# List of environmental services companies in North America

Tamtam tracks 1,043 environmental services companies headquartered in North America. This list ranks the 100 largest by number of employees on LinkedIn, led by WSP, Jacobs and Amentum. Their median headcount is 4,633. Half of them were founded in 1945 or later. The most common headquarters are Washington (4), Boston (3) and Atlanta (2).

This selection of large environmental services companies in North America includes major players in waste management, engineering, and consulting. Firms like WM and Republic Services specialize in comprehensive waste and recycling solutions. WSP and Jacobs offer extensive engineering and advisory services across various sectors, including environment and infrastructure. Ecolab focuses on water, hygiene, and infection prevention solutions, while Clean Harbors provides hazardous waste management and emergency spill response.

The companies listed are primarily large corporations with diverse operations. A notable pattern is the concentration of headquarters in the United States, with a significant presence in Texas (Dallas, Houston) and Massachusetts (Boston, Norwell), alongside Montreal in Canada. This geographic spread reflects key economic hubs across North America.

🌍 North America · 100 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [WSP](https://www.tamtam.ai/c/wsp) (wsp.com)<br>Engineering, advisory, and science-based professional services for transport, infrastructure, property, environment, water, power, energy, and mining sectors across fifty countries globally. | Professional Services | 🇨🇦 Montreal | 71,968 |  |
| 2 | [Jacobs](https://www.tamtam.ai/c/jacobs) (jacobs.com)<br>Delivering outcomes and solutions for complex challenges in advanced manufacturing, cities, energy, environment, life sciences, transportation, and water, from advisory to lifecycle management. | Business Consulting and Services | 🇺🇸 Dallas | 68,461 | 1947 |
| 3 | [Amentum](https://www.tamtam.ai/c/amentum) (amentum.com)<br>Amentum is a global leader in engineering, project management, and solutions integration, specializing in modernizing critical missions worldwide with speed and confidence | Defense and Space Manufacturing | 🇺🇸 Chantilly | 50,000 |  |
| 4 | [Ecolab](https://www.tamtam.ai/c/ecolab) (ecolab.com)<br>A global leader providing water, hygiene, and infection prevention solutions for various industries worldwide through comprehensive services and personalized insights | Chemical Manufacturing | 🇺🇸 Saint Paul | 48,879 |  |
| 5 | [WM](https://www.tamtam.ai/c/wm) (wm.com)<br>Provides comprehensive waste collection, disposal, recycling, and renewable energy solutions tailored to municipal, commercial, industrial, and residential customers. | Environmental Services | 🇺🇸 Houston | 28,255 |  |
| 6 | [Tetra Tech](https://www.tamtam.ai/c/tetra-tech) (tetratech.com)<br>A global provider of consulting and engineering services, specializing in innovative technical solutions for water, environment, infrastructure, energy, and international development projects | Civil Engineering | 🇺🇸 Pasadena | 27,460 |  |
| 7 | [International Paper](https://www.tamtam.ai/c/international-paper) (internationalpaper.com)<br>Global company providing sustainable packaging solutions with operations in over 30 countries, employing 65,000 team members worldwide. | Paper and Forest Product Manufacturing | 🇺🇸 Memphis | 25,464 | 1898 |
| 8 | [Iron Mountain](https://www.tamtam.ai/c/iron-mountain) (ironmountain.com)<br>Global leader in storage and information management services, partnering with organizations worldwide to protect and unlock the value of their assets and data | IT Services and IT Consulting | 🇺🇸 Boston | 24,357 |  |
| 9 | [Goodwill Industries International](https://www.tamtam.ai/c/goodwill-industries-international) (goodwill.org)<br>nonprofit organization providing education, training, and career services to disadvantaged individuals and people with disabilities for empowerment. | Non-profit Organizations | 🇺🇸 Rockville | 24,004 | 1902 |
| 10 | [Republic Services](https://www.tamtam.ai/c/republic-services) (republicservices.com)<br>An industry leader in environmental services, providing innovative solutions for waste management, recycling, and sustainability to create cleaner and more sustainable communities | Environmental Services | 🇺🇸 Phoenix | 21,081 | 1998 |
