A water supply interruption in a healthcare setting: the response

When a hospital, care home or clinic loses its water, the first question is clinical impact, not plumbing. Protect the most vulnerable patients, maintain infection control and essential care, provide alternative water for each essential use, and restore and verify the supply before trusting it for clinical purposes.

What has happened

A mains failure, burst, contamination incident or planned outage leaves a care or healthcare site without a normal water supply, or with water that may be unsafe. Water underpins drinking, hand hygiene, decontamination, catering, sluices, some medical devices and heating, so a loss touches infection prevention and clinical safety at once. HTM 04-01 (Safe water in healthcare premises) and NHS emergency-preparedness, resilience and response (EPRR) principles treat water as a critical utility whose loss is a business-continuity emergency to be planned for in advance.

Immediate actions

Activate the business continuity plan and convene the responsible people (estates, IPC, clinical leads, on-call manager). Establish the scope and expected duration, and identify essential water uses and the patients most at risk if they are not met. Provide alternative water proportionate to each need: drinking water, hand hygiene alternatives, and clinical-grade water where required. Decide which activities can continue safely and which must pause or divert, prioritising the most vulnerable. Communicate clearly to staff, patients and, where relevant, families and commissioners.

What not to do

Do not treat it as an estates-only issue with no clinical input, and do not assume alcohol gel replaces hand washing for every situation (some organisms and soiling need soap and water). Do not resume clinical use of water after an interruption without the flushing or checks your water safety plan requires, and do not forget less obvious dependencies such as endoscope reprocessing, dental units, humidification or renal services.

Who is responsible

The provider's accountable and responsible persons for water safety (as set out in HTM 04-01) and the business-continuity lead own the response, with the infection prevention and control team and clinical leads advising on safe care. The water safety group informs restoration decisions. In a small care home, the registered manager coordinates with the water supplier and any contracted water-safety specialist.

Evidence and records

Record when the interruption began, the clinical-impact assessment, the business-continuity actions and alternative water provided, the activities paused, the communications sent, and the restoration steps (flushing, sampling or disinfection) with the responsible person's sign-off before clinical use resumed. Keep any CQC notification decision and its rationale.

Escalation

Escalate to the water supplier and, for a significant or prolonged loss, to commissioners and emergency-planning contacts. Where safe care is materially affected, consider a CQC notification. If the interruption or restoration raises a legionella or contamination risk, follow the water safety plan and see the wider critical healthcare services verification approach, and coordinate any works with the healthcare maintenance IPC handover.

Prevention

Maintain a water business-continuity plan that names essential uses, alternative supplies and decision-makers, keep the water safety plan and HTM 04-01 arrangements current, test contingency arrangements, and hold supplier and specialist contacts ready. A rehearsed plan turns a sudden loss into a managed event rather than an improvisation.

Where Complys can help

Complys can hold the site's water safety and business-continuity documents, contractor and check records, and the action log for an incident, keeping the response and restoration evidence together for CQC. It does not manage a water system or make clinical safety decisions; the responsible persons, IPC and clinical teams do. Ask the Complys team to show how continuity documents and incident actions are tracked.