# 33 leading environmental services companies in Lombardy

Tamtam tracks 33 environmental services companies headquartered in Lombardy. This list ranks all of them by number of employees on LinkedIn, led by Webuild, A2A and Italgas. Their median headcount is 309. Half of them were founded in 1998 or later. The most common headquarters are Milan (16) and Monza (2).

These companies in Lombardy primarily operate in environmental services, utilities, and construction, with a strong presence in industrial manufacturing and chemical sectors. The list includes established large and mid-sized firms. Webuild specializes in large-scale sustainable infrastructure, while A2A focuses on environment, water, and energy. Italgas is a network tech company for gas, water, and energy efficiency, and The SIAD Group is a chemical group involved in industrial gases and environmental management. Siram Veolia provides integrated energy efficiency and waste management, and De Nora is a multinational in electrochemistry and sustainable technologies.

The companies demonstrate a clear concentration of headquarters in Milan, highlighting the city's role as a central hub for environmental and infrastructure-related businesses in the region. Many of these firms, such as A2A, The SIAD Group, and Gruppo CAP, have long operational histories, indicating a mature and well-established industry landscape.

🇮🇹 Lombardy · 33 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Webuild](https://www.tamtam.ai/c/webuild) (webuildgroup.com)<br>A global leader in designing and constructing large, complex projects in sustainable mobility, hydropower, water infrastructure, and green buildings worldwide | Construction | 🇮🇹 Rozzano (MI) | 7,514 |  |
| 2 | [A2A](https://www.tamtam.ai/c/a2a) (gruppoa2a.it)<br>A company in Italy focused on environment, water, and energy, promoting circular economy and sustainable development goals through various services and operations | Utilities | 🇮🇹 Milan | 5,026 | 2008 |
| 3 | [Italgas](https://www.tamtam.ai/c/italgas) (italgas.it)<br>A leading Network Tech Company in gas, water, energy efficiency, and IT sectors, providing services to millions of customers in Italy and Greece | Utilities | 🇮🇹 Milan | 3,661 |  |
| 4 | [The SIAD Group](https://www.tamtam.ai/c/the-siad-group) (thesiadgroup.com)<br>A leading Italian chemical group offering industrial gases, engineering services, healthcare facilities, LPG and natural gas distribution, environmental management, and energy solutions | Chemical Manufacturing | 🇮🇹 Bergamo | 1,559 | 1927 |
| 5 | [Siram Veolia](https://www.tamtam.ai/c/siram-veolia) (veolia.it)<br>Provides integrated energy efficiency, water cycle management, and special waste services for public and private sectors to reduce emissions and resource waste. | Environmental Services | 🇮🇹 Milan | 1,497 |  |
| 6 | [De Nora](https://www.tamtam.ai/c/de-nora) (denora.com)<br>A multinational company specializing in electrochemistry and sustainable technologies, leading in industrial green hydrogen production, water treatment, and energy efficiency optimization | Industrial Machinery Manufacturing | 🇮🇹 Milan | 1,267 | 1923 |
| 7 | [Edison Next](https://www.tamtam.ai/c/edison-next) (edisonnext.it)<br>The company focuses on caring for customers and territories through eco-friendly and decarbonization solutions, promoting innovation and sustainable growth | Services for Renewable Energy | 🇮🇹 Milan | 1,170 |  |
| 8 | [MM Spa](https://www.tamtam.ai/c/mm-spa) (mmspa.eu)<br>An engineering company in Milan that designs Metro lines, manages the city's water service, public residential buildings, and green spaces | Utilities | 🇮🇹 Milan | 1,126 | 1955 |
| 9 | [Impregilo](https://www.tamtam.ai/c/impregilo) (webuildgroup.com)<br>Global construction group specializing in major public works, ranking first in water infrastructure projects Operating in 50+ countries with a century of expertise in complex projects | Construction | 🇮🇹 Milan | 703 |  |
| 10 | [ARPA Lombardia](https://www.tamtam.ai/c/arpa-lombardia) (arpalombardia.it)<br>The company works with regional and local institutions to prevent environmental pollution, monitor electromagnetic fields, and provide environmental education to citizens | Environmental Services | 🇮🇹 Milan | 685 | 2000 |
| 11 | [Eni Rewind](https://www.tamtam.ai/c/eni-rewind) (eni.com)<br>Eni Rewind utilizes Circular Economy principles to remediate and recover industrial land, water, and waste, creating value for local communities worldwide | Environmental Services | 🇮🇹 San Donato Milanese | 623 |  |
| 12 | [Gruppo CAP](https://www.tamtam.ai/c/gruppo-cap) (gruppocap.it)<br>This company manages the integrated water service in multiple areas, ensuring public control and transparency while investing in infrastructure and IT tools | Utilities | 🇮🇹 Milan | 464 | 1928 |
| 13 | [LabAnalysis](https://www.tamtam.ai/c/labanalysis) (labanalysis.it)<br>Laboratories providing analysis services in environmental, pharmaceutical, food, health, safety, agrochemicals Environmental monitoring, consultation, certifications, training in safety and health | Research Services | 🇮🇹 Casanova Lonati | 464 | 1976 |
| 14 | [SOCOTEC Italia](https://www.tamtam.ai/c/socotec-italia) (socotec.it)<br>Specializing in infrastructure inspections and tests, SOCOTEC Italia offers services in geotechnical surveys, structural monitoring, emissions control, and environmental analysis in Italy | Facilities Services | 🇮🇹 Lainate (MI) | 454 |  |
| 15 | [Amsa, Azienda Milanese Servizi Ambientali - Gruppo A2A](https://www.tamtam.ai/c/amsa-azienda-milanese-servizi-ambientali-gruppo-a2a) (amsa.it)<br>A company part of the A2A Group, providing a range of services in various sectors | Environmental Services | 🇮🇹 Milan | 424 |  |
