Company lists · Data refreshed September 2026

Top 23 Environmental organizations based in Chicago, United States

Name: Environmental organizations based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 62 companies tracked

RevenueBase identified 62 environmental organizations headquartered in Chicago, United States as of September 2026 and tracks 549 professional contacts across them, including 213 with verified work emails. Washington is the largest hub.

This list covers environmental organizations headquartered in Chicago, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

62Companies

549Contacts tracked

213Verified emails

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The 23 largest environmental organizations based in Chicago, United States

Ranked by team size

Top 23 of 62 environmental organizations based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental organizations: 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	BBJ Group	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	51-200	97 contacts →
	Strong evidence “BBJ provides clients with solutions to environmental, health and safety problems.” Source: RevenueBase Database · checked Sep 19, 2026
2	Environmental LAW & Policy Center	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	83 contacts →
	Strong evidence “The Environmental Law & Policy Center is the Midwest’s leading environmental advocacy organization.” Source: RevenueBase Database · checked Sep 19, 2026
3	WRD Environmental	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	64 contacts →
	Strong evidence “WRD Environmental helps organizations committed to sustainability realize their vision.” Source: RevenueBase Database · checked Sep 19, 2026
4	Openlands	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	60 contacts →
	Indirect evidence “As innovative protectors and stewards of the land since 1963, Openlands exists to create access to nature for all.” Source: RevenueBase Database · checked Sep 19, 2026
5	Earthacre	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	15 contacts →
	Indirect evidence “EarthAcre’s mission is to mitigate climate change and biodiversity collapse with community knowledge and technology.” Source: RevenueBase Database · checked Sep 19, 2026
6	Sierra Club Illinois Chapter	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “Sierra Club Illinois Chapter is a Non-profit Organization Management company located in 200 N Michigan Ave # 505, Chicago, Illinois, United States.” Source: RevenueBase Database · checked Sep 19, 2026
7	Urban Rivers	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	12 contacts →
	Indirect evidence “Our Mission: To transform urban waterways into wildlife sanctuaries, and to provide an opportunity for all city residents to reconnect with nature in new and meaningful ways.” Source: RevenueBase Database · checked Sep 19, 2026
8	Environment Illinois	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Homepage 050319 - No Bees, No Food” Source: RevenueBase Database · checked Sep 19, 2026
9	Southeast Environmental Task Force	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	9 contacts →
	Strong evidence “SETF is an environmental nonprofit organization dedicated to serving the southeast side and south suburbs of Chicago by promoting environmental education, pollution prevention…” Source: RevenueBase Database · checked Sep 19, 2026
10	People For Community Recovery	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “People for Community Recovery (PCR) was founded in June 1979 by its founder and executive director, Hazel Johnson.” Source: RevenueBase Database · checked Sep 19, 2026
11	The Astor Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “The Astor Company opened its doors almost 20 years ago as a cardboard recycling company, beginning a journey of continuous adaptation and evolution which today finds a world-class…” Source: RevenueBase Database · checked Sep 19, 2026
12	Green Wings	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Strong evidence “Green Wings is a non-profit flight crew organization aimed at increasing efforts towards environmental sustainability in aviation.” Source: RevenueBase Database · checked Sep 19, 2026
13	Lookfar Conservation	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Lookfar Conservation is a 501(c)(3) nonprofit organization dedicated to defending wild and wondrous places and working with the people living in and among them.” Source: RevenueBase Database · checked Sep 19, 2026
14	Greenleaf Communities NFP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Greenleaf Communities was established as a nonprofit 501(c)(3) organization to advance a healthy and sustainable world by recruiting and organizing multi-disciplinary teams of…” Source: RevenueBase Database · checked Sep 19, 2026
15	Neighbors For Environmental Justice	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Strong evidence “The purpose of Neighbors for Environmental Justice is to educate, advocate and organize with our community to accomplish environmental justice on the southwest side of Chicago.” Source: RevenueBase Database · checked Sep 19, 2026
16	Environmental Group Services Limited Egsl	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	4 contacts →
	Strong evidence “Environmental Group Services, Ltd.(EGSL) is a full service environmental engineering, training and consulting company located in Chicago, Illinois.” Source: RevenueBase Database · checked Sep 19, 2026
17	Chicago Environmental Justice Network	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Strong evidence “The Chicago Environmental Justice Network (CEJN) is a coalition bringing together BIPOC-led, neighborhood-based, grassroots environmental justice organizations working throughout…” Source: RevenueBase Database · checked Sep 19, 2026
18	Chicago Muslims Green Team	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	11-50	3 contacts →
	Strong evidence “Chicago Muslims Green Team connects Chicago Muslims and the greater community to issues of environmental justice and spreads awareness about an eco-friendly lifestyle based on…” Source: RevenueBase Database · checked Sep 19, 2026
19	The Ecovoice Project	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Strong evidence “The EcoVP is an arts organization designed to bring awareness to climate change and environmental issues through musical performance.” Source: RevenueBase Database · checked Sep 19, 2026
20	Fresh Supply INC	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Strong evidence “Fresh Supply's journey began in science classrooms on the West Side of Chicago, where we partnered with community youth to tackle environmental injustices, such as air pollution…” Source: RevenueBase Database · checked Sep 19, 2026
21	Good Stuff Marketing CO	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Believe Green LLC	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “We apply a Business mindset to solve Environmental problems.” Source: RevenueBase Database · checked Sep 19, 2026
23	Constructive Approaches, LLC	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “Constructive Approaches is a consulting firm focused on helping clients make informed choices that minimize environmental impact in construction projects and business operations.” Source: RevenueBase Database · checked Sep 19, 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: environmental organizations. 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 organizations.
Partial evidence: Its own public description names part of environmental organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental organizations. 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 23 of 62 environmental organizations based in Chicago, United States

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Environmental organizations based in Chicago, United States at a glance

As of Sep 19, 2026

38.8%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

337.1%Largest-city concentration · Washington

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

10001+

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 62 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 organizations, 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 Chicago, United States whose own description of what they do matches “environmental organizations”. 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 organizations), 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 organizations, and records with no verified work email. Companies headquartered outside Chicago 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, 213 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.

Environmental organizations by metro in the United States

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 organizations, 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 organizations are there based in Chicago, United States?

RevenueBase identified 62 environmental organizations headquartered in Chicago, 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?

BBJ Group, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most environmental organizations?

Washington leads with 209 headquartered companies, followed by New York (204) and Los Angeles (133).

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 213 verified decision-maker contacts tracked across these 62 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.