Build Your Emergency Water Supply

A water reserve is one part of preparing for a service interruption. Begin with your household’s needs and choose a storage arrangement you can maintain.

Plan the amount

CDC recommends at least one gallon per person per day for three days, with a two-week supply if possible. Include additional needs such as pets, illness, or hot weather. CDC emergency water guidance

Write down your target before choosing container sizes. Think about available space and how easily you can carry or dispense water.

Choose suitable containers

Unopened commercial bottled water is CDC’s most reliable emergency option. For water you fill yourself, use suitable food-grade containers with tight lids. Never reuse containers that held toxic chemicals. Clean and sanitize containers using CDC’s instructions before filling.

Store and rotate

Label self-filled containers with the storage date. CDC advises replacing self-filled stored water every six months. Follow date guidance for commercial bottled water, and keep your supply cool, away from sunlight and chemicals. CDC storage instructions

Keep an inventory with each container’s location and next review date. Use smaller containers if lifting a large one would be difficult. Check that the shelf or storage surface can support the load.

Understand treatment limits

Storage containers, filters, disinfectants, and preservatives do different jobs. Do not assume that a filter removes every contaminant or that an additive makes water safe indefinitely. Follow the exact product label and local health advice.

CDC warns that water contaminated with fuel or toxic chemicals cannot be made safe through boiling or disinfection. Use a different safe source in that situation. CDC emergency water treatment guidance

Your water-storage checklist

• Set a household storage target.

• Choose manageable, suitable containers.

• Follow cleaning and filling instructions.

• Label dates and record storage locations.

• Keep dispensing equipment clean.

• Plan review and replacement reminders.

During an emergency, follow your local water utility and health department’s instructions.

Sources reviewed: 2026-10-20.