How to Store Water Safely

CDC's steps for cleaning containers, what containers to use, where to keep water and how often to replace it.

Jump to the checklist

Unopened commercial bottled water is the safest choice. Use the date on the bottle.

For storing your own tap water, CDC’s steps are:

Choose a container

  • Food-grade container, ideally. If you are unsure, ask the manufacturer.
  • Otherwise: tight lid, unbreakable (not glass), narrow opening if possible.
  • Never use containers that held toxic chemicals, such as bleach or pesticides.

Clean and sanitize it

  1. Wash with soap and rinse.
  2. Mix 1 teaspoon (5 mL) of unscented 5% to 9% bleach into 1 quart (about 1 L) of water.
  3. Put the solution in the container, cover, and shake so it touches every surface.
  4. Wait at least 30 seconds, then pour it out.
  5. Let the container air-dry.

Fill and store

  • Fill with safe tap water and seal tightly.
  • Label it “drinking water” with the date.
  • Keep it cool, between 50°F and 70°F (10°C and 21°C).
  • Keep it out of direct sunlight and away from gasoline and pesticides.
  • Replace stored tap water every 6 months.

Using it

Use a clean scoop or pour. Do not put your hands in the water.

If you need water quickly, such as under a wildfire evacuation alert, PreparedBC suggests filling large containers.

Checklist

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Where to buy

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  • Water storage container, 7 gal / 26 L

    Reliance: Reliance Aqua-Tainer 7 Gallon Rigid Water Container

    A rigid 7 gal (26 L) container sold for drinking water storage, so one jug covers several person-days.

Sources

Updated November 9, 2026