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Water Knowledge Europe
2025-05-15 | Warsaw, Poland
Water Knowledge Europe BlueDeal 2025, combined with the Blue Deal Conference, under the patronage of the EU Presidency, represents a critical juncture for shaping the future of water in Europe and beyond. This event will run over three days, providing an opportunity to tackle urgent water challenges at a time when water resilience, security, and sustainability are becoming central to both European and global policy agendas. Within ongoing global geopolitical tensions, this set of events take on added significance, as Europe seeks to reinforce its global competitiveness and sustainability efforts.

IWA Resource Recovery Cluster Conference
2025-05-19 - 2025-05-23 | Leeuwarden, Netherlands
This event is organized by Wetsus in collaboration with Delft University of Technology and Wageningen University and Research. With this conference, we want to showcase and celebrate the experiences, lessons and results of more than 15 years of experimenting and upscaling of resource recovery around the world.
Now it is time to transform these from concepts to business examples. Resource recovery is a very inspiring topic but has not been an easy journey and many lessons have been learned in both upscaling novel technologies and developing new markets. Our ambition is to make this conference a meeting point between academia and industry to ensure that research and industry can learn and inspire each other, thus working towards scaled-up and impactful solutions.

Congress Water Smart Economy & Society
2025-05-25 - 2025-05-28 | Rotterdam, The Netherlands
We are excited to announce the Congress Water Smart Economy & Society, where leading experts, innovators, and stakeholders will gather to discuss the future of water management.
From urban environments to desalination and industrial applications, explore cutting-edge innovations that will shape the circular water economy.
With contributions from over 30 case studies across Europe and beyond, this event will showcase real-world results of co-creation, stakeholder engagement, and policy reform.
Hear from both academia and industry on the latest advancements in resource recovery, desalination, and wastewater treatment.

11th Microbial Ecology and Water Engineering (MEWE) Conference: Managing Water Microbiomes
2025-06-02 - 2025-06-05 | Atlanta, Georgia, USA
Microbiological information is being generated faster than it can be translated into actionable knowledge. Systematic and quantitative applications of ecological theory and engineering design to advance microbiome engineering against a rapidly evolving methodological landscape is challenging. While this challenge is not unique to the water engineering field, the ecological, environmental, and economic context of the water sector sets our community apart. The thematic motivation of the MEWE 11 conference is to shine a light on the MEWE communities’ successes and challenges in the application of ecological theory and engineering design to manage microbiomes, including biofilms, in the water sector. The conference sub-themes will also place a spotlight on the importance of translational efforts that extend the impact of MEWE research on the water industry and public health.

Pi 2025 – 10th IWA Conference Benchmarking, Performance Assessment and Regulation of Water Services
2025-06-08 - 2025-06-11 | Poznan, Poland
The IWA Benchmarking and Performance Assessment Specialist Group (SG BPA) presents and discusses benchmarking- and performance assessment experiences and -projects around the world. Since 2007, this series of PI-conferences is a traditional, biennial forum to exchange ideas and methodologies. The next edition, PI2025, will take place in Poznan 8 – 10 June and is co- organised by Poznan University of Technology and Aquanet (Poznan water utility) New in PI2025 will be performance assessment in regulatory frameworks and novel topics such as how to measure sustainability in the water sector and other aspects related to a water sector in transition.

Source Separated Sanitation Summit 2025
2025-06-11 - 2025-06-13 | Helsinborg, Sweden.
The Source Separated Sanitation Summit 2025 is a continuation of the seminar held in Helsingborg ten years ago. Back then, the focus was on gathering knowledge. This time, it is about showcasing concrete examples of operational source-separated wastewater systems – European Practices.
The conference takes a comprehensive approach to the subject, highlighting both technical aspects, experiences from living labs, and the user perspective. It will conclude with a debate on the short- and long-term development of source-separated sanitation in Europe and its future role.

European Wastewater Management Conference & Exhibition
2025-06-17 - 2025-06-18 | Telford, United Kingdom
Europe’s leading wastewater conference sharing operational experience and practical solutions. The European Wastewater Management Conference provides an essential annual update on the latest innovations, best practice, cutting-edge technology and research in the wastewater sector.

