Company lists · Data refreshed September 2026

Top 25 Aquatic ecosystem restoration companies based in the United States

RevenueBase identified 525 aquatic ecosystem restoration companies headquartered in the United States as of September 2026 and tracks 6,195 professional contacts across them, including 3,029 with verified work emails. Portland is the largest hub.

This list covers aquatic ecosystem restoration companies headquartered in the 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
525Companies
6,195Contacts tracked
3,029Verified emails
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The 25 largest aquatic ecosystem restoration companies based in the United States

Ranked by team size
Top 25 of 525 aquatic ecosystem restoration companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to aquatic ecosystem restoration 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceBellaire, TX, United StatesHQ checked Sep 19, 2026501-1,000677 contacts →

Indirect evidence

“As the nation’s largest nature-based solutions company, RES (Resource Environmental Solutions) is restoring a resilient earth for a modern world, project by project.”

Source: RevenueBase Database · checked Sep 19, 2026
2Partial evidenceSeattle, WA, United StatesHQ checked Sep 19, 202651-200176 contacts →

Partial evidence

“Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.”

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceCarmel, IN, United StatesHQ checked Sep 19, 202651-200133 contacts →

Indirect evidence

“SePRO Corporation is recognized as an industry leader in providing the highest level of technical services to customers who operate in specialty niche markets of the USA.”

Source: RevenueBase Database · checked Sep 19, 2026
4Indirect evidenceCincinnati, OH, United StatesHQ checked Sep 19, 202651-200124 contacts →

Indirect evidence

“Jones Lake Management has a history of excellence in fish production and lake management.”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidenceBerkeley, CA, United StatesHQ checked Sep 19, 202651-200115 contacts →

Indirect evidence

“Stillwater Sciences is committed to creating a better world through science.”

Source: RevenueBase Database · checked Sep 19, 2026
6Indirect evidenceJacksonville, FL, United StatesHQ checked Sep 19, 202651-200105 contacts →

Indirect evidence

“Since 1987, Taylor Engineering, Inc, with headquarters in Jacksonville, Florida; branch offices in Destin and Tampa, Florida; and regional staff throughout Florida and the North…”

Source: RevenueBase Database · checked Sep 19, 2026
7Partial evidenceMillersville, MD, United StatesHQ checked Sep 19, 2026201-500101 contacts →

Partial evidence

“Our mission is to be the keystone species in the restoration of the Chesapeake Bay.”

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceAnn Arbor, MI, United StatesHQ checked Sep 19, 202651-20091 contacts →

Indirect evidence

“Vision: We are engineers and scientists who have a passion for sustainable, clean water.”

Source: RevenueBase Database · checked Sep 19, 2026
9Partial evidenceSan Diego, CA, United StatesHQ checked Sep 19, 202651-20084 contacts →

Partial evidence

“Environmental consulting • Ecological restoration • 50+ years of service • 100% employee-owned”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceChico, CA, United StatesHQ checked Sep 19, 202651-20081 contacts →

Indirect evidence

“River Partners brings life back to rivers.”

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceJacksonville, FL, United StatesHQ checked Sep 19, 2026201-50070 contacts →

Indirect evidence

“The Lake Doctors, Inc.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceLos Gatos, CA, United StatesHQ checked Sep 19, 202651-20069 contacts →

Indirect evidence

“Since 1970, the highly-trained ecologists and professionals at H.”

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceBend, OR, United StatesHQ checked Sep 19, 202651-20065 contacts →

Indirect evidence

“SummitWest is an environmental consulting company that is home to a team of dynamic, solution-oriented thinkers.”

