Company lists · Data refreshed September 2026

Top 25 Pollution prevention nonprofits based in the United States

Name: Pollution prevention nonprofits based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 648 companies tracked

RevenueBase identified 648 pollution prevention nonprofits headquartered in the United States as of September 2026 and tracks 6,791 professional contacts across them, including 2,556 with verified work emails. New York is the largest hub.

This list covers pollution prevention nonprofits 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

648Companies

6,791Contacts tracked

2,556Verified emails

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The 25 largest pollution prevention nonprofits based in the United States

Ranked by team size

Top 25 of 648 pollution prevention nonprofits based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to pollution prevention nonprofits: 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	Chesapeake BAY Foundation	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 20, 2026	51-200	312 contacts →
	Partial evidence “The Chesapeake Bay Foundation (CBF) fights for bold and creative solutions to the pollution that plagues the Bay and its tributaries.” Source: RevenueBase Database · checked Sep 20, 2026
2	Union Of Concerned Scientists	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 20, 2026	201-500	254 contacts →
	Indirect evidence “Our mission is to use rigorous, independent science to solve our planet's most pressing problems.” Source: RevenueBase Database · checked Sep 20, 2026
3	League Of Conservation Voters	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	218 contacts →
	Indirect 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 20, 2026
4	Conservation LAW Foundation	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	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 20, 2026
5	Ecology Action	Indirect evidence	Santa Cruz, CA, United StatesHQ checked Sep 20, 2026	51-200	140 contacts →
	Indirect evidence “Ecology Action is an award-winning California 501(c)(3) non-profit that’s been inspiring sustainable community actions since 1970.” Source: RevenueBase Database · checked Sep 20, 2026
6	Pure Earth	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	11-50	123 contacts →
	Indirect 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 20, 2026
7	Environmental Working Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	120 contacts →
	Indirect 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 20, 2026
8	CET	Indirect evidence	Northampton, MA, United StatesHQ checked Sep 20, 2026	51-200	103 contacts →
	Indirect evidence “CET helps people and businesses save energy and reduce waste.” Source: RevenueBase Database · checked Sep 20, 2026
9	GDB Paint & Coatings	Indirect evidence	Nashville, IL, United StatesHQ checked Sep 20, 2026	201-500	103 contacts →
	Indirect evidence “GDB Paint & Coatings provides sustainability solutions to the global paint industry.” Source: RevenueBase Database · checked Sep 20, 2026
10	Urban Ecology Center	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	51-200	93 contacts →
	Indirect evidence “Our vision is to inspire generations to build environmental curiosity, understanding, and respect.” Source: RevenueBase Database · checked Sep 20, 2026
11	Environment America	Partial evidence	Denver, CO, United StatesHQ checked Sep 20, 2026	51-200	93 contacts →
	Partial evidence “Every day, we see more heartbreaking evidence of the damage being done to our planet: climate change, plastic pollution, wildlife disappearing forever.” Source: RevenueBase Database · checked Sep 20, 2026
12	Bridging The GAP	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	11-50	83 contacts →
	Indirect evidence “Bridging The Gap brings people together to protect and restore the web of life on Earth and foster inclusive, thriving communities through environmental education, innovation, and…” Source: RevenueBase Database · checked Sep 20, 2026
13	Save The Sound	Indirect evidence	New Haven, CT, United StatesHQ checked Sep 20, 2026	11-50	74 contacts →
	Indirect evidence “Save the Sound leads environmental action across Connecticut, Westchester, NYC, and Long Island.” Source: RevenueBase Database · checked Sep 20, 2026
14	Save The Water STW	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 20, 2026	51-200	71 contacts →
	Partial evidence “Save the Water™ (STW™) is a U.S-based nonprofit organization dedicated to water quality research.” Source: RevenueBase Database · checked Sep 20, 2026
15	The Cleo Institute	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	11-50	67 contacts →
	Indirect evidence “The CLEO Institute is a women-led 501(c)(3) non-profit, non-partisan organization dedicated to educating and empowering communities to demand climate action, ensuring a safe…” Source: RevenueBase Database · checked Sep 20, 2026
16	Cafeteria Culture	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	n/a	66 contacts →
