Company lists · Data refreshed September 2026

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

RevenueBase identified 30 company matches for environmental liability law firms associated with 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 (84 companies); Portland has 30.

This list covers company matches for environmental liability law firms associated with Portland, 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 September 28, 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 Sep 28, 2026 How this list was built
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 company matches for environmental liability law firms based in Portland, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202651-20078 contacts →

Exact match

“Markowitz Herbold is a litigation law firm with offices in Portland, Oregon, and New York City.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5056 contacts →

Exact match

“Located in Portland, Oregon, the attorneys of Lindsay Hart offer a full range of experienced litigation services to companies, public entities, and individuals.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5054 contacts →

Exact match

“Davis Rothwell is your source for Northwest litigation defense.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5036 contacts →

Exact match

“Chock Barhoum LLP is one of the preeminent litigation firms in the Northwest.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5035 contacts →

Exact match

“At Chenoweth Law Group, P.C, we provide effective advocacy in complex commercial and civil litigation.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5020 contacts →

Exact match

“Over 30 years experience in regulatory compliance; consulting; permitting; transactional due diligence and document drafting; education; advocacy in agency matters; representation…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5016 contacts →

Exact match

“Energy, Environmental, and Telecommunications Law, these fields are undergoing constant change and rapid growth.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-5010 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchPortland, ME, United StatesHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-1010 contacts →

Exact match

“Carr Butterfield, LLP is a client-focused law firm near Portland, Oregon.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-109 contacts →

Exact match

“Hoffman Law provides expert criminal defense to individual and corporate clients in all varieties of serious, complex cases, including white-collar, corporate, environmental…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-509 contacts →

Exact match

“UPDATE: On July 16, 2025, Rizzo Bosworth Eraut PC combined with Pierce Davis & Perritano LLP.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-506 contacts →

Exact match

“RIZKLAW is a Portland law firm started by lawyer and social activist Richard Rizk in late 2001.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-104 contacts →

Exact match

“EES is a unique team of professional consultants specializing in environmental assessment, investigation, and cleanup services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchPortland, ME, United StatesHQ recorded Sep 28, 20261-104 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-103 contacts →

Exact match

“Aquarius Environmental is an environmental engineering and consulting firm specializing in water related design, treatment, and compliance.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-103 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-103 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchPortland, OR, United StatesHQ recorded Sep 28, 202611-501 contacts →

Exact match

“The Angeli Law Group provides its clients with a vigorous and skilled defense in all manner of disputes in state and federal courts.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-101 contacts →

Exact match

“I specialize in helping my clients navigate the ever-evolving landscape of environmental regulation and property remediation, bringing technical expertise, critical thinking, and…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-101 contacts →

Exact match

“Litigation, regulatory compliance and risk management attorneys located in Portland Oregon, focusing on cost effective representation in the areas of business and product…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchPortland, OR, United StatesHQ recorded Sep 28, 20261-101 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchPortland, ME, United StatesHQ recorded Sep 28, 20261-101 contacts →

Exact match

“McFadden Environmental is an environmental consulting firm based in Portland Maine.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 24 of 30 environmental liability law firms based in Portland, United States

See the full list, filter by size, metro and specialty, and access 282 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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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
16
11-50
13
51-200
1

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

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 Portland, United States whose business descriptions match “environmental liability law 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 282 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 September 28, 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.

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 liability law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental liability law firms are there based in Portland, United States?

RevenueBase identified 30 company matches for environmental liability law firms associated with Portland, United States as of September 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?

Markowitz Herbold PC 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 liability law firms?

New York leads the United States with 84 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 282 professional contacts with verified work emails tracked across these 30 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 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 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.