Ten children and one adult were taken to hospital after an excess chlorine incident at the swimming pool of the Clayton Hotel Liffey Valley in west Dublin on Thursday. A total of 23 people who were using the pool were medically assessed after reporting that they felt unwell.
What happened at the Dublin hotel pool?
The incident occurred at approximately 3.35pm on October 15, 2026, according to hotel operator Dalata Hotel Group. Emergency services were notified immediately, and the hotel’s emergency plan was activated.
Dalata said 23 pool users received medical assessments. Ten children and one adult were subsequently brought to hospital for further medical attention. The swimming pool has been closed while the circumstances are examined.
The incident is among the major Breaking News developments in Ireland today, with emergency responders treating it as a hazardous materials call rather than a routine medical emergency.
Dublin Fire Brigade responds to hazardous materials call
Dublin Fire Brigade said it received the call at 3.39pm. Firefighters from Tallaght, Dolphin’s Barn, Donnybrook and Dún Laoghaire attended the scene, alongside the National Ambulance Service and An Garda SÃochána.
Specialist firefighters wore breathing apparatus and chemical protection suits while isolating the hazardous substance. A decontamination area was also established at the hotel as patients were assessed by ambulance and fire service personnel.
Dublin Fire Brigade said there was no danger to the wider public and indicated that the emergency response would be scaled back once the situation was brought under control.
- Location: Clayton Hotel Liffey Valley, west Dublin
- Incident: Reported excess chlorine at the swimming pool
- People assessed: 23
- Taken to hospital: 10 children and one adult
- Public risk: Authorities said there was no danger to the wider public
- Current status: The swimming pool remains closed
Hotel pool closed as investigation begins
Dalata Hotel Group said the pool was closed in line with its safety and emergency procedures. The company said a thorough investigation would begin as soon as possible to establish how the incident occurred.
The hotel operator also said its immediate concern was for the people affected and their families, adding that it was supporting emergency services responding at the scene.
At this stage, the available information confirms that an excess chlorine incident was reported, but does not set out the precise cause, the concentration involved or how long the pool area had been affected. Those details are expected to form part of the investigation.
Why chlorine safety matters in swimming pools
Swimming pools use carefully controlled chemical systems to disinfect water and reduce the spread of harmful microorganisms. Chlorine levels must be monitored and managed because excessive exposure can irritate the eyes, skin and respiratory system.
Potential symptoms after exposure can include coughing, breathing difficulties, throat irritation, nausea or dizziness. Anyone who develops symptoms after a suspected chemical exposure should leave the affected area and follow advice from emergency responders or medical professionals.
The response at Liffey Valley involved specialist protective equipment and decontamination arrangements, reflecting the need to treat an indoor chemical release cautiously until the substance and conditions have been assessed.
What happens next?
The swimming pool is expected to remain closed until the hotel and relevant authorities are satisfied that it is safe to reopen. The investigation should examine the pool’s chemical systems, maintenance records, operating procedures and the circumstances surrounding the reported exposure.
For hotel guests and local residents, the most important confirmed update is that authorities said there was no wider public danger. Anyone seeking information about an affected family member should rely on direct updates from the hotel, the emergency services or the relevant hospital rather than unverified social media reports.
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Frequently asked questions
How many people were affected?
Twenty-three people who were using the pool were medically assessed after feeling unwell.
How many people went to hospital?
Ten children and one adult were brought to hospital for medical attention.
Where did the incident happen?
It happened at the swimming pool in the Clayton Hotel Liffey Valley in west Dublin.
Was the wider public at risk?
Dublin Fire Brigade said there was no danger to the wider public.
Is the swimming pool open?
No. The hotel said the pool was closed following the incident as part of its safety and emergency procedures.
Conclusion
The chlorine incident at the Clayton Hotel Liffey Valley resulted in 23 people being medically assessed and 11 hospital admissions, including 10 children and one adult. Emergency services isolated the hazardous substance, established a decontamination zone and said there was no wider public danger. The key next step is the investigation into what caused the excess chlorine exposure and when the pool can safely reopen. This remains a developing Breaking News Ireland story.
