The European construction sector is moving from sustainability ambition to verifiable, machine-readable evidence. The revised Construction Products Regulation introduces environmental performance data such as Global Warming Potential and Environmental Product Declarations, while Digital Product Passports will increase demand for transparent, traceable material information. For water utilities managing complex underground networks and legacy data, this creates an urgent challenge: how do we turn fragmented asset information into reliable sustainability insight?

Hack the Water Graph brings together linked data and openBIM to build that chain in practice. This free three-day hackathon in Amsterdam invites participants to connect RDF/JSON-LD, IFC 4.3, IDS and bSDD into working prototypes across four linked use cases:

  • UC1 — Linked Asset Fabric: connect GIS, Maximo and document management data into one queryable RDF graph using the W-OTL ontology.
  • UC2 — Materials Passport, Dual Route: create CPR/ESPR-ready material passports for both new projects through IFC 4.3, IDS and bSDD, and existing assets through extraction from legacy systems.
  • UC3 — Sustainability Compliance Dashboard: translate graph data into evidence for CSRD, EU Taxonomy and reporting workflows, while making data quality gaps visible.
  • UC4 — Environmental Impact in Asset Management Decisions: bring function, cost, risk and embodied carbon together so sustainability becomes part of everyday asset management choices.

All teams work from one shared seed dataset and present their results in an open-source IFC viewer — showing the journey from raw legacy data to a carbon-aware decision directly in the model.

The hackathon is co-organised by Waterschap Amstel, Gooi en Vecht, Waternet ARW and buildingSMART International, together with the University of Amsterdam and the Amsterdam University of Applied Sciences, and supported by Ingenieursbureau Amsterdam.

Participation is free, making it an accessible opportunity for data specialists, engineers, asset managers, software developers and sustainability professionals to collaborate on real-world water infrastructure challenges.

Register for free and join us in Amsterdam to help shape the next generation of open, sustainable water infrastructure data: hackthewatergraph.waternet-events.nl