Company lists · Data refreshed September 2026

Top 25 Water and wetland protection organizations based in the United States

RevenueBase identified 299 company matches for water and wetland protection organizations associated with the United States as of September 2026 and tracks 3,847 professional contacts across them, including 1,546 with verified work emails. Washington is the largest hub.

This list covers company matches for water and wetland protection organizations associated with the 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 19, 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 19, 2026 How this list was built
299Companies
3,847Contacts tracked
1,546Verified emails
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The 25 largest water and wetland protection organizations based in the United States

Ranked by team size
Top 25 of 299 company matches for water and wetland protection organizations based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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 matchWashington, DC, United StatesHQ recorded Sep 19, 202651-200366 contacts →

Exact match

“Since our founding during the campaign to pass the landmark Clean Water Act in 1972, Clean Water Action has worked to win strong health and environmental protections by bringing…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchWashington, DC, United StatesHQ recorded Sep 19, 202651-200147 contacts →

Exact match

“American Rivers protects wild rivers, restores damaged rivers, and conserves clean water for people and nature.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchNaples, FL, United StatesHQ recorded Sep 19, 202651-200114 contacts →

Exact match

“The Conservancy of Southwest Florida was founded in 1964 by a small group of concerned citizens fighting to protect the beauty and quality of life in the region.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchMillersville, MD, United StatesHQ recorded Sep 19, 2026201-500101 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchChico, CA, United StatesHQ recorded Sep 19, 202651-20081 contacts →

Exact match

“River Partners brings life back to rivers.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchNew Haven, CT, United StatesHQ recorded Sep 19, 202611-5074 contacts →

Exact match

“Save the Sound leads environmental action across Connecticut, Westchester, NYC, and Long Island.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchWeston, MA, United StatesHQ recorded Sep 19, 202651-20072 contacts →

Exact match

“The Conservation Department is responsible for the day to day operation of the Conservation Commission.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchFort Lauderdale, FL, United StatesHQ recorded Sep 19, 202651-20071 contacts →

Exact match

“Save the Water™ (STW™) is a U.S-based nonprofit organization dedicated to water quality research.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchPortland, OR, United StatesHQ recorded Sep 19, 202651-20058 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchOssining, NY, United StatesHQ recorded Sep 19, 202611-5054 contacts →

Exact match

“Riverkeeper is a member-supported watchdog organization dedicated to defending the Hudson River and its tributaries and protecting the drinking water supply of more than 9.5…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchPennington, NJ, United StatesHQ recorded Sep 19, 202611-5051 contacts →

Exact match

“Keeping water clean, safe and healthy is the heart of our mission.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchNew York, NY, United StatesHQ recorded Sep 19, 202611-5048 contacts →

Exact match

“The Waterkeeper movement was started by a band of blue-collar fishermen on New York’s Hudson River in 1966.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchWalton, NY, United StatesHQ recorded Sep 19, 202611-5042 contacts →

Exact match

“The Watershed Agricultural Council partners with hundreds of farm and forest landowners in the New York City Watershed region to ensure their lands stay within a working context.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5041 contacts →

Exact match

“BlueGreen Water Technologies is restoring, safeguarding, and optimizing waterbodies worldwide, protecting ecosystems, wildlife, and communities while supporting sustainable…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchColumbus, OH, United StatesHQ recorded Sep 19, 202611-5041 contacts →

Exact match

“The mission of the Ohio Environmental Council (OEC) is to secure healthy air, land, and water for all who call Ohio home.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchCoral Gables, FL, United StatesHQ recorded Sep 19, 202611-5039 contacts →

Exact match

“Protect the water you love.#MiamiWaterkeeper Miami Waterkeeper protects South Florida’s waters by advocating for resilient solutions grounded in science, rooted in nature, and…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchPittsburgh, PA, United StatesHQ recorded Sep 19, 202611-5038 contacts →

Exact match

“The Pennsylvania Environmental Council (PEC) protects and restores the natural and built environments through innovation, collaboration, education and advocacy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchSanta Fe, NM, United StatesHQ recorded Sep 19, 202611-5037 contacts →

Exact match

“We work to protect and restore wildlife, wild places, wild rivers and health of the American West.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchSt. Paul, MN, United StatesHQ recorded Sep 19, 202611-5036 contacts →

Exact match

“Great River Greening inspires, engages and leads local communities in conserving and caring for the land and water that enrich our lives.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchEmmaus, PA, United StatesHQ recorded Sep 19, 202611-5035 contacts →

Exact match

“Our Mission: Protect and restore critical natural areas and waterways and educate the community to create a legacy of a healthy, sustainable environment for future generations.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchBuffalo, NY, United StatesHQ recorded Sep 19, 202611-5034 contacts →

Exact match

“Buffalo Niagara WATERKEEPER’s mission is to protect and restore our water and surrounding ecosystems for the benefit of current and future generations.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchNewport, NC, United StatesHQ recorded Sep 19, 202611-5034 contacts →

Exact match

“The North Carolina Coastal Federation is a nonprofit organization dedicated to protecting and restoring the coast of North Carolina through programs that: keep the public informed…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchGreenfield, MA, United StatesHQ recorded Sep 19, 2026n/a33 contacts →

Exact match

“Since 1952, CRC has been the voice for the Connecticut River watershed, from source to sea.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchFountain Valley, CA, United StatesHQ recorded Sep 19, 2026n/a31 contacts →

Exact match

“The National Water Research Institute (NWRI) is a science-oriented 501c3 nonprofit that has sponsored projects and programs since 1991 to improve water quality, protect public…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchFulton, MD, United StatesHQ recorded Sep 19, 202611-5031 contacts →

Exact match

“The Center for Watershed Protection works to advance clean water resources and healthy ecosystems through responsible land and water management.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 299 water and wetland protection organizations based in the United States

See the full list, filter by size, metro and specialty, and access 1,546 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water and wetland protection organizations based in the United States at a glance

As of Sep 19, 2026
40.2%Verified-email coverage
12.9Average contacts per company
1-10Median size (employees)
3.3%Largest-city concentration · Washington
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
209
11-50
67
51-200
17
201-500
3
10001+
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 299 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 the United States whose business descriptions match “water and wetland protection organizations” 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 1,546 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 19, 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 “water and wetland protection organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water and wetland protection organizations are there based in the United States?

RevenueBase identified 299 company matches for water and wetland protection organizations associated with the 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?

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

Which city has the most water and wetland protection organizations?

Washington leads with 10 company records, followed by Portland (8) and Seattle (8).

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 1,546 professional contacts with verified work emails tracked across these 299 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 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 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.