How long water keeps in a tote
CDC says to replace stored emergency water every six months. Light, warmth, an open cap and a dirty hose all shorten that. A shaded, closed, screened tote filled from the tap can keep its water in good order for the full six months.
Last reviewed November 11, 2026
What shortens the life of stored water
- Light: sun on a translucent bottle grows algae.
- Heat: a tote in a Florida July warms and speeds growth.
- Air: an unscreened cap lets in insects and dust.
- Contamination: a dirty hose or bucket carries bacteria in.
- Time: after six months, replace it regardless.
Any one of these can ruin a tote of water. Together they do it fast. The remedy is boring: shade, a closed cap, a clean hose and a calendar.
A calendar that works
| When | Do |
|---|---|
| May | Fill, cover and date the tote |
| July | Check the cap, the screen and the shade |
| September | Check again, peak of hurricane season |
| November | Replace the water, season ends |
| December | Use the old water on plants |
Write the fill date on the cage in marker. A date you can read from five feet is a reminder that works.
What to do with the old water
Water that has aged out of drinking use is still fine for plants if the tote was clean. Pour it on a lawn, a hedge or a nursery bench, then flush the tote, refill and date it again. Do not pour it into a storm drain if it carries a treatment chemical.
Signs it is time sooner
A green tint, a smell, floating specks, a film on the surface or a taste that has changed are all reasons to empty the tote now. Do not try to rescue it. Drain, rinse, check the screen and fill again.
Storing water in a tote that is not new
If the tote is a rinsed or reconditioned one used for utility water, the six-month rule is a limit, not a goal. Utility water is for plants and washing and does not need the same standard, but it still breeds mosquitoes and algae. Use it often, refill it often and treat any green tint as a prompt to empty and rinse.
Labels that help
Write the fill date on duct tape on the cage and the replace-by date beside it. Keep a calendar reminder. Note the source of the water. If you treated it, note the treatment. A tote with a label is a tote that gets used.
Questions people ask
Does the six-month rule apply to rain?
Rain is not drinking water; use it, do not keep it.
Can I reuse a tote of old water for plants?
Yes, if the tote was clean.
How often do I replace stored water?
Every six months, per CDC.
Does a shaded tote last longer?
Yes. Less light means less algae.
Can I top it up?
Fresh water mixed into old water does not restart the clock.
Does the water go bad in a sealed tote?
It can, slowly. Replace it on schedule.
What do I do with old water?
Use it on plants.
Ask about a water tote
Say how much water and where it will stand.