# 30 leading environmental services companies in the Yvelines department

Tamtam tracks 35 environmental services companies headquartered in the Yvelines department. This list ranks the 30 largest by number of employees on LinkedIn, led by SEPUR, CULLIGAN FRANCE and Grand Paris Seine & Oise. Their median headcount is 78. Half of them were founded in 2002 or later. The most common headquarters are Guyancourt (4), Versailles (3) and Rambouillet (2).

These Yvelines-based companies specialize in environmental services, civil engineering, and public administration. They range from established firms like SEPUR, focusing on waste management since 1965, and CULLIGAN FRANCE, a water treatment specialist, to newer entities such as Demcy, founded in 2021 for asbestos removal and demolition, and Grand Paris Seine & Oise, managing urban and rural development.

A notable pattern is the strong presence of environmental services, with companies like IGIENAIR, active in indoor air quality, and STEREAU, providing water treatment engineering. Guyancourt appears as a common headquarters location, hosting Egis en France and Ecologic France.

🇫🇷 Yvelines · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SEPUR](https://www.tamtam.ai/c/sepur) (sepur.com)<br>With over 50 years of expertise, the company specializes in waste management and cleaning services for communities, including waste collection, recycling, and green waste processing | Environmental Services | 🇫🇷 Thiverval-Grignon | 937 | 1965 |
| 2 | [CULLIGAN FRANCE](https://www.tamtam.ai/c/culligan-france) (culligan.fr)<br>Specialist in water treatment providing softeners, purifiers, and water fountains for homes, businesses, and communities ensuring quality water. | Consumer Services | 🇫🇷 Versailles | 862 |  |
| 3 | [Grand Paris Seine & Oise](https://www.tamtam.ai/c/grand-paris-seine-and-oise) (gpseo.fr)<br>management of a large urban and rural territory focusing on economic sectors, innovation, infrastructure, environment, and public services organization | Government Administration | 🇫🇷 Aubergenville | 429 | 2016 |
| 4 | [Egis en France](https://www.tamtam.ai/c/egis-en-france) (egis-group.com)<br>International consulting, construction engineering, and mobility services company. Designs and operates smart infrastructure and buildings addressing climate challenges for balanced and sustainable territorial development. | Civil Engineering | 🇫🇷 Guyancourt | 349 |  |
| 5 | [Riva Acier](https://www.tamtam.ai/c/riva-acier) (rivaacier.com)<br>Over 45 years experience, seven industrial sites in France, leading steel long products manufacturer and largest scrap metal recycler in France. | Primary Metal Manufacturing | 🇫🇷 Gargenville | 312 | 1976 |
| 6 | [IGIENAIR](https://www.tamtam.ai/c/igienair) (igienair.com)<br>Specializing in Indoor Air Quality, IGIENAIR offers services for air purification and control, along with monitoring tools for commercial spaces worldwide | Environmental Services | 🇫🇷 Achères | 272 | 2003 |
| 7 | [Bouygues Construction Expertises Nucléaires](https://www.tamtam.ai/c/bouygues-construction-expertises-nucleaires)<br>Offers integrated, innovative, high-value solutions globally, covering all technical fields and the complete life cycle of nuclear infrastructure, including engineering, maintenance, and dismantling. | Civil Engineering | 🇫🇷 Guyancourt | 254 |  |
| 8 | [CTP environnement group](https://www.tamtam.ai/c/ctp-environnement-group) (ctp-environnement.com)<br>Innovative company specializing in technical industrial cleaning, heat exchanger treatment, sludge, and liquid effluent treatment with multiple branches worldwide | Environmental Services | 🇫🇷 Conflans-Sainte-Honorine | 195 | 1926 |
| 9 | [Demcy](https://www.tamtam.ai/c/demcy) (eiffage-demcy.com)<br>A company specializing in asbestos removal and demolition of buildings and infrastructure, offering selective equipment removal, material recycling, and nationwide presence | Civil Engineering | 🇫🇷 Velizy-Villacoublay | 159 | 2021 |
| 10 | [STEREAU](https://www.tamtam.ai/c/stereau)<br>The company specializes in engineering solutions for water treatment, focusing on efficiency, performance, innovation, and sustainability to preserve water resources for future generations | Environmental Services | 🇫🇷 Maurepas | 154 | 1959 |
| 11 | [Ecologic France](https://www.tamtam.ai/c/ecologic-france) (ecologic-france.com)<br>Manages prevention, collection, and recycling of end-of-life electrical/electronic equipment, sports/leisure items, and DIY/gardening tools, fostering a circular economy. | Environmental Services | 🇫🇷 Guyancourt | 147 | 2005 |
| 12 | [SRBG](https://www.tamtam.ai/c/srbg) (srbg.fr)<br>Specializing in public works, the company constructs road infrastructures, urban and landscape developments, as well as water projects for VINCI Group | Construction | 🇫🇷 Saint-Germain-en-Laye | 140 | 1979 |
| 13 | [SOINS MODERNES DES ARBRES SMDA](https://www.tamtam.ai/c/soins-modernes-des-arbres-smda) (smda-sas.com)<br>Specialized in ecological maintenance and management of parks and gardens, serving private clients and public authorities nationwide with environmental respect. | Environmental Services | 🇫🇷 Trappes | 131 | 1984 |
| 14 | [Printerre Groupe](https://www.tamtam.ai/c/printerre-groupe) (printerre.fr)<br>Specialized in IT asset disposal, data erasure, equipment reconditioning, consumable remanufacturing, and distribution, promoting digital decarbonation and employment inclusion. | Computer Hardware Manufacturing | 🇫🇷 Vernouillet | 86 | 2007 |
