Company lists · Data refreshed September 2026
Top 25 Irrigation authorities based in the United States
RevenueBase identified 289 irrigation authorities headquartered in the United States as of September 2026 and tracks 9,319 professional contacts across them, including 3,821 with verified work emails. Bakersfield is the largest hub.
This list covers irrigation authorities 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 20, 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.
The 25 largest irrigation authorities based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,543 contacts → | ||||
Indirect evidence “The Metropolitan Water District of Southern California is a cooperative of 26 cities and water agencies serving nearly 19 million people in six counties.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 949 contacts → | ||||
Indirect 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 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 413 contacts → | ||||
Partial evidence “The Irrigation Association is the leading membership organization for irrigation equipment and system manufacturers, dealers, distributors, designers, consultants, contractors and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 382 contacts → | ||||
Indirect evidence “Central Arizona Project is a close-knit team of highly skilled professionals that fulfill an extremely valuable mission: reliably managing and delivering Colorado River water to…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 330 contacts → | ||||
Indirect 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 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 283 contacts → | ||||
Partial evidence “Established in 1887, the Turlock Irrigation District is the first publicly owned irrigation district in the state and one of only four in California today that also provides…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 266 contacts → | ||||
Indirect evidence “Established in 1887.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 265 contacts → | ||||
Indirect 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 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 260 contacts → | ||||
Indirect evidence “CVWD was formed in 1918 to protect and conserve local water sources.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 226 contacts → | ||||
Indirect 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 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 170 contacts → | ||||
Indirect evidence “Cape Fear Public Utility Authority (CFPUA) is the consolidated public body providing water and sewer services for the residents of the City of Wilmington and New Hanover County…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 135 contacts → | ||||
Indirect evidence “Chartered in 1912, Marin Water is California’s first and the oldest municipal water district.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 124 contacts → | ||||
Indirect evidence “Serving people, agriculture, businesses, and the environment in El Dorado County since 1925.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 112 contacts → | ||||
Indirect evidence “Weathermatic is a leading provider of water-conserving technology and services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 105 contacts → | ||||
Partial evidence “Merced Irrigation District owns, operates and maintains the New Exchequer and McSwain dams, reservoirs, and hydroelectric facilities.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 101 contacts → | ||||
Indirect evidence “Moulton Niguel Water District provides high-quality drinking water, recycled water and wastewater treatment services to customers in Aliso Viejo, Laguna Niguel, Laguna Hills…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 86 contacts → | ||||
Indirect evidence “Sweetwater Authority (Authority) is a publicly owned water agency with policies and procedures established by a seven-member Board of Directors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 65 contacts → | ||||
Indirect evidence “West Basin Municipal Water District (West Basin) is a wholesale water agency that serves nearly one million people in 17 cities and unincorporated areas in Los Angeles County.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 52 contacts → | ||||
Indirect evidence “The District's mission is to provide a reliable supply of quality water at the most reasonable cost to the present and future customers within the Goleta Water District.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 49 contacts → | ||||
Partial evidence “Nevada Irrigation District (NID) was formed in 1921 and headquartered in Grass Valley, California, a picturesque and historic California Gold Rush town in the foothills of the…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 42 contacts → | ||||
Partial evidence “Solano Irrigation District (SID) is an independent special district, a local government agency, formed in 1948.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 42 contacts → | ||||
Indirect evidence “Established in 1951 by a special act of the State legislature, the Kings River Conservation District is a multi-county, special district formed to manage the lower Kings River…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 40 contacts → | ||||
Indirect evidence “The South Tahoe Public Utility District, a public agency established on September 28, 1950, supplies drinking water and provides sewage collection, treatment, and export to…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 36 contacts → | ||||
Indirect evidence “Calleguas was formed in 1953 to provide supplemental water supply to southern Ventura County.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: irrigation authorities. 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 irrigation authorities.
- Partial evidence
- Its own public description names part of irrigation authorities, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name irrigation authorities. 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 289 irrigation authorities based in the United States
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Irrigation authorities based in the United States at a glance
As of Sep 20, 2026Companies by employee count
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 289 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 irrigation authorities, 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 “irrigation authorities”. 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 irrigation authorities), 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 irrigation authorities, 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, 3,821 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 20, 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 irrigation authorities, 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 irrigation authorities are there based in the United States?
RevenueBase identified 289 irrigation authorities 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?
Metropolitan Water District Of Southern California, headquartered in Los Angeles, tops this list with the largest team on record.
Which city has the most irrigation authorities?
Bakersfield leads with 6 headquartered companies, followed by Fresno (6) and Houston (3).
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 3,821 verified decision-maker contacts tracked across these 289 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 20, 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.