Company lists · Data refreshed September 2026

Top 24 Environmental nonprofits based in San Diego, United States

Name: Environmental nonprofits based in San Diego, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 58 companies tracked

RevenueBase identified 58 environmental nonprofits headquartered in San Diego, United States as of September 2026 and tracks 2,169 professional contacts across them, including 141 with verified work emails. Washington is the largest hub.

This list covers environmental nonprofits headquartered in San Diego, 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

58Companies

2,169Contacts tracked

141Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 24 largest environmental nonprofits based in San Diego, United States

Ranked by team size

Top 24 of 58 environmental nonprofits based in San Diego, 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 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	I Love A Clean SAN Diego	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	61 contacts →
	Strong 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 19, 2026
2	MY Green LAB	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	50 contacts →
	Indirect evidence “My Green Lab is a non-profit organization with a mission to build a global culture of sustainability in science.” Source: RevenueBase Database · checked Sep 19, 2026
3	SAN Diego Bird Alliance	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	35 contacts →
	Indirect evidence “Together we defend our region's birds, unique biodiversity, and threatened habitats through advocacy, education, and restoration.” Source: RevenueBase Database · checked Sep 19, 2026
4	Sandiego350	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	23 contacts →
	Partial evidence “SanDiego350 is an inclusive volunteer 501(c)(3) nonprofit organization devoted to inspiring a movement to prevent the worst impacts of climate change and climate injustice, and to…” Source: RevenueBase Database · checked Sep 19, 2026
5	SAN Diego Coastkeeper	Indirect evidence	San Diego, United StatesHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “San Diego Coastkeeper protects the region’s bays, beaches, watersheds and ocean for the people and wildlife that depend on them.” Source: RevenueBase Database · checked Sep 19, 2026
6	Torrey Pines Environmental	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	15 contacts →
	Partial evidence “Torrey Pines Environmental is an environmental consulting firm established in 2021 as a collaboration between biologists with over 35 years of combined experience.” Source: RevenueBase Database · checked Sep 19, 2026
7	TMA Bluetech	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	15 contacts →
	Indirect evidence “Founded in 2007, TMA BlueTech is the first and largest ocean and water technologies cluster organization in the United States, and one of the most prominent BlueTech clusters…” Source: RevenueBase Database · checked Sep 19, 2026
8	GO Greenish	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	201-500	12 contacts →
	Partial evidence “Go Greenish is a student-led nonprofit and student activist movement across 4 school districts representing 224 K-12 schools working to bridge student empowerment and…” Source: RevenueBase Database · checked Sep 19, 2026
9	Climate Science Alliance	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	12 contacts →
	Indirect evidence “Our mission is to accelerate community-driven, nature-based solutions to climate change by making sure local efforts get the resources, visibility, and support they need to…” Source: RevenueBase Database · checked Sep 19, 2026
10	Mission Trails Regional Park Foundation	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	10 contacts →
	Partial evidence “The Mission Trails Regional Park (MTRP) Foundation works in partnership with the City of San Diego to preserve and protect the natural environment of Mission Trails Regional Park…” Source: RevenueBase Database · checked Sep 19, 2026
11	Seal Awards	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	8 contacts →
	Partial evidence “SEAL (Sustainability, Environmental Achievement & Leadership) Awards is an environmental advocacy organization that honors leadership through our corporate sustainability awards &…” Source: RevenueBase Database · checked Sep 19, 2026
12	Busby Biological Services INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
13	Environmental Research Center	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial evidence “Environmental Research Center, Inc.(“ERC”) is a non-profit corporation organized under California's Non-Profit Public Benefit Corporation Law, whose mission is to safeguard the…” Source: RevenueBase Database · checked Sep 19, 2026
14	Just Transition Alliance	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “The Just Transition Alliance was founded in 1997 as a coalition of environmental justice and labor organizations.” Source: RevenueBase Database · checked Sep 19, 2026
15	Hammond Climate Solutions Foundation	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	5 contacts →
	Indirect evidence “Hammond Climate Solutions Foundation is on a mission to expedite positive change for a just and livable future for all.” Source: RevenueBase Database · checked Sep 19, 2026
16	Allgoods	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “allgoods is a non-profit media company, educating consumers and empowering humanity to contribute to systems that support the environment and evolve our economies.” Source: RevenueBase Database · checked Sep 19, 2026
17	SAN Diego Urban Sustainability Coalition	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Indirect evidence “Our Vision: Empowered individuals.” Source: RevenueBase Database · checked Sep 19, 2026
18	Torrey Pines Conservancy	Partial evidence	San Diego, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Partial evidence “Torrey Pines Conservancy is a nonprofit dedicated to protecting and enhancing Torrey Pines State Natural Reserve-one of the rarest and most iconic coastal landscapes in North…” Source: RevenueBase Database · checked Sep 19, 2026
19	Nimbus	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “The stealth operator behind leading sustainable home brands.” Source: RevenueBase Database · checked Sep 19, 2026
20	SEA To CEA	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Sea to Cea is an earth friendly travel and lifestyle brand, inspiring you to Spread the Good.” Source: RevenueBase Database · checked Sep 19, 2026
21	Ecological Conservation And Management, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Paddle For Peace	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “At Paddle for Peace, our mission is to diversify the coast.” Source: RevenueBase Database · checked Sep 19, 2026
23	ONE Step Projects	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	1 contacts →
	Partial evidence “One Step Projects is a 501(c)3 nonprofit organization dedicated to developing custom-engineered solutions to build healthy communities, improve living conditions, and promote…” Source: RevenueBase Database · checked Sep 19, 2026
24	Ellspo ECO	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “In 2020, Ellspo Eco took root.” 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 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 environmental nonprofits.
Partial evidence: Its own public description names part of environmental nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental 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 24 of 58 environmental nonprofits based in San Diego, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 141 reachable decision-makers.

Free signup · no credit card

View the full list →

Environmental nonprofits based in San Diego, United States at a glance

As of Sep 19, 2026

6.5%Verified-email coverage

37.4Average contacts per company

1-10Median size (employees)

336.2%Largest-city concentration · Washington

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for San Diego, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 58 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 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 San Diego, United States whose own description of what they do matches “environmental 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 environmental 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 environmental nonprofits, and records with no verified work email. Companies headquartered outside San Diego 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, 141 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 nonprofits 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 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 environmental nonprofits are there based in San Diego, United States?

RevenueBase identified 58 environmental nonprofits headquartered in San Diego, 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?

I Love A Clean SAN Diego, headquartered in San Diego, tops this list with the largest team on record.

Which city has the most environmental nonprofits?

Washington leads with 195 headquartered companies, followed by New York (194) and San Francisco (126).

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 141 verified decision-maker contacts tracked across these 58 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 58 environmental nonprofits based in San Diego, United States. Start with a free account, no credit card.

Download this list →

Related lists

Environmental nonprofits by geography

Browse the directory

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.