| 11 | [GRUNDFOS](https://www.tamtam.ai/c/grundfos) (grundfos.to)<br>The company specializes in energy-efficient pumps that provide comfort, deliver water, remove wastewater, and support agriculture while striving for environmental protection | Industrial Machinery Manufacturing | 🇺🇸 Bjerringbro | 20,000 | 1945 |
| 12 | [Xylem](https://www.tamtam.ai/c/xylem) (xylem.com)<br>Global provider of advanced technologies and services focused on water and wastewater management, conservation, reuse, and environmental return. | Industrial Machinery Manufacturing | 🇺🇸 Washington | 19,290 |  |
| 13 | [Arca Continental](https://www.tamtam.ai/c/arca-continental) (arcacontal.com)<br>Produces, distributes, sells Coca-Cola beverages, and snacks in Mexico, Ecuador, Peru, Argentina, and the U.S. Company shares trade on the Mexican Stock Exchange. | Food and Beverage Services | 🇲🇽 Monterrey | 16,046 | 1926 |
| 14 | [U.S. Environmental Protection Agency- Pacific Southwest](https://www.tamtam.ai/c/us-environmental-protection-agency-epa) (epa.gov)<br>It protects human health and the environment by ensuring clean air, land, and water while enforcing federal environmental laws effectively. | Government Administration | 🇺🇸 Washington | 16,000 | 1970 |
| 15 | [Clean Harbors](https://www.tamtam.ai/c/clean-harbors) (cleanharbors.com)<br>Provider of hazardous waste management, emergency spill response, industrial cleaning, recycling, and used oil re-refining services across North America. | Environmental Services | 🇺🇸 Norwell | 13,449 | 1980 |
| 16 | [Nalco Water, An Ecolab Company](https://www.tamtam.ai/c/nalco-water-an-ecolab-company) (ecolab.com)<br>A global leader in water and process management solutions, leveraging connected chemistry and digital innovation to optimize sustainability and business outcomes | Chemical Manufacturing | 🇺🇸 Naperville | 12,751 |  |
| 17 | [SNC-Lavalin](https://www.tamtam.ai/c/snc-lavalin) (atkinsrealis.com)<br>Global engineering services and nuclear organization connecting people, data, and technology to transform infrastructure and energy systems worldwide. | Civil Engineering | 🇨🇦 Montreal | 11,913 |  |
| 18 | [Black & Veatch](https://www.tamtam.ai/c/black-and-veatch) (bv.com)<br>An employee-owned global leader in building critical human infrastructure in Energy, Water, Telecommunications, and Government Services since 1915 | Engineering Services | 🇺🇸 Overland Park | 11,691 | 1915 |
| 19 | [City of Seattle](https://www.tamtam.ai/c/city-of-seattle) (seattle.gov)<br>Providing diverse public services across multiple departments to support community well-being, infrastructure, and inclusive city development. | Government Administration | 🇺🇸 Seattle | 10,924 |  |
| 20 | [City of Calgary](https://www.tamtam.ai/c/city-of-calgary) (calgary.ca)<br>A public service organization in Calgary with a focus on making life better for residents through collaborative efforts and innovative practices | Government Administration | 🇨🇦 Calgary | 10,653 | 1894 |
| 21 | [Environment Agency](https://www.tamtam.ai/c/environment-agency) (gov.uk)<br>Protect environment across England by managing flood risks, supporting climate adaptation, conserving biodiversity, regulating pollution, and issuing environmental permits. | Environmental Services | 🇺🇸 Bristol | 10,381 | 1996 |
| 22 | [CMC](https://www.tamtam.ai/c/cmc) (cmc.com)<br>Focus on recruiting, developing, and supporting talented employees in the metals industry with an emphasis on safety and career growth. | Construction | 🇺🇸 Irving | 9,653 |  |
| 23 | [Metro](https://www.tamtam.ai/c/metro) (oregonmetro.gov)<br>Metro is a regional organization in Portland dedicated to parks, land, transportation, recycling, arts, and events, with a focus on diversity and inclusivity | Government Administration | 🇺🇸 Portland | 9,159 | 1979 |
| 24 | [Nucor Corporation](https://www.tamtam.ai/c/nucor-corporation) (nucor.com)<br>Manufacture steel products across North America, operate numerous steel mills, and lead in ferrous scrap recycling for sustainable steel production. | Manufacturing | 🇺🇸 Charlotte | 9,036 |  |
| 25 | [City of Austin](https://www.tamtam.ai/c/city-of-austin) (austintexas.gov)<br>Local government managing city employees, providing public services, promoting transparency, innovation, and maintaining high quality of life standards. | Government Administration | 🇺🇸 Austin | 8,954 | 1839 |
| 26 | [CDM Smith](https://www.tamtam.ai/c/cdm-smith) (cdmsmith.com)<br>This company provides comprehensive solutions in water, environment, transportation, energy, and facilities to worldwide public and private clients | Civil Engineering | 🇺🇸 Boston | 8,617 | 1947 |
