# Phantasialand says Microsoft outage blocked pool safety alerts before guests fell ill

_Published Sunday, November 15, 2026 at 3:19 PM EST · Products · Latest · Tier 2 — Notable_

![Phantasialand says Microsoft outage blocked pool safety alerts before guests fell ill — Primary](https://www1.wdr.de/nrw/koeln/phantasialand-134~_v-gseagaleriexl.jpg)

Phantasialand told WDR that a Microsoft email outage prevented staff from receiving automated safety alerts after a faulty dosing system pumped too much chlorine into a hotel pool. Fifteen guests at its Ling Bao hotel in Brühl were affected, with respiratory irritation among the reported symptoms.

Four guests went to hospital, and one remained under observation with a moderately serious injury. Emergency responders found excessive chlorine levels caused by the dosing defect. The pool was temporarily closed, its water was replaced and it later reopened. The company's account links the missed warnings to disrupted email delivery; the dosing equipment itself malfunctioned.

## Sources

- [www1.wdr.de](https://www1.wdr.de/nrw/rheinland/rhein-erft-kreis/technischer-defekt-chlor-phantasialand-100.html)

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Canonical: https://techandbusiness.org/newswire/3fpFtrDVTZf-N-4aMmKjNa
Published: 2026-11-15T20:19:07.329Z
Story chronology: 2026-11-13T19:28:00.000Z
Retrieved: 2026-11-15T23:01:18.666Z
Publisher: Tech & Business (techandbusiness.org)