7th IWA International Conference on eco-Technologies for Wastewater Treatment
2025-06-23 - 2025-06-26 | Stockholm, Sweden
The conference aims to bring together researchers from different disciplines, technology providers, consulting engineering firms, utilities and other relevant societal actors to jointly discuss and explore the latest findings on processes, methods, and technologies for innovative solutions in a Water-Wise World.

International Congress AEDyR 2025
2025-06-24 - 2025-06-26 | Tenerife, Spain
The Spanish Association for Desalination and Reuse (AEDyR) will hold its XIV International Congress ‘60 years of innovation in desalination and reuse’ on June 24, 25 and 26, 2025 in Tenerife. It will commemorate the 60 years of desalination in Spain and, among other issues, will analyse the technological development that has led our country and Spanish companies to be a benchmark in desalination and reuse in the world.
The congress, which is held every two years, will bring together national and international experts in desalination, reuse and water treatment from companies throughout the sector’s value chain, public institutions, universities and research centres in the Canary Islands city with the aim of promoting collaboration and the exchange of knowledge and experiences. The latest research, innovations and technological advances related to these techniques for harnessing water resources will be presented.

14th IWA Specialist Group for Instrumentation, Control, and Automation (ICA)
2025-06-30 - 2025-07-02 | Oslo, Norway
ICA2024 will provide an international forum to exchange knowledge, methodologies, and experience on all aspects of ICA for water/ wastewater treatment and transport. Specific topics of the conference will include but not limited to sensors and instrumentation systems, online monitoring and control, modelling and simulation, early warning, information systems, decision support, risk assessment, big data, internet of things and smart water systems.

12th International Water Association Symposium on Waste Management Problems in Agro-Industries
2025-09-10 - 2025-09-12 | Istanbul, Turkey
The “12th IWA International Symposium on Waste Management Problems in Agro-Industries” will be held in İstanbul, Türkiye (Turkey), a fascinating historical city, for the first time in many years. The event will be organized by Prof. Işık Kabdaşlı and Prof. Taku Fujiwara, who will serve as co-chairs. The IWA Agro-Symposia has made a substantial impact, offering a valuable platform for the dissemination of knowledge on cutting-edge scientific and technical solutions and fostering a comprehensive network of experts in the field.

CS4Water Conference 2025
2025-09-13 - 2025-09-18 | Delft, The Netherlands
Join us for the inaugural Citizen Science 4 Water (CS4Water) Conference that will be held 3-5 June 2025 in Delft, the Netherlands. The conference will focus on the crucial role citizen science plays within water resource monitoring, management and governance as well as community-led actions. Together, we will explore how citizen science can help us achieve the Sustainable Development Goals (SDGs) around the world and future-proof healthy water bodies for generations to come.
For this inaugural CS4Water conference, we will focus on freshwater systems, diving into engaging workshop sessions, exploring innovative research, and connecting international water and citizen science experts.

IWA Membrane Technology Conference 2025
2025-09-13 - 2025-09-18 | Daegu, South Korea
More details to come.

13th Urban Drainage Modelling Conference
2025-09-15 - 2025-09-19 | Innsbruck, Austria
The UDM Conference seeks to create a forum for deep discussion and exchange of ideas amongst technical experts including engineers, scientists, professionals and academics. The UDM Conference brings focus to the data and models needed to develop better understanding and advance the management of the urban drainage system (e.g., water quality and quantity, urban flooding and modelling, urban flood forecasting and risk analysis, modelling tools, data etc.).

WEFTEC 2025
2025-09-27 - 2025-10-01 | McCormick, Chicago, Illinois
Join a community of innovators, experts, and leaders at WEFTEC!
WEFTEC, the Water Environment Federation’s Technical Exhibition and Conference, is the largest annual water quality exhibition in North America and offers water quality professionals the best water quality education and training available.

