Company lists · Data refreshed September 2026

Top 25 Municipal water utilities based in the United States

Name: Municipal water utilities based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,095 companies tracked

RevenueBase identified 1,095 municipal water utilities headquartered in the United States as of September 2026 and tracks 42,103 professional contacts across them, including 18,515 with verified work emails. Houston is the largest hub.

This list covers municipal water utilities 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 17, 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 17, 2026 86% judged on-target in blind review

1,095Companies

42,103Contacts tracked

18,515Verified emails

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The 25 largest municipal water utilities based in the United States

Ranked by team size

Top 25 of 1,095 municipal water utilities based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to municipal water utilities: 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	LOS Angeles Department Of Water And Power	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,630 contacts →
	Strong evidence “The Los Angeles Department of Water and Power (LADWP), the largest municipal utility in the United States, was established more than 100 years ago to deliver reliable, safe water…” Source: RevenueBase Database · checked Sep 17, 2026
2	American Water	Partial evidence	Camden, NJ, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,876 contacts →
	Partial evidence “American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States.” Source: RevenueBase Database · checked Sep 17, 2026
3	Colorado Springs Utilities	Partial evidence	Colorado Springs, CO, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,675 contacts →
	Partial evidence “Colorado Springs Utilities is the largest community-owned, not-for-profit, four-service utility in the nation.” Source: RevenueBase Database · checked Sep 17, 2026
4	AQUA	Strong evidence	Bryn Mawr, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,478 contacts →
	Strong 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 17, 2026
5	EBMUD	Strong evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,434 contacts →
	Strong 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 17, 2026
6	Wssc Water	Strong evidence	Laurel, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,288 contacts →
	Strong evidence “Established in 1918, WSSC Water is currently among the largest water and wastewater utilities in the nation, with a network of nearly miles of drinking water pipeline and over…” Source: RevenueBase Database · checked Sep 17, 2026
7	Inframark	Partial evidence	Horsham, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	973 contacts →
	Partial 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 17, 2026
8	Denver Water	Partial evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	1,001-5,000	931 contacts →
	Partial evidence “Denver Water proudly serves high-quality water and promotes its efficient use to 1.5 million people in the city of Denver and many surrounding suburbs.” Source: RevenueBase Database · checked Sep 17, 2026
9	Orlando Utilities Commission OUC	Strong evidence	Orlando, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	828 contacts →
	Strong evidence “The Orlando Utilities Commission (OUC - The Reliable One) is a municipally-owned public utility providing electric and water services to the citizens of Orlando, Florida, St.” Source: RevenueBase Database · checked Sep 17, 2026
10	Gainesville Regional Utilities	Strong evidence	Gainesville, FL, United StatesHQ checked Sep 17, 2026	501-1,000	587 contacts →
	Strong evidence “Gainesville Regional Utilities (GRU) is a multi-service utility owned by the City of Gainesville and is the 5th largest municipal electric utility in Florida.” Source: RevenueBase Database · checked Sep 17, 2026
11	Lansing Board Of Water & Light	Strong evidence	Lansing, MI, United StatesHQ checked Sep 17, 2026	501-1,000	576 contacts →
	Strong evidence “The Board of Water & Light is a municipally owned public utility, not a private, investor-owned utility.” Source: RevenueBase Database · checked Sep 17, 2026
12	Great Lakes Water Authority	Partial evidence	Detroit, MI, United StatesHQ checked Sep 17, 2026	501-1,000	548 contacts →
	Partial evidence “The Great Lakes Water Authority (GLWA) is a regional water and sewer authority that services nearly 40 percent of the water customers in Michigan On June 12, 2015, history was…” Source: RevenueBase Database · checked Sep 17, 2026
13	Metropolitan Utilities District	Strong evidence	Omaha, NE, United StatesHQ checked Sep 17, 2026	501-1,000	451 contacts →
	Strong evidence “The mission of the Metropolitan Utilities District, headquartered in Omaha, Nebraska, is to provide safe, reliable and cost-effective natural gas and water services to our…” Source: RevenueBase Database · checked Sep 17, 2026
14	Greenville Utilities Commission	Partial evidence	Greenville, NC, United StatesHQ checked Sep 17, 2026	201-500	438 contacts →
