Company lists · Data refreshed November 2026

Top 25 Phase 1 esa providers worldwide

RevenueBase identified 166 company matches for phase 1 esa providers worldwide as of November 2026 and tracks 1,010 professional contacts across them, including 343 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for phase 1 esa providers worldwide, 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 November 6, 2026. Country and city lists for phase 1 esa providers follow the table.

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 Nov 6, 2026 How this list was built
166Companies
1,010Contacts tracked
343Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest phase 1 esa providers worldwide

Ranked by team size
Top 25 of 166 company matches for phase 1 esa providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchWichita, GA, United StatesHQ recorded Nov 6, 202651-20080 contacts →

Exact match

“iSi provides environmental, health and safety facility support services to a wide variety of industries across the U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchBridgewater, NJ, United StatesHQ recorded Nov 6, 202651-20074 contacts →

Exact match

“Summit is a trusted leader in environmental industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchToronto, ON, CanadaHQ recorded Nov 6, 202651-20061 contacts →

Exact match

“ERIS is a leading provider of detailed environmental property risk research.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBrighton, MI, United StatesHQ recorded Nov 6, 202611-5044 contacts →

Exact match

“As part of PEA Group, ASTI Environmental helps clients turn environmental and ecological challenges into opportunities, combining technical expertise with creative problem-solving…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchMontreal, QC, CanadaHQ recorded Nov 6, 202651-20044 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchRichardson, TX, United StatesHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“Founded in 1982, AR Consultants, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLawrenceville, GA, United StatesHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“A.C.T.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchPreston, United KingdomHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“Proudly part of AQA Group Home of the All-Inclusive EPA model.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchKansas City, CA, United StatesHQ recorded Nov 6, 202611-5019 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchIndianapolis, IN, United StatesHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Founded in 1995, Mundell & Associates, Inc.(Mundell) is an earth and environmental services consulting company providing quantitative site characterization and remedial services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchDallas, TX, United StatesHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“EnviroPhase is an environmental consulting firm serving clients in commercial and industrial property, development and banking.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchThe Woodlands, TX, United StatesHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“Environmental Performance, Inc.(EPI) is an environmental consulting firm helping its clients with their real estate related environmental needs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSan Juan Capistrano, CA, United StatesHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“VCS Environmental is now part of ALL4.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSouth Bend, IN, United StatesHQ recorded Nov 6, 20261-1011 contacts →

Exact match

“Environmental consultants and remediation services, nationwide service.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchAnaheim, CA, United StatesHQ recorded Nov 6, 202611-5011 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchNyköping, SwedenHQ recorded Nov 6, 20261-1010 contacts →

Exact match

“Vi kan miljöundersökningar.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchUnited StatesHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Troy Risk provides services in several areas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchRaleigh, NC, United StatesHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Axiom Environmental, Inc, based in Raleigh, North Carolina, provides environmental services throughout the eastern US with experience in the Carolinas, Georgia, Louisiana…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchFort Collins, CO, United StatesHQ recorded Nov 6, 20261-109 contacts →

Exact match

“Since 1975, National Inspection Services has provided peace of mind for those buying, selling, or holding commercial real estate.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchCalgary, AB, CanadaHQ recorded Nov 6, 20261-108 contacts →

Exact match

“Ballast Environmental is a team of diverse scientists passionate about the natural world around us.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchHatfield, PA, United KingdomHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Penn's Trail Environmental, LLC is a multi-disciplinary Environmental Consulting firm serving Pennsylvania and Maryland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSalt Lake City, UT, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBabylon Village, NY, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Located in New York, Castleton Environmental remains at the forefront of the ever-evolving field of environmental risk management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchKettering, OH, United StatesHQ recorded Nov 6, 20261-106 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchPortsmouth, NH, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“INDEPENDENT ARCHAEOLOGICAL CONSULTING, LLC is an environmental services company based out of 97 MORNING STREET, PORTSMOUTH, New Hampshire, United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 166 phase 1 esa providers worldwide

See the full list, filter by size, metro and specialty, and access 343 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Phase 1 esa providers worldwide at a glance

As of Nov 6, 2026
34.0%Verified-email coverage
6.1Average contacts per company
1-10Median size (employees)
2.4%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
111
11-50
43
51-200
10

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for phase 1 esa providers are linked below.
What qualifies
Company records worldwide whose business descriptions match “phase 1 esa providers” 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. 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 343 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 November 6, 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.

Phase 1 esa providers by location

1 lists · largest first

Every Phase 1 esa providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “phase 1 esa providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many phase 1 esa providers are there worldwide?

RevenueBase identified 166 company matches for phase 1 esa providers worldwide as of November 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?

ISI Environmental tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most phase 1 esa providers?

The United States leads with 102 companies. Every phase 1 esa providers list by country and city is linked on this page.

Which city has the most phase 1 esa providers?

Houston leads with 4 company records, followed by Toronto (3) and Austin (2).

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 343 professional contacts with verified work emails tracked across these 166 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 November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 166 phase 1 esa providers worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.