Company lists · Data refreshed September 2026

Top 25 Water resources development companies based in the United States

Name: Water resources development 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 481 companies tracked

RevenueBase identified 481 water resources development companies headquartered in the United States as of September 2026 and tracks 39,767 professional contacts across them, including 16,184 with verified work emails. Houston is the largest hub.

This list covers water resources development 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

481Companies

39,767Contacts tracked

16,184Verified emails

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The 25 largest water resources development companies based in the United States

Ranked by team size

Top 25 of 481 water resources development 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 water resources development 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	Tetra Tech	Partial evidence	Pasadena, CA, United StatesHQ checked Sep 22, 2026	10001+	12,999 contacts →
	Partial evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
2	CDM Smith	Partial evidence	Boston, MA, United StatesHQ checked Sep 22, 2026	5,001-10,000	7,527 contacts →
	Partial evidence “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
3	STV	Indirect evidence	New York, NY, United StatesHQ checked Sep 22, 2026	1,001-5,000	3,556 contacts →
	Indirect evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 22, 2026
4	Carollo Engineers	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,718 contacts →
	Partial evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 22, 2026
5	Shimmick Corporation	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 22, 2026	1,001-5,000	760 contacts →
	Indirect evidence “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Source: RevenueBase Database · checked Sep 22, 2026
6	Barnard	Indirect evidence	Bozeman, MT, United StatesHQ checked Sep 22, 2026	201-500	603 contacts →
	Indirect evidence “In 1975, Tim Barnard moved to Montana with an idea that he could start his own construction company.” Source: RevenueBase Database · checked Sep 22, 2026
7	Kennedy Jenks	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	201-500	578 contacts →
	Partial evidence “For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Source: RevenueBase Database · checked Sep 22, 2026
8	MWH	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 22, 2026	501-1,000	428 contacts →
	Indirect evidence “As a leading U.S.” Source: RevenueBase Database · checked Sep 22, 2026
9	Tata & Howard, INC	Indirect evidence	Marlborough, MA, United StatesHQ checked Sep 22, 2026	51-200	315 contacts →
	Indirect evidence “Tata & Howard is a 100% employee owned, award-winning, specialized consulting engineering firm dedicated to providing superior client service coupled with delivering…” Source: RevenueBase Database · checked Sep 22, 2026
10	Lakeshore Global Corporation	Partial evidence	Detroit, MI, United StatesHQ checked Sep 22, 2026	201-500	280 contacts →
	Partial evidence “LGC Global delivers 100+ years of technical expertise in turnkey design-build and traditional construction, renovation and rehabilitation (including historical buildings), water…” Source: RevenueBase Database · checked Sep 22, 2026
11	West Yost	Partial evidence	Davis, CA, United StatesHQ checked Sep 22, 2026	201-500	279 contacts →
	Partial evidence “West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…” Source: RevenueBase Database · checked Sep 22, 2026
12	Mcmillen	Strong evidence	Boise, ID, United StatesHQ checked Sep 22, 2026	201-500	226 contacts →
	Strong evidence “Water is a powerful and precious resource that deserves responsible management.” Source: RevenueBase Database · checked Sep 22, 2026
13	Ulliman Schutte Construction	Partial evidence	Miamisburg, OH, United StatesHQ checked Sep 22, 2026	501-1,000	196 contacts →
	Partial evidence “Ulliman Schutte is a national leader in providing water infrastructure in the United States.” Source: RevenueBase Database · checked Sep 22, 2026
14	Albert A. Webb Associates Webb	Indirect evidence	Riverside, CA, United StatesHQ checked Sep 22, 2026	51-200	185 contacts →
	Indirect evidence “Albert A.” Source: RevenueBase Database · checked Sep 22, 2026
15	Davis & Floyd, INC	Indirect evidence	Greenwood, SC, United StatesHQ checked Sep 22, 2026	51-200	179 contacts →
	Indirect evidence “At Davis & Floyd, we design and engineer innovative solutions that enrich the world around us.” Source: RevenueBase Database · checked Sep 22, 2026
16	Felix Construction Company	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 22, 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 22, 2026
17	EKI Environment & Water, INC	Strong evidence	Daly City, CA, United StatesHQ checked Sep 22, 2026	51-200	167 contacts →
	Strong evidence “EKI Environment & Water, Inc.(EKI) is an employee-owned company that has provided comprehensive water resources and engineering services to public and private sector clients for…” Source: RevenueBase Database · checked Sep 22, 2026
18	Rizzo International	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	165 contacts →
	Indirect evidence “RIZZO International, Inc.(RIZZO) is a global engineering and consulting firm headquartered in Pittsburgh, Pennsylvania US.” Source: RevenueBase Database · checked Sep 22, 2026
19	Petticoat-Schmitt Civil Contractors, INC	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 22, 2026	201-500	156 contacts →
	Indirect evidence “Headquartered in Jacksonville, Florida, Petticoat-Schmitt Civil Contractors, Inc, is a privately owned civil contracting firm.” Source: RevenueBase Database · checked Sep 22, 2026
20	Buchart Horn, INC	Partial evidence	York, PA, United StatesHQ checked Sep 22, 2026	201-500	146 contacts →
	Partial evidence “The professionals at Buchart Horn strengthen communities by designing the infrastructure to provide us with clean water, protect our environment, promote safe travel, enhance…” Source: RevenueBase Database · checked Sep 22, 2026
21	Rh2 Engineering	Partial evidence	Bothell, WA, United StatesHQ checked Sep 22, 2026	51-200	136 contacts →
	Partial evidence “RH2 is an innovative, full-service engineering firm specializing in water and wastewater related projects.” Source: RevenueBase Database · checked Sep 22, 2026
22	Water Works Engineers	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 22, 2026	51-200	135 contacts →
	Partial 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
23	CWE	Indirect evidence	Fullerton, CA, United StatesHQ checked Sep 22, 2026	11-50	128 contacts →
	Indirect evidence “CWE, an Apex Company, is a dynamic, award-winning civil engineering firm composed of engineers, scientists, designers, and construction support professionals.” Source: RevenueBase Database · checked Sep 22, 2026
24	Rice Lake Construction Group	Partial evidence	Deerwood, MN, United StatesHQ checked Sep 22, 2026	201-500	125 contacts →
	Partial evidence “At Rice Lake Construction Group, we know water.” Source: RevenueBase Database · checked Sep 22, 2026
25	Wildcat Construction Co., INC	Partial evidence	Wichita, KS, United StatesHQ checked Sep 22, 2026	201-500	120 contacts →
	Partial evidence “For over 25 years, Wildcat Construction has been a regional leader in bridge building and rehabilitation, concrete structures, plant construction, storm and sanitary sewers, water…” 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: water resources development 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 water resources development companies.
Partial evidence: Its own public description names part of water resources development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources development 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 481 water resources development companies based in the United States

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Water resources development companies based in the United States at a glance

As of Sep 22, 2026

40.7%Verified-email coverage

82.7Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

194

11-50

164

51-200

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 481 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 water resources development 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 “water resources development 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 water resources development 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 water resources development 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, 16,184 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 water resources development 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 water resources development companies are there based in the United States?

RevenueBase identified 481 water resources development 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?

Tetra Tech, headquartered in Pasadena, tops this list with the largest team on record.

Which city has the most water resources development companies?

Houston leads with 11 headquartered companies, followed by Austin (8) and Denver (8).

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 16,184 verified decision-maker contacts tracked across these 481 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.