| 27 | [GFL Environmental Inc.](https://www.tamtam.ai/c/gfl-environmental-inc) (gflenv.com)<br>A leading North American provider of environmental services for solid waste, liquid waste, and soil remediation, focusing on customer service, safety, and compliance | Environmental Services | 🇨🇦 Vaughan | 8,244 |  |
| 28 | [King County, WA](https://www.tamtam.ai/c/king-county-wa) (kingcounty.gov)<br>A leading Washington employer, transforming government operations to provide essential services to over 2 million residents #GoPublic | Government Administration | 🇺🇸 Seattle | 8,009 | 1852 |
| 29 | [TRC Companies, Inc.](https://www.tamtam.ai/c/trc-companies-inc) (trccompanies.com)<br>Providing advisory, consulting, construction, engineering, and management services to help clients adapt and achieve sustainable, impactful results. | Environmental Services | 🇺🇸 Windsor | 7,463 | 1969 |
| 30 | [The Nature Conservancy](https://www.tamtam.ai/c/the-nature-conservancy) (nature.org)<br>Protecting and conserving natural resources through science-based, community-driven efforts to ensure a sustainable future for all life. | Non-profit Organizations | 🇺🇸 Arlington | 7,441 | 1951 |
| 31 | [Novelis](https://www.tamtam.ai/c/novelis-atlanta) (novelis.com)<br>A global leader in producing flat-rolled aluminum products and recycling, providing innovative solutions to aerospace, automotive, beverage can, and specialty markets | Manufacturing | 🇺🇸 Atlanta | 7,411 |  |
| 32 | [SERVPRO](https://www.tamtam.ai/c/servpro) (servpro.com)<br>Leading fire and water cleanup and restoration company with over 2,000 franchises providing disaster recovery services nationwide. | Consumer Services | 🇺🇸 Gallatin | 7,178 | 1967 |
| 33 | [Fairfax County Government](https://www.tamtam.ai/c/fairfax-county-government) (fairfaxcounty.gov)<br>Fairfax County Government values ethics, transparency, and public service They offer a supportive work environment, competitive benefits, and opportunities for career growth | Government Administration | 🇺🇸 Fairfax | 7,098 | 1742 |
| 34 | [Environment and Climate Change Canada](https://www.tamtam.ai/c/environment-and-climate-change-canada) (canada.ca)<br>Inform Canadians on environmental protection, implement clean growth framework, collaborate with partners, conduct research, develop policies, enforce laws. | Government Administration | 🇨🇦 Gatineau | 6,865 | 1971 |
| 35 | [City of Dallas](https://www.tamtam.ai/c/city-of-dallas) (dallascityhall.com)<br>Local government providing public services, managing city operations, supporting community needs, and promoting values of empathy, ethics, excellence, and equity. | Government Administration | 🇺🇸 Dallas | 6,844 | 1841 |
| 36 | [Stericycle](https://www.tamtam.ai/c/stericycle) (linktr.ee)<br>A leading compliance company providing essential services for proper disposal of medical waste and confidential information, protecting client relationships and the environment | Hospitals and Health Care | 🇺🇸 Bannockburn | 6,777 |  |
| 37 | [Clarios](https://www.tamtam.ai/c/clarios) (clarios.com)<br>Global leader in advanced energy storage solutions, producing 150 million batteries annually for a third of the world's vehicles Expanding capacity to meet future demand | Motor Vehicle Parts Manufacturing | 🇺🇸 Glendale | 6,268 |  |
| 38 | [Abdul Latif Jameel](https://www.tamtam.ai/c/abdul-latif-jameel) (alj.com)<br>Global network of diversified businesses operating in mobility, energy, environmental services, financial services, health, real estate, logistics, retail, and media. | International Trade and Development | 🇺🇸 | 5,818 | 1945 |
| 39 | [Veolia \| North America](https://www.tamtam.ai/c/veolia-north-america) (veolianorthamerica.com)<br>Provides resource management solutions including water decontamination, toxic waste handling, fossil fuel alternatives, wastewater reuse, and battery recycling for cities and industries. | Environmental Services | 🇺🇸 Boston | 5,812 |  |
| 40 | [Asplundh Tree Expert, LLC](https://www.tamtam.ai/c/asplundh-tree-expert-llc) (asplundh.com)<br>A company specializing in safe and efficient line clearance services for utilities, as well as vegetation management for various industries | Environmental Services | 🇺🇸 Willow Grove | 5,645 | 1928 |
| 41 | [Salt River Project](https://www.tamtam.ai/c/salt-river-project) (srpnet.com)<br>Providing essential water and power services to the Phoenix area with a focus on customer satisfaction and innovative technology. | Utilities | 🇺🇸 Tempe | 5,372 | 1903 |
