Company lists · Data refreshed September 2026
Top 25 Clean water charities based in the United States
RevenueBase identified 205 clean water charities headquartered in the United States as of September 2026 and tracks 3,721 professional contacts across them, including 965 with verified work emails. Los Angeles is the largest hub.
This list covers clean water charities 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 19, 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 clean water charities based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 642 contacts → | ||||
Partial evidence “We believe there's a smart way to end the global water crisis.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 500 contacts → | ||||
Partial evidence “Water For People promotes the development of high-quality drinking water and sanitation services accessible to all – sustained by strong communities, businesses, and governments.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 312 contacts → | ||||
Strong evidence “charity: water is a non-profit bringing clean and safe drinking water to people around the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 216 contacts → | ||||
Partial evidence “Impact Water provides safe drinking water solutions to over partner schools, supporting 24 million students daily.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 197 contacts → | ||||
Partial evidence “WaterHealth International (WHI) is a global leader in providing access to safe, WHO-quality affordable drinking water to underserved communities.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 102 contacts → | ||||
Partial evidence “Transforming lives and sharing God's love through sustainable access to safe water, sanitation, and hygiene in the places that need it most.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 95 contacts → | ||||
Partial evidence “Safe Water Network is a dynamic non-profit organization committed to delivering innovative and sustainable solutions for safe water access in underserved communities.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 92 contacts → | ||||
Strong evidence “Wine To Water is a global nonprofit committed to loving and serving through the power of clean water.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 75 contacts → | ||||
Strong evidence “According to the World Bank: 2.2 billion people lack access to clean drinking water; 4.2 billion people lack access to safely managed sanitation services (e.g, toilets); 3 billion…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 69 contacts → | ||||
Partial evidence “Splash is a nonprofit organization that designs child-focused water, sanitation, hygiene (WASH), and menstrual health solutions for governments in some of the world’s biggest…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 69 contacts → | ||||
Partial evidence “At LifeStraw our mission is simple, we believe everyone deserves equitable access to safe drinking water.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 55 contacts → | ||||
Partial evidence “The Water Project, Inc, a dedicated 501(c)(3) non-profit, strives to alleviate the water crisis in sub-Saharan Africa, where water stress is notably higher than in many other…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 54 contacts → | ||||
Partial evidence “Thirst Project is the world’s largest youth water organization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 52 contacts → | ||||
Partial evidence “WaterAid is an international non-profit with one goal: to change the world through water.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 48 contacts → | ||||
Strong evidence “DigDeep is a human rights nonprofit working to ensure every person in the United States has access to clean running water and sanitation at home.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 40 contacts → | ||||
Strong evidence “At Filter of Hope, we share clean, safe drinking water and the gospel with people in desperate need of both.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 38 contacts → | ||||
Partial evidence “Dozens of field-tested technologies and management approaches can reduce the cost of operating a water system, even as service is improved.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 33 contacts → | ||||
Strong evidence “Waves For Water works on the front lines to provide access to clean water through the implementation of portable water filters, the construction and renovation of bore-hole wells…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 33 contacts → | ||||
Partial evidence “By using appropriate technology and training, WaterStep empowers volunteers and humanitarian professionals with the ability to assist communities with sustainable water solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 32 contacts → | ||||
Partial evidence “Planet Water Foundation delivers safe drinking water and hygiene education to underserved schools and communities across Asia-Pacific and Latin America and to disaster-affected…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 25 contacts → | ||||
Strong evidence “The mission of WorldServe is simple: to provide clean water, sanitation, education, and economic opportunities to alleviate suffering in Africa.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 24 contacts → | ||||
Partial evidence “Blood:Water partners with African community-driven organizations to end water- and HIV/AIDS-related health disparities through organizational strengthening and financial support.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Strong evidence “Living Waters for the World (LWW) trains and equips teams from churches and civic organizations to partner with communities on sustainable clean water projects.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 19 contacts → | ||||
Indirect evidence “Until all are served.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 18 contacts → | ||||
Partial evidence “WATERisLIFE provides safe drinking water, sanitation and hygiene education programs to schools and villages in desperate need.” Source: RevenueBase Database · checked Sep 19, 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: clean water charities. 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 clean water charities.
- Partial evidence
- Its own public description names part of clean water charities, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name clean water charities. 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 205 clean water charities based in the United States
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Clean water charities based in the United States at a glance
As of Sep 19, 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 205 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 clean water charities, 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 “clean water charities”. 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 clean water charities), 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 clean water charities, 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, 965 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 19, 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 clean water charities, 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 clean water charities are there based in the United States?
RevenueBase identified 205 clean water charities 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?
water.org, headquartered in Kansas City, tops this list with the largest team on record.
Which city has the most clean water charities?
Los Angeles leads with 10 headquartered companies, followed by New York (5) and Washington (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 965 verified decision-maker contacts tracked across these 205 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 19, 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.
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