	Partial evidence “Since 1905, Greenville Utilities has been an integral part of Greenville-Pitt County, growing and progressing along with our expanding service area.” Source: RevenueBase Database · checked Sep 17, 2026
15	Louisville Water Company	Partial evidence	Louisville, KY, United StatesHQ checked Sep 17, 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 17, 2026
16	Golden State Water Company	Partial evidence	San Dimas, CA, United StatesHQ checked Sep 17, 2026	501-1,000	406 contacts →
	Partial evidence “Founded in 1929, Golden State Water Company (Golden State Water) is an investor-owned public utility that provides water service to more than 1 million customers in over 80…” Source: RevenueBase Database · checked Sep 17, 2026
17	Inland Empire Utilities Agency	Strong evidence	Chino, CA, United StatesHQ checked Sep 17, 2026	201-500	330 contacts →
	Strong 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 17, 2026
18	Parkson Corporation	Strong evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 17, 2026	51-200	317 contacts →
	Strong 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 17, 2026
19	Aquarion Water Company	Partial evidence	Bridgeport, CT, United StatesHQ checked Sep 17, 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 17, 2026
20	SAN Jose Water	Partial evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	201-500	300 contacts →
	Partial evidence “Founded in 1866, San Jose Water is an investor owned public utility, and is one of the largest and most technically sophisticated urban water system in the United States.” Source: RevenueBase Database · checked Sep 17, 2026
21	Toho Water Authority	Partial evidence	Kissimmee, FL, United StatesHQ checked Sep 17, 2026	501-1,000	256 contacts →
	Partial evidence “Toho Water Authority was established in 2003 by a special act of the Florida legislature and provides a full range of water, wastewater and reclaimed water services to its…” Source: RevenueBase Database · checked Sep 17, 2026
22	Alcosan	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	201-500	242 contacts →
	Indirect evidence “ALCOSAN is one of the Pittsburgh region’s premiere environmental and public health organizations, treating wastewater for 83 Allegheny County communities, including the City of…” Source: RevenueBase Database · checked Sep 17, 2026
23	Usabluebook	Partial evidence	Waukegan, IL, United StatesHQ checked Sep 17, 2026	5,001-10,000	241 contacts →
	Partial evidence “Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
24	Clayton County Water Authority	Partial evidence	Morrow, GA, United StatesHQ checked Sep 17, 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 17, 2026
25	Phigenics	Partial evidence	Warrenville, IL, United StatesHQ checked Sep 17, 2026	51-200	197 contacts →
	Partial evidence “Phigenics is a leading provider of safe, smart, and superior water management programs aligned with ANSI/ASHRAE Standard 188 and Centers for Medicare & Medicaid Services (CMS) QSO…” Source: RevenueBase Database · checked Sep 17, 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: municipal water utilities. 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 municipal water utilities.
Partial evidence: Its own public description names part of municipal water utilities, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal water utilities. 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 1,095 municipal water utilities based in the United States

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Municipal water utilities based in the United States at a glance

As of Sep 17, 2026

44.0%Verified-email coverage

38.5Average contacts per company

11-50Median size (employees)

0.8%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

461

11-50

297

51-200

204

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 1,095 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 municipal water utilities, 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 “municipal water utilities”. 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 municipal water utilities), 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 municipal water utilities, 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, 18,515 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 17, 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 municipal water utilities, 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 municipal water utilities are there based in the United States?

RevenueBase identified 1,095 municipal water utilities 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?

LOS Angeles Department Of Water And Power, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most municipal water utilities?

Houston leads with 9 headquartered companies, followed by Greenville (6) and Grand Rapids (5).

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 18,515 verified decision-maker contacts tracked across these 1,095 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 17, 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.