| 42 | [Waste Connections](https://www.tamtam.ai/c/waste-connections) (careers.wasteconnections.com)<br>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 | Environmental Services | 🇺🇸 Spring | 5,355 | 1997 |
| 43 | [Greif](https://www.tamtam.ai/c/greif) (greif.com)<br>A global leader in industrial packaging products and services, offering steel, plastic, and fibre drums, containers, containerboard, and specialty products | Packaging and Containers Manufacturing | 🇺🇸 Delaware | 5,352 | 1877 |
| 44 | [Cascades](https://www.tamtam.ai/c/cascades) (cascades.com)<br>Leading sustainable solutions provider for packaging, hygiene, and recovery needs with 75 production units in North America, prioritizing innovation and environmental well-being | Packaging and Containers Manufacturing | 🇨🇦 Kingsey Falls | 5,046 | 1964 |
| 45 | [Pratt Industries](https://www.tamtam.ai/c/pratt-industries) (linktr.ee)<br>Leading manufacturer of sustainable corrugated packaging and display solutions, with state-of-the-art facilities across 25 states and Mexico, focusing on environmental sustainability and recycling | Packaging and Containers Manufacturing | 🇺🇸 Conyers | 5,027 | 1987 |
| 46 | [Mullen Group Ltd.](https://www.tamtam.ai/c/mullen-group-ltd)<br>Provides logistics across North America including warehousing, truckload, and specialized hauling. Also offers services for energy, mining, forestry, and construction industries in western Canada. | Transportation, Logistics, Supply Chain and Storage | 🇨🇦 | 5,001 | 1949 |
| 47 | [Region of Peel](https://www.tamtam.ai/c/region-of-peel) (peelregion.ca)<br>A diverse and inclusive organization in Peel Region delivering social services and infrastructure for residents and businesses, fostering a Community for Life | Government Administration | 🇨🇦 Brampton | 4,959 | 1974 |
| 48 | [Los Angeles Department of Water and Power](https://www.tamtam.ai/c/los-angeles-department-of-water-and-power) (ladwp.com)<br>Provide safe, reliable water and electricity services to millions of residents and businesses in Los Angeles, ensuring municipal utility needs. | Utilities | 🇺🇸 Los Angeles | 4,862 | 1902 |
| 49 | [NCH](https://www.tamtam.ai/c/nch) (nch.com)<br>A global provider of industrial maintenance solutions, offering water cleaning, energy conservation, and maintenance products for commercial and industrial businesses worldwide | Chemical Manufacturing | 🇺🇸 Wilmington | 4,635 |  |
| 50 | [City Of Hamilton](https://www.tamtam.ai/c/city-of-hamilton) (hamilton.ca)<br>The organization aims to provide high-quality public services for a healthy, safe, and prosperous community while fostering collective ownership and diversity | Government Administration | 🇨🇦 Hamilton | 4,633 |  |
| 51 | [Hillsborough County](https://www.tamtam.ai/c/hillsborough-county) (hcfl.gov)<br>This company is the official LinkedIn page for Hillsborough County, Florida Government, providing information on programs, services, and events in the area | Government Administration | 🇺🇸 Tampa | 4,595 | 1834 |
| 52 | [SUEZ - Water Technologies & Solutions](https://www.tamtam.ai/c/suez-water-technologies-and-solutions) (watertechnologies.com)<br>Providing innovative solutions for industries, including water treatment and process optimization, to help businesses thrive and overcome challenges | Environmental Services | 🇺🇸 Trevose | 4,538 |  |
| 53 | [Steel Dynamics, Inc](https://www.tamtam.ai/c/steel-dynamics-inc) (stld.steeldynamics.com)<br>A leading US steel producer and metals recycler, offering a wide range of steel products, including sheet, structural steel, rail, and special-bar-quality steel | Manufacturing | 🇺🇸 Fort Wayne | 4,361 | 1993 |
| 54 | [City of Fort Worth](https://www.tamtam.ai/c/city-of-fort-worth) (fortworthtexas.gov)<br>Local government managing urban growth, preserving heritage, and promoting economic prosperity in a rapidly expanding city with over 900,000 residents. | Government Administration | 🇺🇸 Fort Worth | 4,249 | 1849 |
| 55 | [City of Brampton](https://www.tamtam.ai/c/city-of-brampton) (brampton.ca)<br>City with diverse cultures and innovative spirit focusing on technology, environmental innovation, and community-driven progress for residents and businesses. | Government Administration | 🇨🇦 Brampton | 4,240 |  |
| 56 | [BWXT](https://www.tamtam.ai/c/bwxt) (bwxt.com)<br>Manufacturing naval nuclear reactors, precision components, and fuel while providing environmental restoration, medical radioisotopes, and microreactor technology for defense and space applications. | Defense and Space Manufacturing | 🇺🇸 Lynchburg | 4,234 | 1867 |
