Company lists · Data refreshed September 2026

Top 25 Water resource management companies based in the United States

Name: Water resource management 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 822 companies tracked

RevenueBase identified 822 water resource management companies headquartered in the United States as of September 2026 and tracks 31,841 professional contacts across them, including 11,755 with verified work emails. Houston is the largest hub.

This list covers water resource management 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

822Companies

31,841Contacts tracked

11,755Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest water resource management companies based in the United States

Ranked by team size

Top 25 of 822 water resource management 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 resource management 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	Evoqua Water Technologies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	10001+	2,639 contacts →
	Indirect evidence “Evoqua has now joined Xylem.” Source: RevenueBase Database · checked Sep 22, 2026
2	AQUA	Partial evidence	Bryn Mawr, PA, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,478 contacts →
	Partial evidence “Aqua is one of the largest U.S-based, publicly traded water and wastewater utilities, serving more than 3 million people in Illinois, Indiana, New Jersey, North Carolina…” Source: RevenueBase Database · checked Sep 22, 2026
3	EBMUD	Partial evidence	Oakland, CA, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,434 contacts →
	Partial evidence “East Bay Municipal Utility District is a California public utility that supplies high-quality drinking water, generates renewable energy and provides wastewater treatment and…” Source: RevenueBase Database · checked Sep 22, 2026
4	Inframark	Strong evidence	Horsham, PA, United StatesHQ checked Sep 22, 2026	1,001-5,000	973 contacts →
	Strong evidence “As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.” Source: RevenueBase Database · checked Sep 22, 2026
5	Valley Water	Strong evidence	San Jose, CA, United StatesHQ checked Sep 22, 2026	501-1,000	949 contacts →
	Strong evidence “Valley Water manages an integrated water resources system that includes the supply of clean, safe water, flood protection and stewardship of streams on behalf of Santa Clara…” Source: RevenueBase Database · checked Sep 22, 2026
6	Aquatech	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 22, 2026	501-1,000	903 contacts →
	Partial evidence “Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…” Source: RevenueBase Database · checked Sep 22, 2026
7	Gradiant	Partial evidence	Woburn, MA, United StatesHQ checked Sep 22, 2026	1,001-5,000	813 contacts →
	Partial evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 22, 2026
8	Dupont Water Solutions	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 22, 2026	10001+	470 contacts →
	Indirect evidence “We’re helping companies in every industry, in every corner of the globe make real progress.” Source: RevenueBase Database · checked Sep 22, 2026
9	Louisville Water Company	Partial evidence	Louisville, KY, United StatesHQ checked Sep 22, 2026	201-500	413 contacts →
	Partial evidence “Every day, nearly one million people depend on Louisville Water Company to provide safe, high-quality drinking water.” Source: RevenueBase Database · checked Sep 22, 2026
10	Inland Empire Utilities Agency	Partial evidence	Chino, CA, United StatesHQ checked Sep 22, 2026	201-500	330 contacts →
	Partial evidence “The Inland Empire Utilities Agency (IEUA) is a municipal water district that supplies imported and recycled water; collects and treats wastewater; and provides other utility…” Source: RevenueBase Database · checked Sep 22, 2026
11	Parkson Corporation	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 22, 2026	51-200	317 contacts →
	Partial evidence “Parkson Corporation is a supplier of innovative, cost effective solutions for potable water, process water, and industrial and municipal wastewater treatment.” Source: RevenueBase Database · checked Sep 22, 2026
12	Aquarion Water Company	Partial evidence	Bridgeport, CT, United StatesHQ checked Sep 22, 2026	201-500	308 contacts →
	Partial evidence “Aquarion Water Company is the public water supply and wastewater treatment company for more than people in 73 cities and towns in Connecticut, Massachusetts and New Hampshire.” Source: RevenueBase Database · checked Sep 22, 2026
13	Keystone Clearwater Solutions	Strong evidence	Hershey, PA, United StatesHQ checked Sep 22, 2026	501-1,000	268 contacts →
	Strong evidence “Keystone Clearwater Solutions is moving water forward with engineered solutions for safer, more efficient water transfer, water management, and environmental services.” Source: RevenueBase Database · checked Sep 22, 2026
14	SAN Diego County Water Authority	Partial evidence	San Diego, CA, United StatesHQ checked Sep 22, 2026	201-500	265 contacts →
	Partial evidence “The San Diego County Water Authority sustains a $262 billion regional economy and the quality of life for 3.3 million residents through a multi-decade water supply diversification…” Source: RevenueBase Database · checked Sep 22, 2026
