Clean is the innovation space for those who develop and need to solve water and environmental challenges.
Clean is The Danish Water and Environmental Cluster and our vision is for Danish companies to be world leaders in the water and environmental field. We are the innovation space for both those who develop water and environmental solutions and those who need to solve water and environmental challenges.
The water and environmental technology sector
71.000 +
full-time jobs in the sector, of which 49,171 jobs in water and environmental technology companies
165,2 B
DKK 119.1 billion in turnover in the cluster, of which DKK 119.1 billion in water and environmental technology companies
57,4 B
DKK in exports, of which DKK 52.8 billion in water and environmental technology companies
3.7 %
of the whole Danish export comes from the water and enviornmental sector
9.700 +
scientific articles published regarding water and environmental technology from 2018 to 2023
839
water and environmental technology companies in Denmark
The Danish Water & Environmental Cluster
Clean membership
Innovation
You can expect concrete activities tailored to promote innovation in your company.
New markets
You can explore new markets and expand your company’s international presence.
Network
You’ll have the opportunity to meet your next customer, supplier, investor, or business partner.
Knowledge
As a member, you get access to unique research and the opportunity to shape the future of water and environmental technology knowledge.
Visibility
We showcase our members nationally and internationally and share your company’s success stories.
Projects
You’ll have access to a wide portfolio of projects in areas such as circular economy, water, waste and resources.
Latest news
All news
26. Feb 2026
Clean Insights report : When rain becomes a system challenge
25. Feb 2026
New Interreg project to pioneer stormwater solutions across borders
19. Feb 2026
Danish experience on a Korean scale
3. Feb 2026
New recruitment methods strengthen Danish companies’ access to international specialists
16. Jan 2026
5 key EU funding programmes: Has your project found the right fit?
2. Jan 2026
From idea to testing: Vibration sensor helps RUNI predict wear on expensive machine parts
18. Dec 2025
A new grant strengthens Danish water solutions and helps companies move from idea to market.
16. Dec 2025
How can the environmental health of the Baltic Sea be improved?
26. Nov 2025
Network on Carbon Removal and CCUS Strengthens Ties Through Delegation Trip in Denmark
25. Nov 2025
From methane to microplastics: 14 SMEs receive support to tackle concrete environmental challenges
20. Nov 2025
ReefCircular gains international dream partner: New collaboration with WSP is a direct result of Clean-funded pilot project
19. Nov 2025
No company can become circular on its own: more SMEs will develop solutions together through new value chain collaborations
17. Nov 2025
Clean at COP30: From Kalundborg to Belém
31. Oct 2025
Seaweed, Science and Solutions
29. Oct 2025
Shallow groundwater: From challenge to business opportunity for SMEs and startups
27. Oct 2025
British Water and Clean join forces to strengthen water sector collaboration
22. Oct 2025
Danish companies open doors in China
17. Oct 2025
Common challenges, common solutions – knowledge sharing between Denmark and Brazil
16. Oct 2025
Two years of collaborative work ending
10. Oct 2025
Climate adaptation in the border region with POSEIDON
7. Oct 2025
Rock Flour Company receives €6.1 million
29. Sep 2025
10 SMEs in new cross-border pilot projects
24. Sep 2025
PlastTrack at the 100% Climate Neutrality Conference – Making the invisible visible
15. Sep 2025
Industrial symbiosis: A Danish project from Clean inspires Brazil’s national strategy
Events
All events
2026
5. FEB–5. MAR
Beyond Beta: CleanTech acceleration for startups
Join Beyond Beta – Denmark’s largest acceleration program for water & environmental tech startups.
2026
27. FEB
CCUS Webinar: Building Horizon Europe Collaborations between Korea & Denmark (C2K findings)
Is your SMV interested in South Korea’s energy market, or…
2026
11. MAR
Track Micro and Nanoplastics
Micro and nanoplastics (MNPs), as fragments with dimensions less than a millimetre, have become a major global environmental issue in recent decades.…
2026
25. MAR
Understand the waste challenges in Aarhus
Workshop to co-create a roadmap for reducing plastic waste in Aarhus and the Baltic Sea region.
2026
14–16. APR
Open Call: Join Warsaw Pack 2026
Join Warsaw Pack 2026 together with SMEBeyond and explore packaging, logistics, and sustainability markets.
2026
28–29. APR
Join us at LOOP Forum 2026
Join LOOP Forum, the year’s most important event within the circular economy, waste, and resources!
2026
4–7. MAY
Exhibit at IFAT Munich 2026
Become part of Denmark’s joint presence at the world’s leading trade fair for water and environmental technologies.
2026
3–4. JUN
TechTour Water Tech 2026
International matchmaking event connecting startups with investors and experts in advanced water technology.
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