| 57 | [Atlas](https://www.tamtam.ai/c/atlas) (oneatlas.com)<br>A nationwide provider of professional testing, inspection, engineering, environmental, and consulting services for public and private sector clients in various markets | Civil Engineering | 🇺🇸 Denver | 4,185 |  |
| 58 | [HAVI](https://www.tamtam.ai/c/havi) (havi.com)<br>A global company providing sourcing, supply chain solutions, digital analytics, marketing services, and consumer products to connect people with their favorite products worldwide | Holding Companies | 🇺🇸 Chicago | 4,160 | 1974 |
| 59 | [Gwinnett County Government](https://www.tamtam.ai/c/gwinnett-county-government) (gwinnettcounty.com)<br>Local government providing public safety, infrastructure, legal, community, and administrative services through multiple departments and elected officials. | Government Administration | 🇺🇸 Lawrenceville | 4,134 | 1818 |
| 60 | [Orange County Government](https://www.tamtam.ai/c/orange-county-government) (ocfl.net)<br>Serve citizens and guests with integrity, fairness, and professionalism while promoting transparency, accountability, and community involvement in governance. | Government Administration | 🇺🇸 Orlando | 4,015 | 1824 |
| 61 | [Wake County](https://www.tamtam.ai/c/wake-county) (wake.gov)<br>Local government providing tax collection, parks, libraries, planning, health, law enforcement, and administration for diverse urban and rural communities. | Government Administration | 🇺🇸 Raleigh | 3,908 | 1771 |
| 62 | [City of Columbus](https://www.tamtam.ai/c/city-of-columbus) (columbus.gov)<br>A government entity in Columbus, Ohio, working to provide high-quality services, support economic development, and maintain vibrant neighborhoods for residents | Government Administration | 🇺🇸 Columbus | 3,819 | 1812 |
| 63 | [York Region (The Regional Municipality of York)](https://www.tamtam.ai/c/york-region-the-regional-municipality-of-york) (york.ca)<br>The company provides services to 12 million residents, 54,000 businesses, and 650,000 employees in a two-tier government structure | Government Administration | 🇨🇦 Newmarket | 3,799 |  |
| 64 | [Hach](https://www.tamtam.ai/c/hach) (hach.com)<br>The company specializes in providing innovative solutions for water analysis globally, ensuring water quality through teamwork, customer partnerships, and reliable products | Environmental Services | 🇺🇸 Loveland | 3,646 |  |
| 65 | [Bureau of Reclamation](https://www.tamtam.ai/c/bureau-of-reclamation) (usbr.gov)<br>A key player in water resource management, providing irrigation water to farmers and delivering water to over 31 million people in the western states | Government Administration | 🇺🇸 Washington | 3,623 | 1902 |
| 66 | [City of Portland](https://www.tamtam.ai/c/city-of-portland) (portland.gov)<br>Municipal government in Portland, Oregon responsible for fire, police, water supply, urban planning, transportation, parks, and environmental resource management for the community | Government Administration | 🇺🇸 Portland | 3,567 | 1851 |
| 67 | [Harsco Corporation](https://www.tamtam.ai/c/harsco-corporation) (enviri.com)<br>Global provider of environmental waste management, recycling, onsite material processing, and rail infrastructure services across multiple industries and countries. | Environmental Services | 🇺🇸 Philadelphia | 3,553 | 1853 |
| 68 | [Fulton County Government](https://www.tamtam.ai/c/fulton-county-government) (fultoncountyga.gov)<br>The company's mission is to provide efficient service to residents and visitors, focusing on safety, health, self-sufficiency, economic opportunities, culture, and trust in government | Government Administration | 🇺🇸 Atlanta | 3,519 | 1853 |
| 69 | [City of Virginia Beach](https://www.tamtam.ai/c/city-of-virginia-beach) (virginiabeach.gov)<br>Largest Virginia city with diverse industries, scenic beaches, waterways, and vibrant community offering excellent living, working, and business opportunities. | Government Administration | 🇺🇸 Virginia Beach | 3,466 | 1963 |
| 70 | [Grupo DEACERO](https://www.tamtam.ai/c/grupo-deacero) (deacero.com)<br>Manufacturing steel, wire, and finished products, operating recycling centers, steel mills, and wire facilities globally with a focus on sustainable growth and advanced technology. | Primary Metal Manufacturing | 🇲🇽 San Pedro Garza García | 3,465 | 1952 |
| 71 | [South Lanarkshire Council](https://www.tamtam.ai/c/south-lanarkshire-council) (southlanarkshire.gov.uk)<br>Support economic growth, business development, and community well-being across diverse urban and rural areas within a key Scottish region. | Government Administration | 🇺🇸 Hamilton | 3,464 | 1996 |