	Partial evidence “Cafeteria Culture (CafCu), is an environmental education nonprofit working creatively with youth to achieve equitable zero waste, climate-smart school communities and a plastic…” Source: RevenueBase Database · checked Sep 20, 2026
17	Sequoia Climate Foundation	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 20, 2026	11-50	63 contacts →
	Indirect evidence “Sequoia Climate Foundation believes in a world powered by clean energy, where all people are protected by policies that have averted the worst effects of climate change.” Source: RevenueBase Database · checked Sep 20, 2026
18	Resource Central	Indirect evidence	Boulder, CO, United StatesHQ checked Sep 20, 2026	11-50	62 contacts →
	Indirect evidence “We are Resource Central: determined to make conservation so simple that you don’t even realize you’re doing it.” Source: RevenueBase Database · checked Sep 20, 2026
19	I Love A Clean SAN Diego	Partial evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	11-50	61 contacts →
	Partial evidence “I Love A Clean San Diego (ILACSD) is an environmental nonprofit supporting San Diego County residents and businesses through education, volunteer events and workshops since 1954.” Source: RevenueBase Database · checked Sep 20, 2026
20	Eco-Cycle	Indirect evidence	Boulder, CO, United StatesHQ checked Sep 20, 2026	51-200	58 contacts →
	Indirect evidence “Eco-Cycle is a 501 (c)(3) non-profit organization committed to finding solutions to climate change through the concepts and practices of Zero Waste.” Source: RevenueBase Database · checked Sep 20, 2026
21	Clean AIR Council	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	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 20, 2026
22	Keep America Beautiful	Partial evidence	Stamford, CT, United StatesHQ checked Sep 20, 2026	11-50	49 contacts →
	Partial evidence “Keep America Beautiful®, the nation’s leading community improvement nonprofit organization, inspires and educates people to take action every day to improve and beautify their…” Source: RevenueBase Database · checked Sep 20, 2026
23	Ecology Center, Berkeley	Partial evidence	Berkeley, CA, United StatesHQ checked Sep 20, 2026	11-50	48 contacts →
	Partial evidence “Founded in 1969, the Ecology Center is a nonprofit organization, located in Berkeley, California, that focuses on the environmental impacts of urban residents.” Source: RevenueBase Database · checked Sep 20, 2026
24	Bonneville Environmental Foundation BEF	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	46 contacts →
	Partial evidence “A national nonprofit, BEF empowers businesses to be in balance with the environment through a full suite of environmental products, educational and community engagement programs…” Source: RevenueBase Database · checked Sep 20, 2026
25	Natural Resources Council Of Maine	Partial evidence	Augusta, ME, United StatesHQ checked Sep 20, 2026	11-50	42 contacts →
	Partial evidence “The Natural Resources Council of Maine is our state’s leading nonprofit membership organization protecting, restoring, and conserving Maine’s environment, now and for future…” Source: RevenueBase Database · checked Sep 20, 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: pollution prevention nonprofits. 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 pollution prevention nonprofits.
Partial evidence: Its own public description names part of pollution prevention nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pollution prevention nonprofits. 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 648 pollution prevention nonprofits based in the United States

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Pollution prevention nonprofits based in the United States at a glance

As of Sep 20, 2026

37.6%Verified-email coverage

10.5Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

473

11-50

141

51-200

201-500

501-1,000

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 648 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 pollution prevention nonprofits, 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 “pollution prevention nonprofits”. 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 pollution prevention nonprofits), 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 pollution prevention nonprofits, 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, 2,556 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 pollution prevention nonprofits, 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 pollution prevention nonprofits are there based in the United States?

RevenueBase identified 648 pollution prevention nonprofits 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?

Chesapeake BAY Foundation, headquartered in Annapolis, tops this list with the largest team on record.

Which city has the most pollution prevention nonprofits?

New York leads with 18 headquartered companies, followed by Washington (15) and Pittsburgh (14).

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 2,556 verified decision-maker contacts tracked across these 648 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.