Understanding water notices and finding safe supplies
Use this when: Your water provider issues a restriction or the supply stops.
Current official instructions for your area take priority. UK Ready is an independent information site, not a government service. This guide is written from the official sources listed below; it has not yet had a specialist review. Sources checked 24 October 2026.
ACTION SUMMARY
- 1The notice's wording matters. Read the affected addresses, start time and permitted uses.
- 2DWI advises bringing water to a rolling boil when a boil-water notice is issued, then cooling it naturally.
- 3A household filter does not replace a boil-water notice.
- 4During an outage: Check supplier updates and collection or delivery arrangements.
In detail
The notice's wording matters. Read the affected addresses, start time and permitted uses. Keep the restriction in place until the issuing organisation changes or lifts it. Water running again does not by itself cancel a safety notice.
| Notice | Drinking and food use | Other uses |
|---|---|---|
| Boil water | Follow the notice's boiling procedure or use confirmed safe bottled water | Follow its advice about washing, bathing and cleaning; prevent accidental swallowing |
| Do not drink | Use a confirmed safe alternative for drinking, food, teeth, ice and pet water | Showering, cleaning and flushing depend on the actual notice; do not assume permission |
| Do not use | Do not use the supply for any purpose prohibited by the notice | Use a safe alternative and follow explicit instructions |
DWI advises bringing water to a rolling boil when a boil-water notice is issued, then cooling it naturally. Use the safe water for drinking, teeth, ice, food preparation, feeding equipment and pets as directed. Keep hot water away from children. If there is no safe way to boil it during a power cut, seek confirmed safe bottled or distributed water; do not bring an outdoor stove indoors.
A household filter does not replace a boil-water notice. Chemical or radiological restrictions require a different response from microbial contamination. Never convert 'do not drink' into 'boil before drinking' without explicit official advice.
During an outage: Check supplier updates and collection or delivery arrangements. Tell the provider if you cannot reach a distribution point or need extra help. Eligibility for a Priority Services Register can help providers understand your needs, but does not promise immediate water delivery.
If the water was confirmed safe before an expected interruption, use clean food-grade containers to store it. Do not fill them from a source already subject to contamination restrictions. Keep drinking water separate from water intended only for permitted toilet or cleaning use.
On restoration: Follow instructions about flushing taps, cleaning connected appliances, replacing filters and discarding ice. For an ordinary outage, some temporary discolouration can occur; after a contamination incident, use the specific advice rather than simply running a tap until the water looks clear.
Update 24 October 2026: don't mix up the notices
Follow the notice from your water supplier or local authority exactly. A boil-water notice addresses microbial risks and has specific instructions. A notice to stop using the supply is different: use bottled water or the alternative supply provided.
Don't turn a restriction into homemade treatment or assume boiling overrides it.
Official sources
This guidance is an editorial explanation of official UK advice. Always follow instructions from the authorities.
- Drinking Water Inspectorate: Receiving a Boil Water Notice Covers: England and WalesPublished: Not stated in the material retrievedChecked: 2026-10-13
- Drinking Water Inspectorate: Information note on Regulation 18 Covers: England and Wales private suppliesPublished: 2022-12-15Checked: 2026-10-13
- UK Government Be Ready: Water supply interruptions or outages Covers: UKPublished: Not stated in the material retrievedChecked: 2026-10-13
- US Centers for Disease Control and Prevention: Drinking Water Advisories An Overview Covers: US supplementaryPublished: 2024-03-04Checked: 2026-10-13US source — supplementary
US sources are used only for the scientific or blast-protection points they support. They never replace UK instructions, numbers or agencies.
Adapted Crown copyright material is used under the Open Government Licence v3.0. No government endorsement is implied.
Common questions
What is the difference between do not drink and do not use?
Do not drink restricts ingestion-related uses; other permission depends on the notice. Do not use prohibits the specified uses altogether. Read the actual provider's instruction, not just a generic label.
Can I brush my teeth during a boil-water notice?
Use properly boiled and cooled water or a confirmed safe bottled supply. Do not use the restricted water untreated for teeth, ice or food preparation.
Can I shower during a water warning?
Permission depends on the type of warning and the actual contamination. DWI's ordinary boil-water guidance allows washing with precautions; a chemical do-not-use instruction may prohibit contact. Follow the notice.
Related guides
- Chemicals and water safetySuspected poisoning or deliberate contamination of water
- Chemicals and water safetyStoring water and planning how much you need
- Power and essential servicesToilets, wastewater and hygiene when services fail
- Family and access needsBabies, children, pregnancy and people who need help