Company lists · Data refreshed September 2026

Top 25 Vehicle emission control companies based in the United States

RevenueBase identified 151 company matches for vehicle emission control companies associated with the United States as of September 2026 and tracks 4,530 professional contacts across them, including 1,134 with verified work emails. Tulsa is the largest hub.

This list covers company matches for vehicle emission control companies 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 22, 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 22, 2026 How this list was built
151Companies
4,530Contacts tracked
1,134Verified emails
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The 25 largest vehicle emission control companies based in the United States

Ranked by team size
Top 25 of 151 company matches for vehicle emission control companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchJacksonville, NC, United StatesHQ recorded Sep 22, 20261,001-5,000682 contacts →

Exact match

“Stanadyne is a global automotive technology leader in engine-based fuel and air management systems.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchConnersville, IN, United StatesHQ recorded Sep 22, 2026501-1,000582 contacts →

Exact match

“Stant’s tradition of innovation and quality began in 1898, when George Stant founded the company in Connersville, Indiana, USA.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchSan Antonio, TX, United StatesHQ recorded Sep 22, 2026201-500253 contacts →

Exact match

“Who we are Since 1994, EControls has delivered innovation and customer satisfaction to the engine and vehicle industries through: • State-of-the-art engine application…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchTulsa, OK, United StatesHQ recorded Sep 22, 2026501-1,000252 contacts →

Exact match

“MIRATECH is the global leader in emissions and acoustic control solutions for stationary natural gas and diesel engines, serving the power generation, oil and gas, data center…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchLincolnton, NC, United StatesHQ recorded Sep 22, 2026201-500199 contacts →

Exact match

“Cataler North America, a Toyota Motor Corporation affiliate, is a leading manufacturer of automotive catalysts that enhance the quality of the environment by filtering exhaust…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchGoldsboro, NC, United StatesHQ recorded Sep 22, 2026501-1,000126 contacts →

Exact match

“AP Emissions Technologies manufactures a complete line of automotive, light truck, and heavy-duty exhaust, and emissions products.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchBloomer, WI, United StatesHQ recorded Sep 22, 202651-20068 contacts →

Exact match

“Founded in 1950, Catalytic Combustion Corporation introduced industry-leading technology with the development of the first ever United States patented catalyst (U.S.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchDublin, GA, United StatesHQ recorded Sep 22, 202651-20055 contacts →

Exact match

“Dinex is a trusted global partner in advanced exhaust and emission technologies, bringing over 40 years of OEM experience directly to the North American heavy-duty aftermarket.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchKaukauna, WI, United StatesHQ recorded Sep 22, 202651-20054 contacts →

Exact match

“TANN Corporation designs and manufactures high-performance air pollution control systems built to meet the most demanding industrial applications.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchLong Beach, CA, United StatesHQ recorded Sep 22, 202611-5051 contacts →

Exact match

“STAX is an emerging leader in emissions reduction services.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Sep 22, 202651-20050 contacts →

Exact match

“Conifer Systems designs, manufactures and installs state-of-the-art emissions control systems and provides aftermarket services to enable industries to meet and exceed their…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchMontgomeryville, PA, United StatesHQ recorded Sep 22, 202651-20048 contacts →

Exact match

“ESW Group® was founded in 1998 as an R&D company with the goal to develop ceramic based catalytic converters for the automotive industry.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchAlpharetta, GA, United StatesHQ recorded Sep 22, 202651-20045 contacts →

Exact match

“Welcome to ENERVEX.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchNorthfield, MN, United StatesHQ recorded Sep 22, 202611-5043 contacts →

Exact match

“Advanced Exhaust Solutions is a premier supplier of exhaust gas silencers, piping and after-treatment components.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchAmerican Canyon, CA, United StatesHQ recorded Sep 22, 202611-5043 contacts →

Exact match

“EnviroCare International, Inc- A CECO Environmental Brand.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchBrea, CA, United StatesHQ recorded Sep 22, 202651-20038 contacts →

Exact match

“Since 1984, we have been designing, implementing, operating and servicing various types of motor vehicle emissions and technical/safety inspection programs.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchKaty, TX, United StatesHQ recorded Sep 22, 202651-20036 contacts →

Exact match

“Formed in 2010 and headquartered in Houston, Texas, Encino Environmental Services, LLC is an emissions testing, monitoring, and compliance support firm serving critical…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchFranklin, MA, United StatesHQ recorded Sep 22, 202611-5035 contacts →

Exact match

“Rypos is driven to address climate change through clean air technology.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchLebanon, PA, United StatesHQ recorded Sep 22, 202651-20032 contacts →

Exact match

“Announcement: MET will be adopting a telecommuting posture until further notice to maintain Covid-19 safety precautions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchOwosso, MI, United StatesHQ recorded Sep 22, 202651-20029 contacts →

Exact match

“Tri-Mer Corporation, established in 1960, specializes in comprehensive air pollution control solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchCoppell, TX, United StatesHQ recorded Sep 22, 202651-20026 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchSt. Louis, MO, United StatesHQ recorded Sep 22, 202611-5025 contacts →

Exact match

“Belco Technologies Corporation (BTC) is an Elessent Clean Technologies company specializing in emission control solutions for major oil refining processes.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchSanta Ana, CA, United StatesHQ recorded Sep 22, 202651-20024 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchRedding, CA, United StatesHQ recorded Sep 22, 202651-20023 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchLanghorne, PA, United StatesHQ recorded Sep 22, 202611-5021 contacts →

Exact match

“Eastern Catalytic manufactures catalytic converters, manifold converters, and converter components for the aftermarket and for original equipment manufacturers.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 151 vehicle emission control companies based in the United States

See the full list, filter by size, metro and specialty, and access 1,134 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Vehicle emission control companies based in the United States at a glance

As of Sep 22, 2026
25.0%Verified-email coverage
30.0Average contacts per company
11-50Median size (employees)
2.6%Largest-city concentration · Tulsa
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
57
11-50
54
51-200
26
201-500
7
501-1,000
4
1,001-5,000
2

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 151 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 “vehicle emission control companies” 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 1,134 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 22, 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 “vehicle emission control companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many vehicle emission control companies are there based in the United States?

RevenueBase identified 151 company matches for vehicle emission control companies 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?

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

Which city has the most vehicle emission control companies?

Tulsa leads with 4 company records, followed by Dallas (3) and Houston (3).

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 1,134 professional contacts with verified work emails tracked across these 151 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 22, 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.