Waternet operated 12 wastewater treatment plants for the water board Amstel, Gooi en Vecht (AGV) in 2015, and on January 1, 2026 that task left it. The company that had run Amsterdam's drinking water, sewers and water management alongside all of AGV's tasks became two separate organizations, as AGV and the city had advised on May 30, 2024.
What moved
In 2015 those 12 plants received 130,860 thousand m3 of wastewater, with a capacity of 1,729 thousand population equivalents. Treatment now sits in the water board's own organization. The Amsterdam body, whose statutes name it Stichting Watermaatschappij Amsterdam, keeps drinking water for a network of 3,355 km and 543 thousand connections at the end of 2025, plus the city's sewer and water-management tasks.
What is still shared
The split is complete in law. Under its statutes as at January 1, 2026, Waternet temporarily provides AGV with IT and information services, runs the joint control room, and manages AGV's sewer end-pumping stations and pressure mains, including incident response on them.
The regulators' view
The Human Environment and Transport Inspectorate ended its enhanced supervision of Waternet on January 1, 2023, after a 2021 finding that cybersecurity was not sufficiently under control. In its tariff advice published on July 27, 2026, the ACM gave Waternet extra attention because of shortcomings in earlier years and found all companies' tariffs in line with the rules.
Phase 2
In a second phase, which Waternet's director in June 2026 placed in the coming years, drinking water is to continue as a stand-alone company once a study has set its governance, and the sewer and water-management tasks are to return to the city. No date has been published.
How the new interfaces affect sewer renewal, supply capacity after 2030 and the 2027 tariff are among the questions the report answers. The full report, Water Systems Overview: Waternet, is available for USD 499. For a free overview, read the Waternet Utility Snapshot.