| 72 | [City of Charlotte](https://www.tamtam.ai/c/city-of-charlotte) (charlottenc.gov)<br>Local government providing economic development, neighborhood improvement, transportation planning, and efficient management for over 870,000 residents. | Government Administration | 🇺🇸 Charlotte | 3,454 |  |
| 73 | [City of Long Beach](https://www.tamtam.ai/c/city-of-long-beach) (longbeach.gov)<br>The company is located in Long Beach, California, and is involved in various industries such as transportation, tourism, commerce, and oil operations | Government Administration | 🇺🇸 Long Beach | 3,423 |  |
| 74 | [BELFOR Property Restoration](https://www.tamtam.ai/c/belfor-property-restoration) (belfor.com)<br>Global property restoration and disaster recovery services specializing in fire, water, wind damage with customized emergency response and repair solutions. | Construction | 🇺🇸 Birmingham | 3,422 | 1946 |
| 75 | [American Water](https://www.tamtam.ai/c/american-water) (amwater.com)<br>Providing safe, clean, reliable, and affordable drinking water and wastewater services to over 14 million people across multiple states. | Utilities | 🇺🇸 Camden | 3,399 | 1886 |
| 76 | [Liberty](https://www.tamtam.ai/c/liberty) (jobs.libertyenergyandwater.com)<br>Provider of essential energy and water services, including clean, renewable power generation, with a focus on sustainability and customer satisfaction | Utilities | 🇨🇦 Oakville | 3,364 | 1988 |
| 77 | [City of Raleigh](https://www.tamtam.ai/c/city-of-raleigh) (raleighnc.gov)<br>A leading city in North Carolina known for innovation, education, and quality of life with diverse career opportunities for various professionals | Government Administration | 🇺🇸 Raleigh | 3,352 | 1792 |
| 78 | [CT Department of Energy and Environmental Protection](https://www.tamtam.ai/c/ct-department-of-energy-and-environmental-protection) (portal.ct.gov)<br>The organization is focused on conserving and protecting natural resources, improving air and water quality, and promoting clean, reliable energy in Connecticut | Government Administration | 🇺🇸 Hartford | 3,344 |  |
| 79 | [Golder](https://www.tamtam.ai/c/golder) (wsp.com)<br>A global engineering and consulting organization offering specialized services in earth, environment, and energy sectors, driven by technical excellence and innovation | Environmental Services | 🇨🇦 | 3,311 | 1960 |
| 80 | [County of Los Angeles Department of Public Works](https://www.tamtam.ai/c/county-of-los-angeles-department-of-public-works) (pw.lacounty.gov)<br>The organization plans, designs, constructs, and upkeeps modern infrastructure to enhance all communities within LA County | Civil Engineering | 🇺🇸 Alhambra | 3,303 | 1985 |
| 81 | [The Davey Tree Expert Company](https://www.tamtam.ai/c/the-davey-tree-expert-company) (davey.com)<br>The organization provides research-driven tree services, grounds maintenance, and environmental solutions for various partners, focusing on sustainability and exceeding client expectations | Environmental Services | 🇺🇸 Kent | 3,268 | 1880 |
| 82 | [Pace Analytical Services](https://www.tamtam.ai/c/pace-analytical-services) (pacelabs.com)<br>Provides analytical testing, laboratory data, and life sciences services to help businesses, industries, and governments make critical decisions for a safer, healthier world. | Environmental Services | 🇺🇸 Minneapolis | 3,184 |  |
| 83 | [Aqua](https://www.tamtam.ai/c/aqua) (aquawater.com)<br>Providing water and wastewater services to over 3 million people across multiple U.S. states with a focus on safety and integrity. | Utilities | 🇺🇸 Bryn Mawr | 3,174 |  |
| 84 | [Savannah River Nuclear Solutions](https://www.tamtam.ai/c/savannah-river-nuclear-solutions) (savannahrivernuclearsolutions.com)<br>A company responsible for managing and operating the Department of Energy's Savannah River Site in South Carolina, working with Newport News Nuclear and Honeywell | Government Relations Services | 🇺🇸 Aiken | 3,126 | 2008 |
| 85 | [Safety-Kleen](https://www.tamtam.ai/c/safety-kleen) (safety-kleen.com)<br>Leading environmental services company offering used oil recycling, parts cleaning, and other responsible solutions to protect customers and the environment | Environmental Services | 🇺🇸 Plano | 3,098 |  |
| 86 | [APTIM](https://www.tamtam.ai/c/aptim) (aptim.com)<br>A professional solutions firm specializing in environmental, sustainability, resilience, and infrastructure solutions for government agencies, commercial clients, and energy customers | Environmental Services | 🇺🇸 Baton Rouge | 3,077 |  |
