This selection of large environmental services companies in Texas includes firms specializing in waste management, environmental consulting, and industrial maintenance. Among them, WM provides comprehensive waste collection and recycling, while Waste Connections offers solid waste collection and disposal. Safety-Kleen focuses on used oil recycling and parts cleaning, and Trinity Consultants delivers regulatory compliance and ecological services.
The companies listed are primarily large enterprises, with WM having over 28,000 employees and Waste Connections over 5,000. A notable pattern is the concentration of headquarters in the Houston area, with seven of the top fifteen companies based there, indicating a regional hub for environmental services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 28,255 | ||||
| 2 |
Waste Connectionscareers.wasteconnections.com
Integrated services company providing solid waste collection, transfer, disposal, and recycling services in the US and Canada with a focus on employee empowerment and community impact |
5,355 | |||
| 3 |
Safety-Kleensafety-kleen.com
Leading environmental services company offering used oil recycling, parts cleaning, and other responsible solutions to protect customers and the environment |
3,098 | |||
| 4 |
Texas Commission on Environmental Qualitytceq.texas.gov
Environmental agency in Texas with a focus on clean air, clean water, and waste management, striving for sustainable economic development and public participation |
2,659 | |||
| 5 |
Trinity Consultantstrinityconsultants.com
A global EH&S firm offering services in regulatory compliance, ecology, water, built environments, and life sciences since 1974 |
2,195 | |||
| 6 |
ALS Life Sciencesalsglobal.com
A global company offers testing, inspection, certification, and verification services, along with state-of-the-art technical solutions for efficient, socially responsible business operations |
1,954 | |||
| 7 |
FCC Environmental Servicesfccenvironmental.com
An award-winning leader in environmental services providing waste and recycling solutions to households and commercial customers, transforming waste into resources |
948 | |||
| 8 |
CECO Environmental Corporationcecoenviro.com
A global industrial company specializing in environmentally focused solutions for air quality, energy optimization, and custom engineered applications across various markets |
885 | |||
| 9 |
HydroChemPSChpc-industrial.com
HydroChemPSC provides specialty maintenance services and technology solutions to critical energy infrastructure in the US, emphasizing safety, efficiency, and environmental compliance |
717 | |||
| 10 |
ALS - North America, Environmentalalsglobal.com
ALS provides a wide range of environmental analytical testing services worldwide for soil, water, air, and biota, with expertise in specialty testing areas |
713 | |||
| 11 |
Resource Environmental Solutions LLCres.us
An industry leader in nature-based solutions, specializing in environmental mitigation, stormwater management, and resilient natural infrastructure projects for communities nationwide |
654 | |||
| 12 |
Ambipar | United Statesambipar.com
The company specializes in crisis and emergency management, helping organizations prepare for and navigate unexpected events to minimize disruption and ensure resilience |
632 | |||
| 13 |
VLS Environmental Solutions, LLCvlses.com
Sustainable solutions for waste management and compliance, promoting efficiency and sustainability while building trust with communities and government agencies |
546 | |||
| 14 |
BakerCorpunitedrentals.com
A market leader in tank, pump, filtration, and shoring equipment rentals, providing high-quality industrial equipment to customers in various industries globally |
544 | |||
| 15 |
Evergreen North America Industrial Servicesevergreenindustrialservices.com
Provides comprehensive industrial and environmental services, including cleaning, waste management, vapor control, and specialized technical solutions for various industrial plants and sites. |
537 | |||
| 16 |
Trinity River Authority of Texastrinityra.org
This organization promotes conservation and development of natural resources in the Trinity River basin for the benefit of Texans |
496 | |||
| 17 |
HydroChem LLChpc-industrial.com
Innovative industrial cleaning company focused on technology and safety to deliver superior results, with a commitment to exceeding customer expectations |
490 | |||
| 18 |
Liquid Environmental Solutionsliquidenviro.com
Leading US company specializing in non-hazardous liquid waste collection and disposal, ensuring regulatory compliance and environmental protection for various industries nationwide |
486 | |||
| 19 |
Texas Disposal Systemstexasdisposal.com
An award-winning resource management company founded in 1977, TDS offers landfill, recycling, composting, and other environmental solutions across Texas |
444 | |||
| 20 |
TCEQ Compliance Service
The company offers underground storage tank and line testing services, surpassing EPA and TCEQ regulations, providing detailed reports for compliance |
411 | |||
| 21 |
Cimarroncimarron.com
A technology-driven company providing emissions management solutions for the global energy industry, reducing emissions, optimizing operations, ensuring compliance, and driving sustainability |
