Company lists · Data refreshed November 2026

Top 25 Water supply system operators based in the United States

RevenueBase identified 418 company matches for water supply system operators associated with the United States as of November 2026 and tracks 14,736 professional contacts across them, including 6,195 with verified work emails. Littleton is the largest hub.

This list covers company matches for water supply system operators associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
418Companies
14,736Contacts tracked
6,195Verified emails
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The 25 largest water supply system operators based in the United States

Ranked by team size
Top 25 of 418 company matches for water supply system operators based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchOakland, CA, United StatesHQ recorded Nov 6, 20261,001-5,0001,504 contacts →

Exact match

“East Bay Municipal Utility District is a California public utility that supplies high-quality drinking water, generates renewable energy and provides wastewater treatment and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLaurel, MD, United StatesHQ recorded Nov 6, 20261,001-5,0001,263 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchHorsham, PA, United StatesHQ recorded Nov 6, 20261,001-5,0001,107 contacts →

Exact match

“As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchKissimmee, FL, United StatesHQ recorded Nov 6, 2026501-1,000283 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSan Diego, CA, United StatesHQ recorded Nov 6, 2026201-500274 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchWaukegan, IL, United StatesHQ recorded Nov 6, 20265,001-10,000252 contacts →

Exact match

“Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLafayette, LA, United StatesHQ recorded Nov 6, 2026501-1,000183 contacts →

Exact match

“For more than 125 years, LUS has been a community partner committed to enhancing quality of life through reliable service, competitive pricing and safety.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHartford, CT, United StatesHQ recorded Nov 6, 2026501-1,000168 contacts →

Exact match

“The Metropolitan District (MDC) is a non-profit municipal corporation chartered by the Connecticut General Assembly in 1929 to provide potable water and sewerage services on a…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchIselin, DE, United StatesHQ recorded Nov 6, 2026201-500165 contacts →

Exact match

“Middlesex Water Company (NASDAQ:MSEX) provides a full range of regulated and non-regulated water, wastewater utility and related services primarily in New Jersey and Delaware.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchDe Land, FL, United StatesHQ recorded Nov 6, 2026201-500156 contacts →

Exact match

“The City of DeLand Utilities/Public Services Department and its associated engineering and facilities maintenance divisions is to provide the citizens of the greater DeLand area…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchGreenville, SC, United StatesHQ recorded Nov 6, 2026201-500155 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchWest Palm Beach, FL, United StatesHQ recorded Nov 6, 2026501-1,000155 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLeesburg, VA, United StatesHQ recorded Nov 6, 202651-200127 contacts →

Exact match

“Water Reclamation Plant”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchDes Moines, IA, United StatesHQ recorded Nov 6, 2026201-500121 contacts →

Exact match

“Water plays a crucial role in your health and safety, and Des Moines Water Works (DMWW) plays a key role in providing you with a safe, clean, and reliable water supply.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchMerced, CA, United StatesHQ recorded Nov 6, 202651-200117 contacts →

Exact match

“Merced Irrigation District owns, operates and maintains the New Exchequer and McSwain dams, reservoirs, and hydroelectric facilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchClinton, CT, United StatesHQ recorded Nov 6, 2026201-500116 contacts →

Exact match

“Connecticut Water is a regulated public water utility that is committed to providing high-quality water and world-class service to families and communities while being good…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 2026501-1,000111 contacts →

Exact match

“USG Water Solutions is the leading water utility services provider specializing in storage tanks, plant rehabilitation, metering, and distribution systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchVail, CO, United StatesHQ recorded Nov 6, 202651-200103 contacts →

Exact match

“The Eagle River Water & Sanitation District is a local government that provides efficient, reliable water and wastewater service to its customers from east Vail to Wolcott.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchAllentown, PA, United StatesHQ recorded Nov 6, 202651-200102 contacts →

Exact match

“Lehigh County Authority (LCA) is a public water and wastewater utility committed to providing unparalleled service to residents and businesses in all our service areas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchChula Vista, CA, United StatesHQ recorded Nov 6, 202651-20095 contacts →

Exact match

“Sweetwater Authority (Authority) is a publicly owned water agency with policies and procedures established by a seven-member Board of Directors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMarietta, GA, United StatesHQ recorded Nov 6, 202651-20093 contacts →

Exact match

“The Cobb County-Marietta Water Authority (CCMWA) is a regional public utility that provides potable (drinking and fire protection) water on a wholesale basis to 11 retail water…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchDalton, United StatesHQ recorded Nov 6, 2026201-50093 contacts →

Exact match

“Dalton Utilities has operated as a public utility since 1889, and provides potable water, electrical, natural gas and wastewater treatment services to the City of Dalton and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchFairburn, GA, United StatesHQ recorded Nov 6, 202651-20090 contacts →

Exact match

“Municipality located in Fulton County about ten minutes southwest of Hartfield-Jackson Atlanta International Airport and about twenty-five minutes from downtown Atlanta.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchMontgomery, United StatesHQ recorded Nov 6, 2026201-50088 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchColumbia, MO, United StatesHQ recorded Nov 6, 2026201-50088 contacts →

Exact match

“Headquartered in Columbia, Missouri, Alliance Water Resources is a leading provider of professional operations and maintenance services for community water and wastewater systems…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 418 water supply system operators based in the United States

See the full list, filter by size, metro and specialty, and access 6,195 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water supply system operators based in the United States at a glance

As of Nov 6, 2026
42.0%Verified-email coverage
35.3Average contacts per company
11-50Median size (employees)
1.0%Largest-city concentration · Littleton
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
157
11-50
100
51-200
95
201-500
33
501-1,000
14
1,001-5,000
12
5,001-10,000
2
10001+
1

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 418 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “water supply system operators” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 6,195 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “water supply system operators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water supply system operators are there based in the United States?

RevenueBase identified 418 company matches for water supply system operators associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

EBMUD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most water supply system operators?

Littleton leads with 4 company records, followed by Bloomington (3) and Houston (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 6,195 professional contacts with verified work emails tracked across these 418 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.