| 15 | [CASGBS - Communauté d'agglomération Saint Germain Boucles de Seine](https://www.tamtam.ai/c/casgbs-communaute-d-agglomeration-saint-germain-boucles-de-seine) (saintgermainbouclesdeseine.fr)<br>Join a dynamic intercommunal organization near Paris, dedicated to innovation in active mobility, environment, economic development, and more for the benefit of its diverse population | Government Administration | 🇫🇷 Le Pecq | 78 | 2016 |
| 16 | [Communauté d'agglomération Rambouillet Territoires](https://www.tamtam.ai/c/communaute-d-agglomeration-rambouillet-territoires) (rt78.fr)<br>Management of community space, economic growth, infrastructure, environment, culture, sports, generational actions, sanitation, and sustainable development across 36 communes. | Government Administration | 🇫🇷 Rambouillet | 76 | 2004 |
| 17 | [Sitreva](https://www.tamtam.ai/c/sitreva) (sitreva.fr)<br>A syndicate managing waste treatment and disposal for its members in France, operating waste collection services and recycling centers | Government Administration | 🇫🇷 Rambouillet | 51 | 1994 |
| 18 | [Options Solutions](https://www.tamtam.ai/c/options-solutions) (options-solutions.fr)<br>Provides reusable container supply, collection, and washing services to eliminate packaging and consumption waste in food service and retail sectors. | Environmental Services | 🇫🇷 Les Mureaux | 43 | 2021 |
| 19 | [APTIMA](https://www.tamtam.ai/c/aptima) (aptima.fr)<br>The company focuses on promoting social solidarity and sustainable practices through activities like recycling, reselling goods, and providing job opportunities | Environmental Services | 🇫🇷 Mantes-la-Jolie | 32 | 1983 |
| 20 | [VIDEAL 78 ◽ Entreprise Adaptée - Collecte, Recyclage, Réemploi des déchets en entreprise](https://www.tamtam.ai/c/videal-78-entreprise-adaptee-collecte-recyclage-reemploi-des-dechets-en) (videal78-apr2.fr)<br>A company specializing in sustainable recycling of electronic waste, employing disabled individuals, and developing innovative technology for plastic recycling and eco-friendly practices | Environmental Services | 🇫🇷 Bonnières-sur-Seine | 32 | 2002 |
| 21 | [Urbasense](https://www.tamtam.ai/c/urbasense) (urbasense.fr)<br>Urbasense provides agronomic plant monitoring services using connected sensors to ensure reliable plantations, quality control, and minimal water consumption for plant development | Environmental Services | 🇫🇷 Versailles | 26 | 2015 |
| 22 | [SETHY](https://www.tamtam.ai/c/sethy) (sethy.fr)<br>Environmental company specializing in river projects and natural habitat management Part of VINCI Construction group, focusing on civil engineering, marine works, and ecological engineering | Civil Engineering | 🇫🇷 Élancourt | 26 |  |
| 23 | [COHIN ENVIRONNEMENT](https://www.tamtam.ai/c/cohin-environnement) (cohin-environnement.com)<br>Designs and builds wastewater treatment plants and systems for industrial and municipal needs, including renovation and compliance, offering turnkey installations and a patented biological treatment process. | Water Supply and Irrigation Systems | 🇫🇷 Versailles | 25 | 1990 |
| 24 | [PROTERRA ENVIRONNEMENT](https://www.tamtam.ai/c/proterra-environnement) (proterra-environnement.com)<br>The company specializes in applying geomembrane sealing devices for various types of ponds, non-hazardous waste storage cells, and implementing floating covers. | Environmental Services | 🇫🇷 Trappes | 22 | 2000 |
| 25 | [PHILAQUA](https://www.tamtam.ai/c/philaqua) (philaqua.com)<br>Growing company with professional team specializing in water network treatment for commercial, industrial, healthcare, residential, and municipal sectors | Renewable Energy Semiconductor Manufacturing | 🇫🇷 Conflans-Sainte-Honorine | 21 | 2017 |
| 26 | [CATS ECOFLUIDE](https://www.tamtam.ai/c/cats-ecofluide) (ecofluide.com)<br>Design and implementation of custom oil filtration systems considering application type, oil characteristics, flow rate, maintenance cost, ROI, lifespan, and environmental protection. | Industrial Machinery Manufacturing | 🇫🇷 Sartrouville | 21 | 1979 |
| 27 | [APH Environnement Services](https://www.tamtam.ai/c/aph-environnement-services) (aphservices.fr)<br>Specializing in sanitation services since 2005, offering maintenance, emergency response, TV inspection, compliance work, and civil engineering in the Paris region | Environmental Services | 🇫🇷 Croissy-sur-Seine | 16 | 2005 |
| 28 | [MANEXI DIAGNOSTICS](https://www.tamtam.ai/c/manexi-diagnostics) (manexi.com)<br>Technical consulting firm specializing in construction pollutant management, offering diagnostics, advice, and performance measurement for various building types and project stages. | Construction | 🇫🇷 Velizy-Villacoublay | 14 | 1993 |
| 29 | [ATI-Environnement](https://www.tamtam.ai/c/ati-environnement) (ati-environnement.fr)<br>Specializing in studying and cleaning polluted sites and soil, this company in the Paris region focuses on environmental and anticorrosion projects nationwide with a small team | Environmental Services | 🇫🇷 Bois d'Arcy | 9 | 1989 |
| 30 | [Afleya](https://www.tamtam.ai/c/afleya) (afleya.com)<br>Afleya specializes in managing and enhancing construction materials to promote environmental sustainability in the building sector through training, consulting, and a diagnostic app | Construction | 🇫🇷 Guyancourt | 9 | 2019 |

