In the event of a pipeline break, a controlled flushing by the municipality is usually sufficient. If there is uncertainty about potential contamination in the water supply, the municipality will assess whether to take a water sample and issue a boil water advisory.
A boil water advisory is always issued in consultation with the municipal chief medical officer.
Practical advice during a boil water advisory
If a boil water advisory is issued, you should follow the recommendations from Folkehelseinstituttet/the Norwegian Institute of Public Health: What should you do when you receive a boil water advisory from the waterworks?
You should boil water before using it for:
- Drinking, mixing juice, and other beverages.
- All food that will not be boiled or heated above 100°C.
- Coffee, as coffee makers do not boil water—boil water separately before making coffee.
- Ice cubes.
- Rinsing fruit, salad, and vegetables that will not be cooked.
- Brushing teeth.
Unboiled water can be used for:
- Cooking food that will be boiled.
- Handwashing: Wash hands with soap, rinse, and dry properly.
- Showering and bathing: You can shower and bathe as usual during a boil water advisory. If you have a weakened immune system or open wounds, it is recommended to take a quick shower and dry off thoroughly afterward. Avoid swallowing water, and be extra cautious with small children.
- Washing dishes by hand or using a dishwasher.
- Doing laundry and general household cleaning.
- Other domestic uses.