Can you brush your teeth with tap water while travelling?
If the local tap water is safe to drink, it is also safe to use for brushing your teeth. You do not need a separate rule just because the water is coming from a bathroom tap.
Where travellers are advised not to drink the tap water, use bottled, boiled or properly treated water for brushing as well. A small amount is often swallowed while rinsing, so using a known safe source is a simple precaution.
Use the same standard as drinking water
The easiest rule is to treat brushing water exactly as you would drinking water. If you would not fill a glass from the tap, do not use it to rinse your mouth or toothbrush.
Keep a bottle or clean cup beside the sink so you do not have to remember each time. Make sure bottled water is sealed, or use water from a clearly labelled filtered refill station.
What about showering and washing your face?
Water that is not recommended for drinking is usually still suitable for showering, washing your hands and normal skin contact. Try not to swallow it, and avoid using questionable water around contact lenses or open wounds.
Children may need closer supervision because they are more likely to swallow bath or shower water. Follow any local warning that specifically advises against bathing or skin contact.
What to do after using unsafe tap water once
Accidentally brushing your teeth with local tap water does not mean you will become ill. Stop using it, switch to a known safe source and continue your trip as normal unless symptoms develop.
Do not take antibiotics or other medication simply because of one accidental rinse. If diarrhoea, vomiting or fever develops, focus on hydration and seek medical advice when symptoms are severe or persistent.
Popular countries where tap water is safe for brushing teeth
In countries with a reliable public drinking-water supply, travellers can normally brush their teeth directly from the tap. Read the full guidance for Australia, Canada, France, Iceland, Italy, Japan, the Netherlands, New Zealand, Singapore and Switzerland. Temporary local advisories and private water supplies can still create exceptions, so check the exact place you are staying.
Popular destinations with safe tap water
Bathroom tap water is generally safe for brushing in Sydney, Melbourne, Vancouver, Tokyo, London, Paris, Rome, Reykjavik, Auckland and Amsterdam. In older buildings, run the cold tap briefly if water has been standing for several hours and ask the accommodation about any private tank or plumbing issue.
Countries where bottled or treated water is the safer choice
Visitors are generally advised to use sealed bottled, boiled or properly treated water for brushing in India, Egypt, Morocco, Sri Lanka, Thailand, Indonesia, Mexico and Peru. The full country guides explain local differences, hotel practices and whether boiling or filtration is suitable.
Common questions
Can you brush your teeth with tap water if it is safe to drink?
Yes. Water that is safe to drink is also safe for brushing your teeth.
Should you use bottled water for brushing when tap water is unsafe?
Yes. Use sealed bottled, boiled or properly treated water if travellers are advised not to drink from the tap.
Can one accidental rinse make you sick?
It is possible but not certain. Switch to safe water and monitor for symptoms rather than assuming illness will occur.
Can you shower in water that is not safe to drink?
Usually yes. Avoid swallowing it and follow any separate local warning about bathing or skin contact.
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