| 87 | [ECC](https://www.tamtam.ai/c/ecc) (ecc.net)<br>An employee-owned construction and environmental company providing design-build, remediation, disaster recovery, energy, and international development solutions globally since 1985 | Construction | 🇺🇸 Burlingame | 3,009 | 1985 |
| 88 | [NYC Department of Environmental Protection (NYC DEP)](https://www.tamtam.ai/c/nyc-department-of-environmental-protection-nyc-dep) (nyc.gov)<br>This city agency manages New York City's water supply, distributing clean drinking water, treating wastewater, and regulating air quality and pollution | Environmental Services | 🇺🇸 Flushing | 3,005 |  |
| 89 | [City of Minneapolis](https://www.tamtam.ai/c/city-of-minneapolis) (minneapolismn.gov)<br>City governance focused on safety, equity, economic growth, environmental protection, and effective community engagement for residents' well-being. | Government Administration | 🇺🇸 Minneapolis | 2,774 | 1858 |
| 90 | [Darling Ingredients](https://www.tamtam.ai/c/darling-ingredients) (darlingii.com)<br>Transforms animal agriculture and food industry by-products into ingredients for nutrition, animal feed, crops, and renewable energy worldwide. | Manufacturing | 🇺🇸 Irving | 2,759 | 1882 |
| 91 | [EPCOR](https://www.tamtam.ai/c/epcor) (epcor.com)<br>Provider of essential services including clean water, electricity, drainage, and natural gas with a focus on sustainability and employee satisfaction | Utilities | 🇨🇦 Edmonton | 2,738 | 1891 |
| 92 | [City of Winnipeg](https://www.tamtam.ai/c/city-of-winnipeg) (winnipeg.ca)<br>Local government managing urban development, public services, and economic growth in a diverse, steadily growing Canadian city. | Government Administration | 🇨🇦 Winnipeg | 2,732 |  |
| 93 | [Cambridgeshire County Council](https://www.tamtam.ai/c/cambridgeshire-county-council) (cambridgeshire.gov.uk)<br>Local government focusing on sustainability, equality, and care by managing health, education, finance, and community services for residents. | Government Administration | 🇺🇸 Cambridge | 2,720 |  |
| 94 | [California Department of Water Resources](https://www.tamtam.ai/c/california-department-of-water-resources) (water.ca.gov)<br>This company oversees and manages California's water supply, including the State Water Project, while focusing on conservation, development, and sustainability | Government Administration | 🇺🇸 Sacramento | 2,703 | 1956 |
| 95 | [Evoqua Water Technologies](https://www.tamtam.ai/c/evoqua-water-technologies) (xylem.com)<br>A global leader in water solutions, specializing in water and wastewater management, conservation, and sustainability through innovative products and expertise | Environmental Services | 🇺🇸 Washington | 2,688 |  |
| 96 | [Kleinfelder](https://www.tamtam.ai/c/kleinfelder) (kleinfelder.com)<br>Engineering, science, and construction firm offering solutions for transportation, water, energy, and private infrastructure projects with a dedicated, cross-disciplinary team | Civil Engineering | 🇺🇸 San Diego | 2,656 |  |
| 97 | [Babcock & Wilcox](https://www.tamtam.ai/c/babcock-and-wilcox) (babcock.com)<br>A global leader in energy and environmental technologies and services for power, renewable, and industrial markets, with a history of over 150 years | Renewable Energy Power Generation | 🇺🇸 Akron | 2,627 | 1867 |
| 98 | [Durham Region (The Regional Municipality of Durham)](https://www.tamtam.ai/c/durham-region-the-regional-municipality-of-durham) (durham.ca)<br>Durham Region provides a wide range of services to a group of diverse communities, including paramedics, recycling, water supply, transit, and social programs | Government Administration | 🇨🇦 Whitby | 2,624 | 1974 |
| 99 | [Brown and Caldwell](https://www.tamtam.ai/c/brown-and-caldwell) (brownandcaldwell.com)<br>Privately-held environmental firm specializing in US water and environmental sectors Offering engineering, scientific, consulting, and construction services globally Passionate about innovation and service excellence | Environmental Services | 🇺🇸 Walnut Creek | 2,556 | 1947 |
| 100 | [Chesterfield County](https://www.tamtam.ai/c/chesterfield-county) (chesterfield.gov)<br>Local government providing public safety, health, recreation, cultural activities, community development, utilities, and public health services to residents. | Government Administration | 🇺🇸 | 2,501 |  |

## How this list is built

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 13, 2026.