## 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 11, 2026.

## More company lists in the Yvelines department

- [The largest companies in the Yvelines department](https://www.tamtam.ai/l/largest-companies-yvelines) (1,469)
- [Multinational companies in the Yvelines department](https://www.tamtam.ai/l/multinational-companies-yvelines) (226)
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- [Aerospace and defence companies in the Yvelines department](https://www.tamtam.ai/l/aerospace-and-defense-companies-yvelines) (65)
- [Public sector organisations in the Yvelines department](https://www.tamtam.ai/l/public-sector-organisations-yvelines) (65)
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- [Automotive manufacturers and suppliers in the Yvelines department](https://www.tamtam.ai/l/automotive-companies-yvelines) (49)
- [Motor Vehicle Manufacturing companies in the Yvelines department](https://www.tamtam.ai/l/motor-vehicle-manufacturing-companies-yvelines) (49)
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- [Industrial Machinery Manufacturing companies in the Yvelines department](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-yvelines) (43)
- [Critical infrastructure operators in the Yvelines department](https://www.tamtam.ai/l/critical-infrastructure-operators-yvelines) (41)
- [Family-owned companies in the Yvelines department](https://www.tamtam.ai/l/family-owned-companies-yvelines) (36)

## The same list elsewhere in France

- [Environmental services companies in Île-de-France](https://www.tamtam.ai/l/environmental-services-companies-ile-de-france) (336)
- [Environmental services companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/environmental-services-companies-auvergne-rhone-alpes) (173)
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- [Environmental services companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/environmental-services-companies-nouvelle-aquitaine) (92)
- [Environmental services companies in Hauts-de-France](https://www.tamtam.ai/l/environmental-services-companies-hauts-de-france) (87)
- [Environmental services companies in Occitanie](https://www.tamtam.ai/l/environmental-services-companies-occitanie) (78)
- [Environmental services companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/environmental-services-companies-hauts-de-seine) (70)
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- [Environmental services companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/environmental-services-companies-bouches-du-rhone) (60)
- [Environmental services companies in Pays de la Loire](https://www.tamtam.ai/l/environmental-services-companies-pays-de-la-loire) (59)
- [Environmental services companies in Brittany](https://www.tamtam.ai/l/environmental-services-companies-brittany) (48)
- [Environmental services companies in the Nord department](https://www.tamtam.ai/l/environmental-services-companies-nord) (47)
- [Environmental services companies in Normandy](https://www.tamtam.ai/l/environmental-services-companies-normandy) (45)
- [Environmental services companies in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/environmental-services-companies-bourgogne-franche-comte) (38)
- [Environmental services companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/environmental-services-companies-seine-saint-denis) (34)
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- [Environmental services companies in the Essonne department](https://www.tamtam.ai/l/environmental-services-companies-essonne) (27)
- [Environmental services companies in the Val-de-Marne department](https://www.tamtam.ai/l/environmental-services-companies-val-de-marne) (26)
- [Environmental services companies in the Isère department](https://www.tamtam.ai/l/environmental-services-companies-isere) (25)
- [Environmental services companies in Paris](https://www.tamtam.ai/l/environmental-services-companies-paris-france) (87)

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Source: https://www.tamtam.ai/l/environmental-services-companies-yvelines