391 | |||
| 22 |
Hydromax USAhydromaxusa.com
Hydromax USA provides advanced field services and solutions to empower utilities in optimizing infrastructure investments and improving safety, sustainability, and reliability |
356 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 23 |
Texas A&M Forest Servicetfsweb.tamu.edu
Conserving and protecting Texas' resources, Texas A&M Forest Service helps property owners maintain forests, manage natural resources, and respond to disasters |
349 | |||
| 24 |
Continental Carbonic Products - A MATHESON Companycontinentalcarbonic.com
Specializing in manufacturing and distributing dry ice, the company serves various industries nationwide, offering services such as dry ice blasting and temperature control |
340 | |||
| 25 |
AdvantaCleanadvantaclean.com
Established in 1994, this franchise network specializes in mold remediation, water damage mitigation, air duct cleaning, fire damage remediation, and sanitization services |
247 | |||
| 26 |
Anew Climateanewclimate.com
Bluesource provides guidance to organizations on achieving climate and environmental goals through their full-service climate and energy action services |
227 | |||
| 27 |
Envent Corporationenventcorporation.com
Industry leader in environmental services for petrochemical industry, offering refinery turnaround services, degassing, emission control, water treatment, and more with the largest fleet in North America |
183 | |||
| 28 |
CheckSammychecksammy.com
A waste removal company offering same-day pickup nationwide at fixed rates, focusing on sustainability, data analytics, and personalized service |
171 | |||
| 29 |
R360 Environmental Solutions, LLCr360environmentalsolutions.com
Leading provider of oilfield waste management solutions across major US oil and gas exploration regions, headquartered in Texas with facilities in six states |
171 | |||
| 30 |
Brazos River Authoritybrazos.org
A government entity managing water resources for the Brazos River basin, providing water supply, treatment, quality monitoring, and conservation programs |
169 | |||
| 31 | 162 | ||||
| 32 |
Gulf Coast Authority
Regional waste management company in Texas offering environmentally-friendly solutions, wastewater treatment services, and bond financing programs for industry and municipalities |
159 | |||
| 33 |
Milestone Environmentalmilestone-es.com
Leading environmental services company specializing in carbon management, sequestering hydrocarbon waste underground to reduce greenhouse gas emissions and protect the environment |
154 | |||
| 34 |
GSE Environmentalsolmax.com
Global geosynthetics manufacturer protecting the environment by creating innovative solutions for mining, petroleum, waste management, water, and civil engineering industries worldwide |
153 | |||
| 35 |
Waste Control Specialistswcstexas.com
Comprehensive solution for treatment, storage, and disposal of low-level radioactive waste, hazardous waste, and byproduct materials, providing full-service radioactive waste services nationwide |
151 | |||
| 36 |
Quest Resource Management Group, a QRHC Company (NASDAQ:QRHC)questrmg.com
A full-service environmental consulting and management company specializing in sustainability programs, recycling solutions, and customized environmental protection for various industries |
149 | |||
| 37 |
Ensolum, LLCensolum.com
The company combines sustainable environmental solutions with innovative technologies to help clients achieve a competitive advantage while balancing economic resources and environmental challenges |
141 | |||
| 38 |
ClimeCoclimeco.com
Providing customized sustainability and decarbonization solutions through collaboration with organizations, governments, and markets to maximize environmental impact and brand value. |
93 | |||
| 39 |
Sector 7 Energysector7energy.com
Energy consulting firm with a customer-centric approach, offering services such as energy procurement, bill auditing, tax exemptions, retail energy brokering, and more across multiple locations |
45 | |||
| 40 |
NEXTiiMnextiim.com
Experts in technical building management and digital solutions, assisting clients with operational optimization, asset valorization, and energy efficiency for a greener real estate. |
33 | |||
| 41 |
Biota - opérateur de projets biodiversitébiota.fr
Offers environmental services to companies and local authorities, in cooperation with local farmers, including biodiversity protection, ecological engineering, agroecology, and reforestation. |
24 | |||
| 42 |
Energywareâ„¢energywarellc.com
Specializing in energy efficiency, this company offers turn-key engineering and design services on a national scale to support a green journey |
19 | |||
| 43 |
Mandrill Energy Solutionsmandrillenergy.com
Provider of sustainable environmental and energy services, with 50+ years of experience, offering cost-efficient solutions to diverse businesses' infrastructure and energy needs |
10 | |||
| 44 |
Terrapassterrapass.com
A team fighting climate change, Terrapass helps companies and individuals understand and reduce their carbon footprint, taking responsibility for their impact |
8 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 14, 2026.
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