Tap water safety – what to do after an alert
How to decide what to do with tap water after a South African supply interruption, contamination alert or change in taste and smell.
Use the local notice as the source of truth
Tap-water safety is local and can change after a burst pipe, outage, flood, treatment problem or chemical incident. Check the municipality or health authority notice for your exact area. Taste, colour or smell can be a reason to report a problem, but appearance alone cannot prove that water is safe.
Different alerts need different actions
- A boil-water notice tells you to treat water before the uses named in the notice.
- A do-not-use notice means boiling may not be enough; use an alternative source as directed.
- A supply interruption can allow sediment or air into pipes, so follow the utility's flushing guidance.
- A private borehole or tank needs its own testing and maintenance plan.
Do not spread an old screenshot as current advice. Record the notice date and area, and check for updates.
Make a household plan
- Save the municipality or water-service alert channel.
- Keep clean covered containers available for an interruption.
- Plan safe water for drinking, cooking, infant feeds and medicines.
- Seek help if diarrhoea, vomiting or dehydration develops after unsafe water exposure.
Report severe illness after a water event
Common questions
- Can you drink tap water in South Africa?
- Safety depends on the supply and any current local alert. Check the municipality or health authority for your area rather than applying a country-wide yes or no.
- What should I do if tap water smells different?
- Do not rely on smell alone. Check local notices, report the change to the water service and follow any boil or do-not-use instruction while it is investigated.
Sources
- Norms and standards for health surveillance of premisesNational Department of Health, South Africa
- Drinking-water safety guidanceWorld Health Organization
Last reviewed 26 August 2026.