Company lists · Data refreshed September 2026

Top 25 Environmental consulting and remediation based in Portland, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 60 companies tracked

RevenueBase identified 60 environmental consulting and remediation headquartered in Portland, United States as of September 2026 and tracks 319 professional contacts across them, including 110 with verified work emails. Houston is the largest hub.

This list covers environmental consulting and remediation headquartered in Portland, 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

60Companies

319Contacts tracked

110Verified emails

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The 25 largest environmental consulting and remediation based in Portland, United States

Ranked by team size

Top 25 of 60 environmental consulting and remediation based in Portland, 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 and remediation: 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	GSI Water Solutions, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	51-200	66 contacts →
	Strong evidence “GSI Water Solutions, Inc, is a specialized groundwater, environmental, and water resources consulting firm.” Source: RevenueBase Database · checked Sep 19, 2026
2	FB Environmental Associates	Partial evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	11-50	28 contacts →
	Partial evidence “Where Science Meets Civics" Our Mission: FB Environmental is dedicated to practical stewardship of our natural world.” Source: RevenueBase Database · checked Sep 19, 2026
3	Samara Group PDX	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	19 contacts →
	Partial evidence “Samara Group LLC was founded to enhance environmental projects centered around rigorous science, inclusive partnerships, and effective communications.” Source: RevenueBase Database · checked Sep 19, 2026
4	RED Technologies, LLC	Strong evidence	Portland, CT, United StatesHQ checked Sep 19, 2026	11-50	16 contacts →
	Strong evidence “RED Technologies, LLC (RED) is a privately held remediation, engineering and development contractor that provides waste transportation and disposal, environmental, and site…” Source: RevenueBase Database · checked Sep 19, 2026
5	Soil Solutions Environmental Services	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Soil Solutions Environmental Services Inc.” Source: RevenueBase Database · checked Sep 19, 2026
6	TCB Industrial Corporation	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “TCB Industrial Corporation is a 16 year leader in the environmental labor market with a reputation of providing a highly qualified and capable on-call work force with a focus on…” Source: RevenueBase Database · checked Sep 19, 2026
7	Evren Northwest, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
8	Northwest Watersheds	Indirect evidence	Portland, United StatesHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “Northwest Watersheds LLC provides water resources engineering services to protect communities, restore habitat, and provide climate resiliency.” Source: RevenueBase Database · checked Sep 19, 2026
9	Leeway Engineering Solutions, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Leeway Engineering Solutions (LW) provides unique solutions for water and wastewater public works service providers.” Source: RevenueBase Database · checked Sep 19, 2026
10	Aquatic Contracting	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	6 contacts →
	Partial evidence “Aquatic Contracting is a full service environmental/civil construction contractor with focused and specialized expertise in restoration of fish and wildlife habitat in and around…” Source: RevenueBase Database · checked Sep 19, 2026
11	Environmental Management Systems, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	5 contacts →
	Strong evidence “Environmental Management Systems, Inc.(EMS) Is a premier environmental consulting, engineering, and design firm headquartered in the Portland Metropolitan Area of Oregon.” Source: RevenueBase Database · checked Sep 19, 2026
12	Ehns Partners	Strong evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Strong evidence “EHNS Partners is a small dedicated team specializing in environmental, health, and safety consulting and engineering.” Source: RevenueBase Database · checked Sep 19, 2026
13	Northwest Energy Collaborative	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “Northwest Energy Collaborative is a Green Building Consulting Firm that applies high performance building improvement methods and extensive construction knowledge to help…” Source: RevenueBase Database · checked Sep 19, 2026
14	EES Environmental Consulting INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “EES is a unique team of professional consultants specializing in environmental assessment, investigation, and cleanup services.” Source: RevenueBase Database · checked Sep 19, 2026
15	Aquarius Environmental, LLC	Strong evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Strong evidence “Aquarius Environmental is an environmental engineering and consulting firm specializing in water related design, treatment, and compliance.” Source: RevenueBase Database · checked Sep 19, 2026
16	Lichen Land And Water INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	Naomi Mermin Consulting	Strong evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Strong evidence “Naomi Mermin Consulting, LLC, is a woman-owned (WOSB certified) healthy housing and environmental strategy firm based in Portland, ME.” Source: RevenueBase Database · checked Sep 19, 2026
18	Integrative Economics, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “We are building a transdisciplinary team to help tackle pest and disease challenges in agriculture.” Source: RevenueBase Database · checked Sep 19, 2026
19	Noble Creek Biological Consulting, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
20	E-Pur	Strong evidence	Portland, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Strong evidence “E-PUR provides client-focused hydrologic, geologic, engineering, and environmental consulting services on a wide range of water resource and water supply projects.” Source: RevenueBase Database · checked Sep 19, 2026
21	Ferment Service	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Partial evidence “Ferment Service provides fractional and T&M engineering consulting to CPG manufacturers, food and beverage producers, and industrial clients.” Source: RevenueBase Database · checked Sep 19, 2026
22	Hyatt Geosciences, LLC	Strong evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “Hyatt GeoSciences LLC (HGS) is an employee-owned consulting firm with over 20 years of experience providing client-focused geology and hydrogeology services for environmental…” Source: RevenueBase Database · checked Sep 19, 2026
23	Collinscea	Partial evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Partial evidence “CollinsCEA provides expert consulting, engineering, and advising services to utilities, government, and commercial and industrial customers.” Source: RevenueBase Database · checked Sep 19, 2026
24	Stable Environment Consulting, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “EMF Inspections - Indoor Environmental & Building Consulting We improve the quality of indoor environments in homes, offices, and other buildings where we live, work and play.” Source: RevenueBase Database · checked Sep 19, 2026
25	Justin B. Green Consulting	Strong evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “Solutions-Oriented Consultancy Providing Environment, Energy, and Government Consulting.” 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 and remediation. 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 and remediation.
Partial evidence: Its own public description names part of environmental consulting and remediation, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental consulting and remediation. 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 60 environmental consulting and remediation based in Portland, United States

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Environmental consulting and remediation based in Portland, United States at a glance

As of Sep 19, 2026

34.5%Verified-email coverage

5.3Average contacts per company

1-10Median size (employees)

283.3%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 Portland, so it is reported there. Company counts and contact totals on this page are exact for Portland, over 60 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 and remediation, 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 Portland, United States whose own description of what they do matches “environmental consulting and remediation”. 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 and remediation), 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 and remediation, and records with no verified work email. Companies headquartered outside Portland 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, 110 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 and remediation 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 and remediation, 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 and remediation are there based in Portland, United States?

RevenueBase identified 60 environmental consulting and remediation headquartered in Portland, 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?

GSI Water Solutions, INC, headquartered in Portland, tops this list with the largest team on record.

Which city has the most environmental consulting and remediation?

Houston leads with 170 headquartered companies, followed by New York (89) and Denver (74).

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 110 verified decision-maker contacts tracked across these 60 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.