Company lists · Data refreshed September 2026
Top 25 Environmental health advocacy groups based in the United States
RevenueBase identified 281 environmental health advocacy groups headquartered in the United States as of September 2026 and tracks 6,483 professional contacts across them, including 2,702 with verified work emails. Washington is the largest hub.
This list covers environmental health advocacy groups 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 environmental health advocacy groups based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 942 contacts → | ||||
Partial evidence “NRDC is the nation's most effective environmental action organization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 366 contacts → | ||||
Strong evidence “Since our founding during the campaign to pass the landmark Clean Water Act in 1972, Clean Water Action has worked to win strong health and environmental protections by bringing…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 218 contacts → | ||||
Partial evidence “LCV believes our earth is worth fighting for because everyone has a right to clean air, water, and a safe, healthy community.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 181 contacts → | ||||
Strong evidence “Our mission is to improve opportunities for health and well-being by preventing the spread of disease, promoting healthy living, and protecting the environment.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 174 contacts → | ||||
Indirect evidence “Since 1966, CLF has taken on powerful opponents who would pollute our air and water and squander our resources.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 123 contacts → | ||||
Partial evidence “Pure Earth is a global leader in improving public health and development outcomes by reducing exposure to lead and other toxic pollutants.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 120 contacts → | ||||
Strong evidence “The Environmental Working Group is a non-profit, non-partisan organization dedicated to protecting human health and the environment.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 107 contacts → | ||||
Strong evidence “The National Environmental Health Association (NEHA) supports thousands of members who are committed to ensuring that the air we breathe, the food we eat, the water we drink and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 89 contacts → | ||||
Strong evidence “The Center for Science in the Public Interest (CSPI) is a non-profit health-advocacy group based in Washington, DC, that focuses on nutrition and food safety.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 79 contacts → | ||||
Partial evidence “PIRG is an advocate for the public interest.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 61 contacts → | ||||
Indirect evidence “Our Children’s Trust is a 501(c)(3) non-profit organization that elevates the voice of youth and leads the federal, state, local, and international campaign to secure the legal…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 57 contacts → | ||||
Partial evidence “The Clean Air Council is a member-supported, nonprofit environmental organization dedicated to protecting everyone's right to breathe clean air.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 51 contacts → | ||||
Indirect evidence “Friends of the Earth is a bold and fearless voice for justice and the planet.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 51 contacts → | ||||
Strong evidence “Washington Conservation Action’s mission is to advocate for environmental progress and justice through actions that mobilize the public, elect champions for the environment, and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 48 contacts → | ||||
Partial evidence “Ohio Citizen Action organizes and mobilizes people to advocate for public interests.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 45 contacts → | ||||
Strong evidence “VPIRG’s mission is to promote and protect the health of Vermont’s people, environment and locally-based economy by informing and mobilizing individuals and communities across the…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 43 contacts → | ||||
Partial evidence “Children’s Health Defense® is a 501(c)(3) non-profit organization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 42 contacts → | ||||
Indirect evidence “The Future Is Worth The Fight.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 41 contacts → | ||||
Strong evidence “The mission of the Ohio Environmental Council (OEC) is to secure healthy air, land, and water for all who call Ohio home.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 40 contacts → | ||||
Indirect evidence “EIP combines research, reporting, and media outreach to spotlight illegal pollution, expose political intimidation of enforcement staff, and encourage federal and state agencies…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 40 contacts → | ||||
Partial evidence “HEI is a nonprofit corporation chartered in 1980 as an independent research organization to provide high-quality, impartial, and relevant science on the health effects of air…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 39 contacts → | ||||
Partial evidence “Founded in 1970, the Ecology Center is organized for one purpose - to develop innovative solutions for healthy people and a healthy planet.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 38 contacts → | ||||
Strong evidence “The Environmental League of Massachusetts advocates for policy that meets the scale and urgency of our environmental challenges.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 38 contacts → | ||||
Partial evidence “For over 30 years, we have been the leading science-based policy and advocacy organization working to prevent breast cancer by eliminating our exposure to toxic chemicals.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 35 contacts → | ||||
Strong evidence “TCE is dedicated to informing and mobilizing Texans to protect the quality of their lives, their health, their communities and the environment.” 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: environmental health advocacy groups. 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 environmental health advocacy groups.
- Partial evidence
- Its own public description names part of environmental health advocacy groups, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name environmental health advocacy groups. 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 281 environmental health advocacy groups based in the United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,702 reachable decision-makers.
Free signup · no credit card
Environmental health advocacy groups 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 281 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 environmental health advocacy groups, 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 “environmental health advocacy groups”. 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 environmental health advocacy groups), 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 environmental health advocacy groups, 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, 2,702 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 environmental health advocacy groups, 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 environmental health advocacy groups are there based in the United States?
RevenueBase identified 281 environmental health advocacy groups 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?
Natural Resources Defense Council Nrdc, headquartered in New York, tops this list with the largest team on record.
Which city has the most environmental health advocacy groups?
Washington leads with 22 headquartered companies, followed by New York (12) and Denver (8).
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 2,702 verified decision-maker contacts tracked across these 281 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.
Ready to reach these companies? Verified emails and direct dials for all 281 environmental health advocacy groups based in the United States. Start with a free account, no credit card.
Download this list →Related lists
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States