Open Living Lab Days 2025
2025-09-30 - 2025-10-03 | Andorra La Vella, Andorra
OpenLivingLab Days is the flagship annual event organized by the European Network of Living Labs (ENoLL). It is the global gathering of international Living Labs that brings together living labbers, public officials, corporate leaders, entrepreneurs, academics, and innovators from around the world. The event offers a unique platform for networking, exchanging best practices, and collaborating on cutting-edge projects and for reflecting on the latest trends and how to shape the regenerative future.
The 2025 edition of the OpenLivingLab Days will take place in Andorra la Vella, Andorra, from 30 September – 3 October 2025. This year, we are embracing a truly unique setting—an entire country as a Living Lab! Andorra itself will serve as a dynamic testing ground for innovation, making this edition unlike any before. We are happy to co-organize this event with the Andorra Research and Innovation Foundation, the host of Andorra Living Lab.

10th IWA-ASPIRE Conference and Water New Zealand Conference & Exhibition
2025-10-20 - 2025-10-24 | Auckland, New Zealand
In an innovative departure from business as usual, the International Water Association (IWA) is joining forces with Water New Zealand to create an event that combines IWA-ASPIRE 2025 with the annual Water New Zealand Conference and Expo. It will provide a meeting platform for international water and sanitation professionals and practitioners and New Zealand WASH professionals, scientists and experts around common themes.
Theme: Empowering Tomorrow – Smart Water Solutions for Resilient Communities

The 19th IWA Conference on Sludge Management -Toward material cycle and low carbon society
2025-10-21 - 2025-10-24 | Kyoto, Japan
The IWA Conference on Sludge Management is an international conference organized by the Sludge Management Specialist Group (SMSG), one of the specialist groups of the International Water Association (IWA), with support from IWA Headquarters and other partners.
The main objective of the conference is to share the research results and experiences of researchers and engineers in this field from around the world and to create a platform for technological innovation.

Desalination Technology Expo 2025
2025-11-04 - 2025-11-06 | Valencia, Spain
Desalination Technology Expo is the world’s first 100% dedicated global exhibition and conference for the design, specification and operation of next-generation Desalination Projects and for upgrading and retrofitting existing desalination plants and facilities.
This is the must attend event for everybody engaged in Design, Development and Operation, Upgrading and Futureproofing. It is the place where current and next generation technologies will be discussed and presented, debated and on show in a world class exhibition.

Salon des Maires
2025-11-18 - 2025-11-20 | Paris, France
The Salon des Maires et des Collectivités is a place for collective construction, where players from the public and private sectors and associations can collaborate, exchange ideas and experiences and work together to meet the urgent challenges facing local authorities.

Water Project Europe – From Alternative Water to Circular Solutions
2025-12-02 - 2025-12-04 | Brussels, Belgium
Water Knowledge Europe – Winter Edition 2025, taking place from 2 to 4 December 2025 in Brussels, is the flagship brokerage and networking event of Water Europe for R&I. It brings together researchers, innovators, industries, utilities, policymakers, investors, and stakeholders from across Europe and beyond, all united by the shared goal of advancing a Water-Smart Society and Economy.

Water Projects Europe – Circularity in Industrial Water
2025-12-03 09:00 - 13:00 UTC | Brussels, Belgium
Anchored in the Zero Pollution Action Plan, and the newly launched Water Resilience Strategy, circular industrial water use has become a policy and societal priority. It is not only about technological innovation but also about systemic transformation across value chains.
This is the rationale behind Water Projects Europe 2025 – Circularity in Industrial Water, taking place at the Winter Edition of Water Knowledge Europe. The event will bring together three flagship Horizon Europe funded projects, RESURGENCE, CORNERSTONE, and R3VOLUTION, all developed under the Processes4Planet partnership (A.SPIRE). Each of them is testing and demonstrating advanced solutions for industrial water reuse, energy and resource recovery, and pollution reduction, showcasing pilots across Europe’s strategic sectors.

Water Project Europe – From Alternative Water to Circular Solutions
2025-12-03 09:00 - 13:00 | Brussels, Belgium
We bring these five projects together under the Water Projects Europe event to tell a single story: how pioneering demonstrations and systemic strategies can converge to accelerate the transition towards a Water-Smart Society and Economy and align to the goals of the EU Water . This is not only about technologies and pilots but about weaving them into the bigger picture, linking climate adaptation with circularity, innovation with governance, and projects with policies that will define Europe’s water future.

