Company lists · Data verified August 2026

Top 25 Environmental accounting firms based in the United States

Name: Environmental accounting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 312 companies tracked

There are 312 environmental accounting firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 3,677 professional contacts across them, including 1,548 with verified work emails and 1,610 with mobile numbers. Houston is the largest hub.

This list covers environmental accounting firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

312Companies

3,677Contacts tracked

1,548Verified emails

1,610Mobile numbers

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The 25 largest environmental accounting firms based in the United States

Ranked by team size

Top 25 of 312 environmental accounting firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	APPL	Clovis, CA	n/a	232	1
2	Keramida INC	Chicago, IL	51-200	150	104
3	Quest Resource Management Group, A Qrhc Company Nasdaq Qrhc	The Colony, TX	51-200	149	96
4	Mostardi Platt	Mendota Heights, MN	51-200	137	24
5	PPM Consultants, INC	Monroe, LA	51-200	120	74
6	Cascadia Consulting Group	Oakland, CA	51-200	108	74
7	Techlaw	Chantilly, VA	201-500	106	37
8	Hart & Hickman, PC	Raleigh, NC	51-200	101	71
9	Chambers Group, INC	Costa Mesa, CA	51-200	98	32
10	A-Tech Consulting, INC	Orange, CA	51-200	96	62
11	AKT Peerless	Cheshire, CT	51-200	95	72
12	Aarc Environmental	Atlanta Atlanta, GA	51-200	63	39
13	LEW Environmental	New York, NY	51-200	60	17
14	3r Sustainability	Pittsburgh, PA	11-50	55	21
15	Spheros Environmental	Lakewood, CO	201-500	48	28
16	Aeterra, LLC	Boston, MA	11-50	43	38
17	Sustainable Solutions Corporation	Royersford, PA	11-50	43	23
18	Techlaw Consultants, INC	Chantilly, VA	201-500	42	25
19	Sesco Group	Indianapolis, IN	11-50	40	19
20	Peak Environmental, A Nova Group, GBC Company	St Louis Park, MN	11-50	38	15
21	Soundearth Strategies, INC	Tacoma, WA	11-50	33	22
22	Governance & Accountability Institute, INC	New York, NY	11-50	32	14
23	Enviroforensics	Indianapolis, IN	51-200	30	23
24	VMX International	Detroit, MI	51-200	30	10
25	Davenport Engineering, INC	Torrance, CA	11-50	29	24

Showing 25 of 312 environmental accounting firms based in the United States

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Environmental accounting firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

HoustonLargest hub · 12 HQs

1,610Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

182

11-50

103

51-200

201-500

Environmental accounting firms by metro

Metro	Companies
Environmental accounting firms in Houston	12
Environmental accounting firms in Austin	6
Environmental accounting firms in San Francisco	6
Environmental accounting firms in Chicago	5
Environmental accounting firms in Indianapolis	5
Environmental accounting firms in Dallas	5
Environmental accounting firms in Seattle	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental accounting firms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental accounting firms are there based in the United States?

There are 312 environmental accounting firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

APPL, headquartered in Clovis, tops this list with the largest team on record.

Which city has the most environmental accounting firms?

Houston leads with 12 headquartered companies, followed by Austin (6) and San Francisco (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 1,548 verified decision-maker contacts tracked across these 312 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.