Company lists · Data refreshed September 2026

Top 24 Environmental liability law firms based in Portland, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 30 companies tracked

RevenueBase identified 30 environmental liability law firms headquartered in Portland, United States as of September 2026 and tracks 405 professional contacts across them, including 282 with verified work emails. Across the United States, New York is the largest hub for this category (83 companies); Portland has 30.

This list covers environmental liability law firms 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 28, 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 28, 2026 86% judged on-target in blind review

30Companies

405Contacts tracked

282Verified emails

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The 24 largest environmental liability law firms based in Portland, United States

Ranked by team size

Top 24 of 30 environmental liability law firms based in Portland, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental liability law firms: 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	Markowitz Herbold PC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	51-200	78 contacts →
	Partial evidence “Markowitz Herbold is a litigation law firm with offices in Portland, Oregon, and New York City.” Source: RevenueBase Database · checked Sep 28, 2026
2	Lindsay Hart LLP	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	56 contacts →
	Indirect evidence “Located in Portland, Oregon, the attorneys of Lindsay Hart offer a full range of experienced litigation services to companies, public entities, and individuals.” Source: RevenueBase Database · checked Sep 28, 2026
3	Davis Rothwell Earle & Xóchihua PC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	54 contacts →
	Indirect evidence “Davis Rothwell is your source for Northwest litigation defense.” Source: RevenueBase Database · checked Sep 28, 2026
4	Chock Barhoum	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Chock Barhoum LLP is one of the preeminent litigation firms in the Northwest.” Source: RevenueBase Database · checked Sep 28, 2026
5	Chenoweth LAW Group	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “At Chenoweth Law Group, P.C, we provide effective advocacy in complex commercial and civil litigation.” Source: RevenueBase Database · checked Sep 28, 2026
6	Schroeder LAW Offices, PC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Over 30 years experience in regulatory compliance; consulting; permitting; transactional due diligence and document drafting; education; advocacy in agency matters; representation…” Source: RevenueBase Database · checked Sep 28, 2026
7	Mcdowell Rackner Gibson PC	Strong evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Strong evidence “Energy, Environmental, and Telecommunications Law, these fields are undergoing constant change and rapid growth.” Source: RevenueBase Database · checked Sep 28, 2026
8	Ring Bender LLP	Strong evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Strong evidence “Environmental and Municipal Law From our offices in Pennsylvania, California, and Oregon, we practice as one law firm, holding closely to core values that start with a deep…” Source: RevenueBase Database · checked Sep 28, 2026
9	Evren Northwest, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
10	Petruccelli, Martin & Haddow, LLP	Partial evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “Petruccelli, Martin & Haddow, LLP, one of Maine’s premier law firms, has been providing successful, aggressive and innovative legal representation in a wide variety of matters for…” Source: RevenueBase Database · checked Sep 28, 2026
11	Carr Butterfield, LLP	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “Carr Butterfield, LLP is a client-focused law firm near Portland, Oregon.” Source: RevenueBase Database · checked Sep 28, 2026
12	Hoffman LAW LLC	Strong evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	9 contacts →
	Strong evidence “Hoffman Law provides expert criminal defense to individual and corporate clients in all varieties of serious, complex cases, including white-collar, corporate, environmental…” Source: RevenueBase Database · checked Sep 28, 2026
13	Rizzo Bosworth Eraut PC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “UPDATE: On July 16, 2025, Rizzo Bosworth Eraut PC combined with Pierce Davis & Perritano LLP.” Source: RevenueBase Database · checked Sep 28, 2026
14	Rizk Law, P.C	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “RIZKLAW is a Portland law firm started by lawyer and social activist Richard Rizk in late 2001.” Source: RevenueBase Database · checked Sep 28, 2026
15	EES Environmental Consulting INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 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 28, 2026
16	Landform LAW	Partial evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Landform Law, LLC, offers a full range of civil legal services for property owners, developers, municipalities, and public interest groups in Maine, with special expertise in land…” Source: RevenueBase Database · checked Sep 28, 2026
17	Aquarius Environmental, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Aquarius Environmental is an environmental engineering and consulting firm specializing in water related design, treatment, and compliance.” Source: RevenueBase Database · checked Sep 28, 2026
18	Rosen & Schneider, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Rosen & Schneider, LLC, is built on more than 40 years of experience in civil litigation, with a focus on aviation and product liability defense claims.” Source: RevenueBase Database · checked Sep 28, 2026
19	Pacific Northwest LAW LLP	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Pacific Northwest Law, LLP • Complex Litigation and Consulting • We are experienced trial and appellate counsel dedicated to achieving the best possible outcomes for our clients.” Source: RevenueBase Database · checked Sep 28, 2026
20	Angeli LAW Group	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	1 contacts →
	Partial evidence “The Angeli Law Group provides its clients with a vigorous and skilled defense in all manner of disputes in state and federal courts.” Source: RevenueBase Database · checked Sep 28, 2026
21	EDE Environmental, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “I specialize in helping my clients navigate the ever-evolving landscape of environmental regulation and property remediation, bringing technical expertise, critical thinking, and…” Source: RevenueBase Database · checked Sep 28, 2026
22	JDC Law, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Litigation, regulatory compliance and risk management attorneys located in Portland Oregon, focusing on cost effective representation in the areas of business and product…” Source: RevenueBase Database · checked Sep 28, 2026
23	Underhill LAW Office	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Underhill Law Office provides legal and government ethics and risk management advice to lawyers, law firms, corporate in-house counsel, government attorneys, elected officials and…” Source: RevenueBase Database · checked Sep 28, 2026
24	Mcfadden Environmental LLC	Partial evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “McFadden Environmental is an environmental consulting firm based in Portland Maine.” Source: RevenueBase Database · checked Sep 28, 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 liability law firms. 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 liability law firms.
Partial evidence: Its own public description names part of environmental liability law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental liability law firms. 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 30 environmental liability law firms based in Portland, United States

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Environmental liability law firms based in Portland, United States at a glance

As of Sep 28, 2026

69.6%Verified-email coverage

13.5Average contacts per company

1-10Median size (employees)

Sep 28, 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 30 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 liability law firms, 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 liability law firms”. 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 liability law firms), 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 liability law firms, 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, 282 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 28, 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 liability law firms 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 liability law firms, 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 liability law firms are there based in Portland, United States?

RevenueBase identified 30 environmental liability law firms 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?

Markowitz Herbold PC, headquartered in Portland, tops this list with the largest team on record.

Which city in the United States has the most environmental liability law firms?

New York leads the United States with 83 headquartered companies, followed by Houston (77) and Washington (65). Portland has 30.

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 282 verified decision-maker contacts tracked across these 30 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 28, 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.