15	Coachella Valley Water District	Partial evidence	Palm Desert, CA, United StatesHQ checked Sep 22, 2026	201-500	260 contacts →
	Partial evidence “CVWD was formed in 1918 to protect and conserve local water sources.” Source: RevenueBase Database · checked Sep 22, 2026
16	Clayton County Water Authority	Partial evidence	Morrow, GA, United StatesHQ checked Sep 22, 2026	201-500	229 contacts →
	Partial evidence “Clayton County Water Authority (CCWA) is located in metropolitan Atlanta and provides water, sewer and stormwater services to more than people through accounts.” Source: RevenueBase Database · checked Sep 22, 2026
17	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
18	Southern Nevada Water Authority	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 22, 2026	1,001-5,000	226 contacts →
	Partial evidence “The Southern Nevada Water Authority (SNWA) is a cooperative agency formed in 1991 to address Southern Nevada's unique water needs on a regional basis.” Source: RevenueBase Database · checked Sep 22, 2026
19	EL Paso Water	Partial evidence	El Paso, TX, United StatesHQ checked Sep 22, 2026	501-1,000	213 contacts →
	Partial evidence “Provide sustainable high quality water services.” Source: RevenueBase Database · checked Sep 22, 2026
20	Fluence Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 22, 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 22, 2026
21	Brazos River Authority	Indirect evidence	Waco, TX, United StatesHQ checked Sep 22, 2026	201-500	162 contacts →
	Indirect evidence “The Brazos River Authority was created by the Texas Legislature in 1929 as the first government entity in the United States created specifically for the purpose of developing and…” Source: RevenueBase Database · checked Sep 22, 2026
22	City Of Austin	Partial evidence	Austin, TX, United StatesHQ checked Sep 22, 2026	n/a	154 contacts →
	Partial evidence “City of Austin - Austin Water Utility is an utilities company based out of 625 E 10TH ST, Austin, Texas, United States.” Source: RevenueBase Database · checked Sep 22, 2026
23	Palm Beach County Water Utilities Department	Partial evidence	West Palm Beach, FL, United StatesHQ checked Sep 22, 2026	501-1,000	151 contacts →
	Partial evidence “The third largest water utility department in the State of Florida, the Palm Beach County Water Utilities Department (PBCWUD) provides drinking water, wastewater collection and…” Source: RevenueBase Database · checked Sep 22, 2026
24	Apex Water And Process	Strong evidence	St Michael, MN, United StatesHQ checked Sep 22, 2026	201-500	143 contacts →
	Strong evidence “Apex, a trusted leader in water and process management, delivers integrated solutions that empower agricultural, commercial, and industrial customers across the U.S.” Source: RevenueBase Database · checked Sep 22, 2026
25	Greenville Water	Partial evidence	Greenville, SC, United StatesHQ checked Sep 22, 2026	201-500	143 contacts →
	Partial evidence “Greenville Water is the largest water utility in South Carolina, delivering clean, reliable drinking water to more than residents across Greenville and parts of Anderson, Pickens…” 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 resource management 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 resource management companies.
Partial evidence: Its own public description names part of water resource management companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resource management 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 822 water resource management companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 11,755 reachable decision-makers.

Free signup · no credit card

View the full list →

Water resource management companies based in the United States at a glance

As of Sep 22, 2026

36.9%Verified-email coverage

38.7Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

364

11-50

234

51-200

140

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 822 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 resource management 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 resource management 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 resource management 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 resource management 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, 11,755 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 resource management 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 resource management companies are there based in the United States?

RevenueBase identified 822 water resource management 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?

Evoqua Water Technologies, headquartered in Washington, tops this list with the largest team on record.

Which city has the most water resource management companies?

Houston leads with 16 headquartered companies, followed by Denver (13) and Portland (11).

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 11,755 verified decision-maker contacts tracked across these 822 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.

Ready to reach these companies? Verified emails and direct dials for all 822 water resource management companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Water resource management companies by geography

Browse the directory

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.