Emergency Water Source Priorities
When tap water is disrupted, source choice matters before treatment starts.
stored emergency water
the next-best source if you prepared and stored it safely in advance
one gallon per person per day
a baseline amount to plan for drinking and sanitation
food-grade containers
use food-safe containers for storage and avoid old milk jugs
protect home water from contamination
shut off incoming water if officials warn of broken lines or contamination
ice cubes
melted ice is usable if it was made from uncontaminated water
hot-water tank water
can be an emergency source after turning off gas or electricity first
water in household pipes
can be drained from faucets if you let air into the plumbing
toilet tank water
use only water from the tank, not the bowl, and only if it is clear and has no additives
canned food liquids
liquid from canned fruits or vegetables can be used as a backup source
rainwater
can be collected but should be treated before drinking
streams, lakes, and ponds
outdoor water sources need treatment before drinking
radiator water
never drink it because it can contain toxic chemicals
waterbed water
do not drink it because materials and additives can contaminate it
pool or spa water
do not drink it because treatment chemicals make it unsafe
flood water
never drink it because it can contain sewage, fuel, and debris
saltwater
do not drink it unless it has been properly distilled
treat questionable water
boil, disinfect, or filter it before drinking when appropriate
bottled water
the safest first choice when it is available and unopened