| 16 | [Gruppo Acinque](https://www.tamtam.ai/c/gruppo-acinque) (gruppoacinque.it)<br>A leading multiutility company in various Italian regions specializes in designing smart, sustainable cities, energy transition, circular economy, waste management, and more | Utilities | 🇮🇹 Monza | 421 |  |
| 17 | [ITELYUM](https://www.tamtam.ai/c/itelyum) (itelyum.com)<br>A leading European company specializing in regenerating used oils, producing high-quality lubricant bases, diesel, and asphalt through innovative patented technology | Environmental Services | 🇮🇹 Pieve Fissiraga | 309 | 1963 |
| 18 | [Whitelab](https://www.tamtam.ai/c/whitelab-milan) (whitelab.it)<br>White Lab is a global network of specialized laboratories in Italy, providing quality and safety testing services for consumer goods, prioritizing customer satisfaction through tailored solutions | Biotechnology Research | 🇮🇹 Milan | 295 |  |
| 19 | [Alfa Varese \|Acquedotto \| Fognatura \| Depurazione](https://www.tamtam.ai/c/alfa-varese-acquedotto-fognatura-depurazione) (alfavarese.it)<br>Manages integrated water services for 144 municipalities in Varese province, covering water supply, distribution, sewerage, and wastewater treatment, returning it to the environment. | Utilities | 🇮🇹 Gallarate | 254 | 2016 |
| 20 | [ECONORD S.P.A.](https://www.tamtam.ai/c/econord-s-p-a) (econord.it)<br>The company specializes in environmental services, including waste treatment, recycling facilities, and biogas power plants, with a focus on sustainable practices and responsible management | Utilities | 🇮🇹 Varese | 218 |  |
| 21 | [Greenthesis Group](https://www.tamtam.ai/c/greenthesis-group) (greenthesisgroup.com)<br>A leading environmental group in Italy, specializing in green economy services such as waste management, biogas production, and environmental remediation | Environmental Services | 🇮🇹 Segrate | 188 | 1997 |
| 22 | [BrianzAcque](https://www.tamtam.ai/c/brianzacque) (brianzacque.it)<br>A public company providing integrated water services in Monza and Brianza Province, managing water supply, sewage, and purification with focus on sustainability and innovation | Utilities | 🇮🇹 Monza | 186 | 2003 |
| 23 | [Riva & Mariani Group S.p.a.](https://www.tamtam.ai/c/riva-and-mariani-group-s-p-a) (rivamariani.com)<br>An experienced multi-service company specializing in industrial plant design, construction, maintenance, insulation, scaffolding, asbestos removal, painting, and energy-saving Tipcheck assessments | Oil and Gas | 🇮🇹 Milan | 186 | 1937 |
| 24 | [Veolia \| Water Tech Italia](https://www.tamtam.ai/c/veolia-water-tech-italia) (veoliawatertechnologies.it)<br>A leading global provider of water treatment solutions for industrial and municipal sectors, offering innovative technologies and services backed by research and collaboration | Water, Waste, Steam, and Air Conditioning Services | 🇮🇹 Milan | 163 | 1853 |
| 25 | [CEM Ambiente - Servizi di igiene urbana](https://www.tamtam.ai/c/cem-ambiente-servizi-di-igiene-urbana) (cemambiente.it)<br>The company provides integrated waste management services for 70 municipalities, specializing in urban hygiene, waste treatment, recycling, and collection services | Environmental Services | 🇮🇹 Cavenago Brianza | 91 | 1973 |
| 26 | [3Bee](https://www.tamtam.ai/c/3bee) (3bee.com)<br>A naturetech company specializing in developing sensors, analysis tools, and regenerative activities for biodiversity monitoring and protection, promoting harmony between technology and nature | Environmental Services | 🇮🇹 Milan | 55 | 2017 |
| 27 | [Green Up \| Gestione rifiuti speciali e Servizi Ambientali](https://www.tamtam.ai/c/green-up-gestione-rifiuti-speciali-e-servizi-ambientali) (green-up.it)<br>Specialized in environmental services, the company manages waste collection, treatment, recovery, and disposal for businesses, focusing on reducing environmental impact | Environmental Services | 🇮🇹 Milan | 46 |  |
| 28 | [Tri-Mer Global Technologies](https://www.tamtam.ai/c/tri-mer-global-technologies) (industriousgt.com)<br>A technology leader in air pollution control, offering dry and wet solutions with complete turnkey project delivery and management | Industrial Machinery Manufacturing | 🇮🇹 Cassina de' Pecchi | 29 | 2018 |
| 29 | [ERP Italia Servizi](https://www.tamtam.ai/c/erp-italia-servizi) (erpitaliaservizi.it)<br>An authorized intermediary handling all types of waste nationwide, offering sustainable waste management solutions for businesses, focusing on recycling and circular economy principles | Environmental Services | 🇮🇹 Cassina de' Pecchi | 27 | 2014 |
| 30 | [Smaltimento Assistito](https://www.tamtam.ai/c/smaltimento-assistito) (smaltimentoassistito.it)<br>The company provides advanced waste management services focused on environmental responsibility, benefiting businesses, individuals, and the environment through conscious waste handling | Waste Treatment and Disposal | 🇮🇹 Sarezzo | 12 | 2012 |
| 31 | [Barcore](https://www.tamtam.ai/c/barcore) (barcore.it)<br>General contractor specializing in design, construction, and management of large building projects, renovations, flooring and cladding installation, waste treatment services | Construction | 🇮🇹 Rodengo Saiano | 11 | 1998 |
| 32 | [Cooperativa Sociale Betania Onlus](https://www.tamtam.ai/c/cooperativa-sociale-betania-onlus) (betania99.com)<br>The company is a social cooperative providing services in third-party transport, logistics, waste management, cleaning, green space maintenance, cemetery management, and personal assistance | Truck Transportation | 🇮🇹 Trezzano sul Naviglio | 8 |  |
| 33 | [Consorzio ecoR'it](https://www.tamtam.ai/c/consorzio-ecor-it) (ecorit.it)<br>A non-profit collective system specializing in proper management of electronic waste, focusing on reuse of materials and environmental preservation through certified partners | Environmental Services | 🇮🇹 Milan | 6 | 2005 |

