Damage to the roof covering of a storage cellar in Kanaleneiland forced 125,000 households in the Utrecht region to boil their tap water in November 2025. It was one of three major boil-water advisories Vitens issued that year, in Goor, Utrecht and Amersfoort.
Amersfoort still unexplained in March
Vitens dates the Amersfoort advisory to December 2025 and January 2026, affecting 85,000 households. A local newspaper reported more than 85,000 households in thirteen places and said the advisory was lifted on 18 January 2026. On 9 March 2026 Vitens said the investigation into the cause was still under way. It will reimburse customers who spent more than €40 on boiling water, plus other demonstrable extra costs.
Supply minutes within target
Vitens's undersupply measure stayed within target: undersupply minutes were 14:17 in 2025, against a target of 18 minutes or less. Quality reports are a separate measure: Vitens submitted 63 standard-exceedance reports to the ILT in 2024, 30.4% of the sector total.
Where suppliers come in
No storage inspection or renewal programme had been published by November 2026. Its spending is rising, though: net investments reached €341.5 million in 2025, and a €200 million European Investment Bank loan signed on 18 July 2025 supports a 2025–2029 programme that the bank costs at about €516 million. A tender for cleaning about 350 technical sites, reservoirs among them, closed on 13 July 2026, with the first lot estimated to start on 1 January 2027.
Which Vitens tenders are open, how its 2026 procurement calendar and recognition schemes work, and where storage, network and site-service suppliers should focus first are set out in the report. The full report, Vitens: Utility Account Brief, is available for USD 499. For a free overview, read the Vitens Utility Snapshot.