Company lists · Data refreshed October 2026

Top 22 Environmental consulting firms based in Irvine, United States

Name: Environmental consulting firms based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 33 companies tracked

RevenueBase identified 33 company matches for environmental consulting firms associated with Irvine, United States as of October 2026 and tracks 1,226 professional contacts across them, including 515 with verified work emails. Across the United States, Houston is the largest hub for this category (145 companies); Irvine has 33.

This list covers company matches for environmental consulting firms associated with Irvine, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built

33Companies

1,226Contacts tracked

515Verified emails

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The 22 largest environmental consulting firms based in Irvine, United States

Ranked by team size

Top 22 of 33 company matches for environmental consulting firms based in Irvine, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	LSA	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	201-500	332 contacts →
	Exact match “LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Interwest Consulting Group	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	201-500	221 contacts →
	Exact match “Interwest specializes in providing professional and consulting services to public agencies across California, Nevada, Colorado, and beyond.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	IDS Group, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	51-200	205 contacts →
	Exact match “IDS is an award-winning engineering and architectural firm offering multidisciplinary consulting services through our staff of 90 professionals.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	EPD Solutions, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	51-200	64 contacts →
	Exact match “EPD was created to assist clients through the complex regulatory and interdisciplinary process required to bring projects to fruition in the most thoughtful manner.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	T&b Planning, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	39 contacts →
	Exact match “T&B Planning provides due diligence, land use planning, entitlement, CEQA/NEPA compliance, development services, project management, and GIS services from our offices in Irvine…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	C&v Consulting, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	37 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Ultrasystems Environmental, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	51-200	35 contacts →
	Exact match “UltraSystems is a leader in compliance with federal, state, and local environmental regulations governing project planning and development.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Adep Precision Contracting	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	51-200	30 contacts →
	Exact match “ADEP Precision’s (ADEP) vision is to be the safest, most reliable demolition and remediation contractor in the nation, persistent in the pursuit of client and employee excellence.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	M.S. Hatch Consulting, LLC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	20 contacts →
	Exact match “M.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Terra Pacific Group Incorporated	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	14 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	EHS International, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	14 contacts →
	Exact match “ehsInc provides a single source for our client’s environmental, health, and safety compliance and training needs.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Murex Environmental	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	10 contacts →
	Exact match “Murex Environmental, Inc.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Advanced Earth Sciences, A Verdantas Company	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	9 contacts →
	Exact match “Advanced Earth Sciences, Inc.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Avocet Environmental, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	7 contacts →
	Exact match “A civil and environmental engineering company with expertise in environmental infrastructure (water, wastewater, storm water, landfills), environmental assessment, and remediation.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Dopudja & Wells Consulting, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	1-10	7 contacts →
	Exact match “Dopudja & Wells Consulting, Inc, is a firm specifically focused in the water and wastewater utility sector.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	Nebula Safety And Environmental	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	1-10	6 contacts →
	Exact match “Nebula Safety & Environmental is a process safety and engineering company specializing in risk analysis and safety program implementation.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Parzy Consulting	Exact match	Irvine, United StatesHQ recorded Oct 1, 2026	11-50	6 contacts →
	Exact match “We’re Parzy Consulting, and we’re here to help you achieve your environment, health, safety and sustainability goals.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	Spurgin & Associates	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	1-10	4 contacts →
	Exact match “For three decades Spurgin & Associates has assisted government and industry in the development and management of environmental programs.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	KES Environmental	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	3 contacts →
	Exact match “Our goal is to efficiently assist New and Existing construction, along with Industrial customers with the complex array of Environmental rules and regulations issued by the local…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Zmassociates Environmental Corporation	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	3 contacts →
	Exact match “ZMassociates Environmental Corp.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	Remediation Sciences	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	11-50	3 contacts →
	Exact match “Remediation Sciences is a full service environmental consulting and remediation organization that provides services in environmental sciences and hydrology.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	ES Works	Exact match	Irvine, CA, United StatesHQ recorded Oct 1, 2026	1-10	1 contacts →
	Exact match “ESWORKS provides consulting for electrification projects, environmental compliance, and project management.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “environmental consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 22 of 33 environmental consulting firms based in Irvine, United States

See the full list, filter by size, metro and specialty, and access 515 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental consulting firms based in Irvine, United States at a glance

As of Oct 1, 2026

42.0%Verified-email coverage

37.2Average contacts per company

11-50Median size (employees)

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 33 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Irvine, United States whose business descriptions match “environmental consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 515 professional contacts with verified work emails across the full matched dataset. 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 October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Environmental consulting firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “environmental consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental consulting firms are there based in Irvine, United States?

RevenueBase identified 33 company matches for environmental consulting firms associated with Irvine, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

LSA tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most environmental consulting firms?

Houston leads the United States with 145 company records, followed by New York (124) and Seattle (84). Irvine has 33.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 515 professional contacts with verified work emails tracked across these 33 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 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 SmartSearch, 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.