## 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 12, 2026.

## More company lists in Lombardy

- [The largest companies in Lombardy](https://www.tamtam.ai/l/largest-companies-lombardy) (3,376)
- [Multinational companies in Lombardy](https://www.tamtam.ai/l/multinational-companies-lombardy) (889)
- [Manufacturers in Lombardy](https://www.tamtam.ai/l/manufacturers-lombardy) (512)
- [Companies with in-house R&D in Lombardy](https://www.tamtam.ai/l/r-and-d-companies-lombardy) (432)
- [Retail chains in Lombardy](https://www.tamtam.ai/l/retail-chains-lombardy) (429)
- [Financial services firms in Lombardy](https://www.tamtam.ai/l/financial-services-firms-lombardy) (262)
- [Corporate groups and holding companies in Lombardy](https://www.tamtam.ai/l/holding-companies-lombardy) (224)
- [Hardware manufacturers in Lombardy](https://www.tamtam.ai/l/hardware-companies-lombardy) (216)
- [Critical infrastructure operators in Lombardy](https://www.tamtam.ai/l/critical-infrastructure-operators-lombardy) (205)
- [IT services companies in Lombardy](https://www.tamtam.ai/l/it-services-companies-lombardy) (180)
- [Family-owned companies in Lombardy](https://www.tamtam.ai/l/family-owned-companies-lombardy) (171)
- [Consumer goods companies in Lombardy](https://www.tamtam.ai/l/consumer-goods-companies-lombardy) (168)
- [Retail Apparel and Fashion companies in Lombardy](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-lombardy) (167)
- [Professional services firms in Lombardy](https://www.tamtam.ai/l/professional-services-firms-lombardy) (162)
- [Luxury brands in Lombardy](https://www.tamtam.ai/l/luxury-brands-lombardy) (158)
- [IT Services and IT Consulting companies in Lombardy](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-lombardy) (155)
- [Software Development companies in Lombardy](https://www.tamtam.ai/l/software-development-companies-lombardy) (155)
- [Financial Services companies in Lombardy](https://www.tamtam.ai/l/financial-services-companies-lombardy) (154)
- [E-commerce companies in Lombardy](https://www.tamtam.ai/l/ecommerce-companies-lombardy) (150)
- [Companies with a mobile app in Lombardy](https://www.tamtam.ai/l/companies-with-mobile-app-lombardy) (137)
- [Personal Care Product Manufacturing companies in Lombardy](https://www.tamtam.ai/l/personal-care-product-manufacturing-companies-lombardy) (137)
- [Transportation, Logistics, Supply Chain and Storage companies in Lombardy](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-lombardy) (135)
- [Consulting firms in Lombardy](https://www.tamtam.ai/l/consulting-firms-lombardy) (134)
- [SaaS companies in Lombardy](https://www.tamtam.ai/l/saas-companies-lombardy) (125)

## 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 Europe](https://www.tamtam.ai/l/environmental-services-companies-in-europe) (2,448)

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