Source: RevenueBase Database · checked Sep 19, 2026
14Indirect evidencePortland, OR, United StatesHQ checked Sep 19, 202651-20058 contacts →

Indirect evidence

“The Freshwater Trust is focused on using insight to solve problems at the intersection of water and the economy.”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceSt. Petersburg, FL, United StatesHQ checked Sep 19, 202611-5052 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
16Indirect evidenceSeattle, WA, United StatesHQ checked Sep 19, 202651-20049 contacts →

Indirect evidence

“Natural Systems Design (NSD) is a team of scientists, engineers, and planners who are also farmers, fishermen and impassioned river people who have organized our lives to have a…”

Source: RevenueBase Database · checked Sep 19, 2026
17Strong evidenceColumbia, IL, United StatesHQ checked Sep 19, 202651-20049 contacts →

Strong evidence

“Naturion is a market leader in the wetland and stream mitigation industry providing high-quality ecological restoration for degraded ecosystems.”

Source: RevenueBase Database · checked Sep 19, 2026
18Strong evidenceSingapore, TX, United StatesHQ checked Sep 19, 202651-20047 contacts →

Strong evidence

“Imperative is a large-scale ecosystem restoration company.”

Source: RevenueBase Database · checked Sep 19, 2026
19Partial evidencePetaluma, CA, United StatesHQ checked Sep 19, 202651-20047 contacts →

Partial evidence

“Hanford is a licensed general engineering & landscape contractor specializing in ecological restoration & heavy civil construction in environmentally & culturally sensitive…”

Source: RevenueBase Database · checked Sep 19, 2026
20Strong evidenceForest Hill, MD, United StatesHQ checked Sep 19, 202651-20046 contacts →

Strong evidence

“Ecotone, Inc, a Maryland corporation founded in 1998, is one of few companies that provides full delivery ecosystem restoration services including, restoration design, consulting…”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceCorvallis, OR, United StatesHQ checked Sep 19, 202651-20044 contacts →

Indirect evidence

“The Institute for Applied Ecology is a non-profit 501(c)(3) organization founded in with a mission to conserve native species and habitats.”

Source: RevenueBase Database · checked Sep 19, 2026
22Indirect evidenceBrighton, MI, United StatesHQ checked Sep 19, 202611-5044 contacts →

Indirect evidence

“ASTI Environmental, a division of PEA Group, was founded in 1985 and provides a full range of environmental services to private developers, manufacturers, businesses, local units…”

Source: RevenueBase Database · checked Sep 19, 2026
23Partial evidenceLititz, PA, United StatesHQ checked Sep 19, 202611-5044 contacts →

Partial evidence

“LandStudies, a Davey Tree Company, is a design-build ecological restoration firm founded in 1989.”

Source: RevenueBase Database · checked Sep 19, 2026
24Strong evidenceTomball, TX, United StatesHQ checked Sep 19, 202611-5042 contacts →

Strong evidence

“EPR was created in 2012 to be a premier environmental planning and ecosystem restoration company.”

Source: RevenueBase Database · checked Sep 19, 2026
25Indirect evidenceTucson, AZ, United StatesHQ checked Sep 19, 202611-5041 contacts →

Indirect evidence

“GeoSystems Analysis, Inc.(GSA) has pioneered innovative solutions for industry and government since 1994.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 25 of 525 aquatic ecosystem restoration companies based in the United States

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Aquatic ecosystem restoration companies based in the United States at a glance

As of Sep 19, 2026
48.9%Verified-email coverage
11.8Average contacts per company
1-10Median size (employees)
1.5%Largest-city concentration · Portland
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
280
11-50
183
51-200
54
201-500
4
501-1,000
3
1,001-5,000
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 525 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 aquatic ecosystem restoration 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 the United States whose own description of what they do matches “aquatic ecosystem restoration 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 aquatic ecosystem restoration 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 aquatic ecosystem restoration companies, and records with no verified work email. Companies headquartered outside United States 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, 3,029 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.

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 aquatic ecosystem restoration 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 aquatic ecosystem restoration companies are there based in the United States?

RevenueBase identified 525 aquatic ecosystem restoration companies headquartered in the 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?

Resource Environmental Solutions LLC, headquartered in Bellaire, tops this list with the largest team on record.

Which city has the most aquatic ecosystem restoration companies?

Portland leads with 8 headquartered companies, followed by Seattle (7) and Baton Rouge (6).

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 3,029 verified decision-maker contacts tracked across these 525 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.