Enter Your Household
Water is the one thing you cannot improvise. Tell us about your household and we'll calculate exactly how much water you need to store — broken down by drinking, cooking, hygiene, and pets.
Your Water Storage Estimate
Breakdown by use:
Planning estimate only. Based on FEMA and Red Cross water storage guidelines. Actual needs vary by activity level, health conditions, and climate. In extreme heat, water needs can increase significantly — older adults are especially vulnerable to dehydration. Always store more than the minimum. Rotate stored water every 6–12 months.
Common Questions
How much water does a person need per day in an emergency?
FEMA recommends a minimum of 1 gallon per person per day — half for drinking, half for sanitation. In hot weather or for physically active people, drinking needs can double to 1 gallon just for drinking. For seniors in summer heat in Florida or the Southwest, plan for 2+ gallons per person per day.
What is the best way to store emergency water?
Commercially bottled water is the safest and simplest option. For larger quantities, use food-grade plastic containers (look for HDPE with recycling code 2) or dedicated water storage barrels. Store in a cool, dark location away from direct sunlight and chemicals. Never use containers that held non-food products. Rotate every 6–12 months.
Can I use tap water to fill storage containers?
Yes. Municipal tap water is safe to store in clean, food-grade containers and will remain safe for 6–12 months. Because it arrives already disinfected, it does not need anything added to it for ordinary storage. If you ever need to treat water whose safety you are unsure of, follow the published guidance from the EPA or your local health department rather than a ratio you found online — household bleach is sold in several different strengths, and scented, splashless and gel formulations must never be used. Private well water should be tested and treated on the advice of a certified laboratory or your county health department before storage.
How do I store water for my pets during an emergency?
FEMA recommends 1 quart (0.25 gallon) per day for small pets and up to 1 gallon per day for large dogs. Store pet water separately and use the same rotation schedule as your human water supply. In extreme heat, pets need more water — watch for signs of dehydration: lethargy, dry gums, sunken eyes.