IWA Water and Development Congress & Exhibition 2025
2025-12-08 - 2025-12-12 | Bangkok, Thailand
The Water and Development Congress & Exhibition 2025 will take place in Bangkok, Thailand from 8-12 December 2025. It builds on the resounding success of the 2023 edition in Kigali, Rwanda, which was a landmark event for water, sanitation, and climate resilience in low- and middle-income countries. Attracting nearly 2,700 participants from 85 countries, the 2023 Congress featured an engaging programme of 39 technical sessions, 40 workshops, and 5 forums, including the High-Level Summit on Sanitation and the Climate Smart Utilities recognition programme.

IWA Biofilms Reactors Conference
2026-03-16 - 2026-03-19 | Orange Beach, Alabama (USA)
The International Water Association (IWA) has hosted 25 specialty conferences pertaining to biofilms since 1989; 11 of them were focused on biofilm reactors. Biofilm Reactor Technology and Design 2010, which was co-organized by IWA and the Water Environment Federation, was the most recent of these conferences to take place in the U.S.A. After 16 years, the 26th specialty conference in this series – IWA Biofilm Reactors 2026 –will return to the U.S.A. in Orange Beach, Alabama.

IWA Water Loss 2026
2026-04-26 - 2026-04-29 | Rio de Janeiro, Brasil
Waterloss 2026 will provide an unparalleled platform for sharing knowledge, fostering collaboration, and driving forward the global agenda for sustainable water management. With the increasing challenges posed by climate change, population growth, and aging infrastructure, the need for effective water loss reduction strategies has never been more critical. This conference will feature a range of workshops, panel discussions, and technical sessions designed to address both the technical and policy aspects of water loss.

IFAT Munich 2026
2026-05-04 - 2026-05-06 | Munich, Germany
The world’s leading trade fair for environmental technologies is the most important meeting place for the industry. Here you can successfully present your strategies and new solutions from the fields of water, wastewater, waste and raw materials management. So that in future even more resources can be preserved in intelligent cycles in the long term and with the greatest possible efficiency.

Nutrient Removal and Recovery 2026
2026-05-17 08:00 - 2026-05-21 17:00 | Delft, The Netherlands
The city of Delft welcomes the 2026 Nutrient Removal and Recovery (NRR) Conference, a flagship event of the International Water Association (IWA).
Home to Antonie van Leeuwenhoek and the renowned Delft School of Microbiology, Delft has long been at the forefront of bio-inspired innovations in the global water sector. Building on almost 40 years of NRR conferences, NRR2026 offers a premier venue to explore the latest biotechnological advancements in (waste)water management. Special emphasis will be placed on the role of curiosity-driven research as the foundation for groundbreaking technological solutions.
NRR2026 will bring together key stakeholders — from international academics to industry leaders, practitioners, and policymakers. With strong engagement from universities, research institutes, industry, and governmental agencies, NRR2026 will be a pivotal moment in accelerating the transition from research to real-world impact, providing a roadmap for resilient, sustainable, and climate-proof cities.

Global Water Summit 2026
2026-05-18 - 2026-05-20 | Madrid, Spain
The Global Water Summit is returning to Madrid for 2026, hosted at the Madrid Marriott Auditorium. With visits to local sites and a dinner at a nearby estate, we’re looking forward to exploring the heart of Spain. Register to join us at the water industry’s most anticipated event and explore this year’s stylish venue.

11th International Conference on Sewer Processes and Networks (SPN)
2026-05-20 - 2026-05-22 | Trondheim, Norway
The International Conference on Sewer Processes and Networks (SPN) is held every 3rd year by the Sewer Systems and Processes Working Group under the IWA specialist group on Urban Drainage (Joint IAHR/IWA). The last of these conferences, the SPN 8, SPN 9 and SPN 10, were held at TU Delft in Rotterdam, The Netherlands, at Aalborg University in Aalborg, Denmark, and at TU Graz in Austria. The next SPN will be held from 20th to 22nd of May 2025, and we are happy to host the 11th edition of the International Conference on Sewer Processes and Networks in Trondheim, Norway at the Norwegian University of Science and Technology (NTNU).
