Company lists · Data refreshed September 2026

Top 25 Environmental consulting companies based in San Diego, United States

Name: Environmental consulting companies 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 45 companies tracked

RevenueBase identified 45 environmental consulting companies headquartered in San Diego, United States as of September 2026 and tracks 603 professional contacts across them, including 260 with verified work emails. Houston is the largest hub.

This list covers environmental consulting companies 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

45Companies

603Contacts tracked

260Verified emails

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The 25 largest environmental consulting companies based in San Diego, United States

Ranked by team size

Top 25 of 45 environmental consulting companies 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 consulting companies: 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	Recon Environmental, INC	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	84 contacts →
	Strong evidence “Environmental consulting • Ecological restoration • 50+ years of service • 100% employee-owned” Source: RevenueBase Database · checked Sep 19, 2026
2	Occupational Services, INC	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	74 contacts →
	Strong evidence “Occupational Services, Incorporated is a San Diego-based professional consulting firm providing services in the areas of environmental compliance, occupational health and safety…” Source: RevenueBase Database · checked Sep 19, 2026
3	Scst, LLC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	52 contacts →
	Indirect evidence “SCST,LLC is now Atlas.” Source: RevenueBase Database · checked Sep 19, 2026
4	Great Ecology	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	48 contacts →
	Strong evidence “Great Ecology, now part of the True Environmental platform, is a leading ecological consulting and landscape architecture firm that delivers innovative environmental solutions to…” Source: RevenueBase Database · checked Sep 19, 2026
5	KMEA	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	48 contacts →
	Indirect evidence “Company Overview Founded in 1996, KMEA is headquartered in San Diego, California, and has an operations office in San Antonio, TX.” Source: RevenueBase Database · checked Sep 19, 2026
6	Trevet	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	40 contacts →
	Strong evidence “Trevet is a civil and environmental consulting company headquartered in San Diego, California.” Source: RevenueBase Database · checked Sep 19, 2026
7	Hargis Associates, INC	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	37 contacts →
	Strong evidence “Hargis + Associates, Inc.(H+A) is an employee-owned, environmental consulting and engineering firm founded in 1979 with a commitment to providing high-quality, cost-effective…” Source: RevenueBase Database · checked Sep 19, 2026
8	Paradigm An Ulteig Company	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	31 contacts →
	Partial evidence “Ulteig- formerly Paradigm Environmetal - helps our clients protect and enhance the critical environmental, recreational and economic functions water systems provide to communities.” Source: RevenueBase Database · checked Sep 19, 2026
9	Katz & Associates	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	30 contacts →
	Indirect evidence “Katz & Associates is now Bodewell Group.” Source: RevenueBase Database · checked Sep 19, 2026
10	Rocks Biological Consulting	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Rocks Biological Consulting (RBC) is a San Diego-based, independently-owned small business that has been providing biological consulting services since 2004.” Source: RevenueBase Database · checked Sep 19, 2026
11	Torrey Pines Environmental	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	15 contacts →
	Strong 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
12	T3 Consulting, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “T3 Consulting, Inc.(T3) is a professional services firm that provides exceptional technical solutions focused on value-led service, quality, and dependability.” Source: RevenueBase Database · checked Sep 19, 2026
13	Blackhawk Environmental	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “Blackhawk Environmental, a certified DVBE / SDVOSB / City of San Diego SLBE, provides a wide range of cost-effective environmental consulting services in biological & water…” Source: RevenueBase Database · checked Sep 19, 2026
14	Bluescape Environmental	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “BlueScape is a progressive air quality and environmental services firm located in the Western US that specializes in permitting and compliance services.” Source: RevenueBase Database · checked Sep 19, 2026
15	Noreas Environmental Services	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “The Noreas Environmental Services/NAVFAC Southwest Environmental Services Team is committed to providing Treatment and Waste Management Services in an environmentally responsible…” Source: RevenueBase Database · checked Sep 19, 2026
16	Enviroapplications, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	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
18	Watkins Environmental	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	5 contacts →
	Partial evidence “The team at Watkins Environmental is recognized throughout the Western United States as leaders in the environmental remediation and demolition industry.” Source: RevenueBase Database · checked Sep 19, 2026
19	AIR Check Solutions, LLC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “At Air Check Solutions, LLC (ACS, LLC) our mission is to minimize environmental risks and protect the public health by providing to every client expert knowledge and prompt data…” Source: RevenueBase Database · checked Sep 19, 2026
20	Aurora Industrial Hygiene, Inc.	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “Aurora Industrial Hygiene's mission is to provide the highest quality industrial hygiene services to each of its customers through professional excellence, qualified staff…” Source: RevenueBase Database · checked Sep 19, 2026
21	Enviromine INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “EnviroMINE, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
22	EHS Analytical Solutions, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
23	Rely Environmental	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Strong evidence “Rely Environmental provides top-notch compliance consulting and management services to businesses, hospitals and public agencies throughout Southern California.” Source: RevenueBase Database · checked Sep 19, 2026
24	Ivet Environmental 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
25	Allstate Services	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Partial evidence “Allstate Services offers asbestos, lead and mold consulting and training services.” 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 consulting companies. 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 consulting companies.
Partial evidence: Its own public description names part of environmental consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental consulting companies. 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 45 environmental consulting companies based in San Diego, United States

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Environmental consulting companies based in San Diego, United States at a glance

As of Sep 19, 2026

43.1%Verified-email coverage

13.4Average contacts per company

11-50Median size (employees)

313.3%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 45 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 consulting companies, 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 consulting companies”. 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 consulting companies), 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 consulting companies, 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, 260 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 consulting companies 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 consulting companies, 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 consulting companies are there based in San Diego, United States?

RevenueBase identified 45 environmental consulting companies 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?

Recon Environmental, INC, headquartered in San Diego, tops this list with the largest team on record.

Which city has the most environmental consulting companies?

Houston leads with 141 headquartered companies, followed by New York (89) and Seattle (66).

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 260 verified decision-maker contacts tracked across these 45 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.