A temporary disruption in the drinking water supply is especially inconvenient when that is the moment you discover how much water you use daily. With a small supply and a clear plan for safe water, you can handle the first 72 hours much better.
In short
- The Dutch emergency kit checklist counts on approximately 3 liters of water per person per day.
- For 72 hours, that is about 9 liters per person, excluding additional needs.
- In the event of a disruption, first use stored safe drinking water.
- Natural or rainwater is not automatically drinkable.
- A water filter does not necessarily remove viruses or chemical contamination.
How much water do you need?
About 3 liters of water per person per day is recommended as a practical emergency supply. For a household of four, that means about 36 liters for three days. Also, take into account pets, baby formula, and medical needs.
How do you store an emergency supply?
Use clean, food-safe bottles or containers and follow the storage and shelf-life instructions for the product or container. Keep the supply in a cool, dark, and accessible place and check it regularly.
What do you do if your supply runs out?
First, follow the instructions from the water company and local authorities. They can indicate whether tap water needs to be boiled, should not be used temporarily, or where safe water is available.
Can you drink rainwater or natural water?
Not without assessment and appropriate treatment. Water from rivers, ditches, lakes, and rainwater harvesting can contain microorganisms or chemical contaminants. Choose the cleanest source where possible and avoid water near sewage, agriculture, industry, or visible pollution.
Boiling, filtering, or disinfecting?
- Boiling: is highly reliable against many disease-causing organisms, but does not remove chemical contamination.
- Water filter: depending on the type, can reduce bacteria, parasites, and sediment; always check the specifications.
- Disinfection: may be necessary as an additional step when viruses pose a risk or if a filter is not designed for them.
Use water sparingly
Reserve safe drinking water primarily for drinking and food preparation. Postpone non-essential cleaning and, for other tasks, use only water that is clearly safe enough for that purpose.
Practical 72-hour checklist
- sufficient stored drinking water;
- clean extra containers;
- a way to boil water;
- if necessary, a suitable filter or disinfectant;
- information from the water company and government;
- extra water for pets and special needs.
View options for water storage and read our more detailed explanation on safe drinking water and water treatment.
Conclusion
For 72 hours without tap water, a pre-stored supply is the simplest and most reliable solution. Water from alternative sources can be a backup, but only when you understand the risk and tailor the treatment accordingly.