## More company lists in North America

- [The largest companies in North America](https://www.tamtam.ai/l/largest-companies-in-north-america) (119,525)
- [Multinational companies in North America](https://www.tamtam.ai/l/multinational-companies-in-north-america) (18,655)
- [Manufacturers in North America](https://www.tamtam.ai/l/manufacturers-in-north-america) (10,136)
- [Education providers in North America](https://www.tamtam.ai/l/education-companies-in-north-america) (8,464)
- [Retail chains in North America](https://www.tamtam.ai/l/retail-chains-in-north-america) (8,233)
- [Financial services firms in North America](https://www.tamtam.ai/l/financial-services-firms-in-north-america) (7,767)
- [Companies with in-house R&D in North America](https://www.tamtam.ai/l/r-and-d-companies-in-north-america) (7,617)
- [Critical infrastructure operators in North America](https://www.tamtam.ai/l/critical-infrastructure-operators-in-north-america) (6,768)
- [Hardware manufacturers in North America](https://www.tamtam.ai/l/hardware-companies-in-north-america) (5,983)
- [Financial Services companies in North America](https://www.tamtam.ai/l/financial-services-companies-in-north-america) (5,618)
- [Public sector organisations in North America](https://www.tamtam.ai/l/public-sector-organisations-in-north-america) (5,042)
- [Higher Education companies in North America](https://www.tamtam.ai/l/higher-education-companies-in-north-america) (3,953)
- [Construction companies in North America](https://www.tamtam.ai/l/construction-companies-in-north-america) (3,792)
- [Energy companies in North America](https://www.tamtam.ai/l/energy-companies-in-north-america) (3,542)
- [Publicly traded companies in North America](https://www.tamtam.ai/l/publicly-traded-companies-in-north-america) (3,538)
- [Family-owned companies in North America](https://www.tamtam.ai/l/family-owned-companies-in-north-america) (3,387)
- [Corporate groups and holding companies in North America](https://www.tamtam.ai/l/holding-companies-in-north-america) (3,311)
- [Distributors and wholesalers in North America](https://www.tamtam.ai/l/distributors-and-wholesalers-in-north-america) (3,208)
- [Hotel and hospitality groups in North America](https://www.tamtam.ai/l/hospitality-groups-in-north-america) (3,149)
- [E-commerce companies in North America](https://www.tamtam.ai/l/ecommerce-companies-in-north-america) (2,944)
- [Logistics companies in North America](https://www.tamtam.ai/l/logistics-companies-in-north-america) (2,701)
- [Insurance companies in North America](https://www.tamtam.ai/l/insurance-companies-in-north-america) (2,622)
- [Government Administration companies in North America](https://www.tamtam.ai/l/government-administration-companies-in-north-america) (2,495)
- [Retail companies in North America](https://www.tamtam.ai/l/retail-companies-in-north-america) (2,407)

## The same list elsewhere

- [Environmental services companies in the world](https://www.tamtam.ai/l/environmental-services-companies-in-the-world) (4,213)
- [Environmental services companies in Mexico](https://www.tamtam.ai/l/environmental-services-companies-mexico) (28)

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Source: https://www.tamtam.ai/l/environmental-services-companies-in-north-america