676 sanitation system design companies headquartered in the United States as of September 2026 and tracks 15,726 professional contacts across them, including 6,143 with verified work emails. Houston is the largest hub.

This list covers sanitation system design 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 22, 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 22, 2026 86% judged on-target in blind review

676Companies

15,726Contacts tracked

6,143Verified emails

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The 25 largest sanitation system design companies based in the United States

Ranked by team size

Top 25 of 676 sanitation system design companies based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sanitation system design 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 22, 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 22, 2026
2	Carollo Engineers	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 22, 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 22, 2026
3	Westech Engineering	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 22, 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 22, 2026
4	UCC Environmental	Indirect evidence	Waukegan, IL, United StatesHQ checked Sep 22, 2026	201-500	389 contacts →
	Indirect 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 22, 2026
5	Baxter & Woodman	Indirect evidence	Crystal Lake, IL, United StatesHQ checked Sep 22, 2026	201-500	385 contacts →
	Indirect evidence “Founded in 1946, Baxter & Woodman, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
6	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Indirect evidence	Old Saybrook, CT, United StatesHQ checked Sep 22, 2026	501-1,000	295 contacts →
	Indirect 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 22, 2026
7	Huber Technology US	Indirect evidence	Denver, NC, United StatesHQ checked Sep 22, 2026	201-500	243 contacts →
	Indirect evidence “HUBER Technology, LLC, the U.S.” Source: RevenueBase Database · checked Sep 22, 2026
8	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 22, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
9	Fluence Corporation	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 22, 2026	201-500	195 contacts →
	Indirect 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 22, 2026
10	Newterra	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 22, 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 22, 2026
11	Smith & Loveless INC	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 22, 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 22, 2026
12	Orenco Systems, INC	Indirect evidence	Sutherlin, OR, United StatesHQ checked Sep 22, 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 22, 2026
13	Aqualis	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 22, 2026	501-1,000	136 contacts →
	Indirect evidence “AQUALIS is the national leader in water management, compliance and engineering, helping businesses meet complex water regulations while protecting long-term infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
14	Reynolds Construction, LLC	Indirect evidence	Orleans, IN, United StatesHQ checked Sep 22, 2026	201-500	136 contacts →
	Indirect evidence “Reynolds Construction, LLC, is an employee owned, customer focused, performance driven, service company providing sustainable solutions to the water, wastewater, and renewable…” Source: RevenueBase Database · checked Sep 22, 2026
15	Water Works Engineers	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 22, 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 22, 2026
16	Tomorrow Water	Indirect evidence	Anaheim, CA, United StatesHQ checked Sep 22, 2026	51-200	133 contacts →
	Indirect evidence “Tomorrow Water is an innovative environmental solutions company specializing in both wastewater and organic waste treatment.” Source: RevenueBase Database · checked Sep 22, 2026
17	Rice Lake Construction Group	Indirect evidence	Deerwood, MN, United StatesHQ checked Sep 22, 2026	201-500	125 contacts →
	Indirect evidence “At Rice Lake Construction Group, we know water.” Source: RevenueBase Database · checked Sep 22, 2026
18	Filanc	Partial evidence	Escondido, CA, United StatesHQ checked Sep 22, 2026	201-500	122 contacts →
	Partial 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 22, 2026
19	GSE Construction Company, INC	Indirect evidence	Livermore, CA, United StatesHQ checked Sep 22, 2026	201-500	112 contacts →
	Indirect evidence “Over the past 45 years, GSE Construction has completed more than projects as a general engineering contractor.” Source: RevenueBase Database · checked Sep 22, 2026
20	World Water Works, INC	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 22, 2026	51-200	97 contacts →
	Indirect 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 22, 2026
21	Northwest Cascade INC	Indirect evidence	Puyallup, WA, United StatesHQ checked Sep 22, 2026	201-500	97 contacts →
	Indirect evidence “Northwest Cascade is a growing company with a variety of related businesses that serve construction and environmental needs.” Source: RevenueBase Database · checked Sep 22, 2026
22	Prochem INC	Indirect evidence	Elliston, VA, United StatesHQ checked Sep 22, 2026	51-200	95 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
23	JIM Myers & Sons, Inc. JMS	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 22, 2026	51-200	86 contacts →
	Indirect evidence “Founded in 1962, Jim Myers & Sons, Inc.(JMS) is a high-quality equipment manufacturer leading the way in the water & wastewater industry.” Source: RevenueBase Database · checked Sep 22, 2026
24	Integrated Water Services	Indirect evidence	Austin, TX, United StatesHQ checked Sep 22, 2026	51-200	86 contacts →
	Indirect evidence “We make water better.” Source: RevenueBase Database · checked Sep 22, 2026
25	HYDRO	Strong evidence	Durham, NC, United StatesHQ checked Sep 22, 2026	51-200	86 contacts →
	Strong evidence “We Design, Build, Install, Start Up, and Validate High-Purity Water Systems-Improving Lives Through Water Purification.” Source: RevenueBase Database · checked Sep 22, 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: sanitation system design 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 sanitation system design companies.
Partial evidence: Its own public description names part of sanitation system design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sanitation system design 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 676 sanitation system design companies based in the United States

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Sanitation system design companies based in the United States at a glance

As of Sep 22, 2026

39.1%Verified-email coverage

23.3Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

264

11-50

259

51-200

105

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 676 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 sanitation system design 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 “sanitation system design 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 sanitation system design 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 sanitation system design 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, 6,143 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 22, 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 sanitation system design 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 sanitation system design companies are there based in the United States?

RevenueBase identified 676 sanitation system design 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 sanitation system design companies?

Houston leads with 14 headquartered companies, followed by Austin (9) and Charlotte (6).

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 6,143 verified decision-maker contacts tracked across these 676 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 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 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.