Water is one of the most important resources for survival, which is why having an emergency supply is crucial. Storing water in plastic bottles is a common way to create an emergency water supply. But how long does bottled water actually last before it goes bad? Here is a comprehensive look at how to store water in plastic bottles and how long it will stay safe to drink.
Quick Answers
– Unopened commercially bottled water will typically last 2 years past its printed expiration date if stored properly.
– Once opened, commercially bottled water should be used within 6 months.
– Water stored in food-grade plastic soda/water bottles should be replaced every 6 months.
– Replace water containers that have cracks, leaks, or have been exposed to sunlight.
– Stored water should be kept in a cool, dark place between 50-70°F.
– An emergency water supply should be rotated – use the oldest bottles first and replace them with fresh water.
How Long Does an Unopened Bottle of Water Last?
Commercially bottled water that has been continuously sealed typically has a shelf life of 2 years from the bottling date. However, unopened bottled water will usually last much longer than its printed expiration date if it has been properly stored.
A key factor in how long bottled water lasts is the purity and quality of the water when it was bottled. Most commercially bottled waters go through purification processes to remove microbiological contaminants and are then tightly sealed in sanitary conditions. This gives the water long lasting freshness and extends its shelf life.
According to a study by the Water Quality & Health Council, unopened commercially bottled water showed no substantial deterioration in quality for samples stored up to 4 years at room temperature. The researchers found the water remained microbiologically stable and safe to drink even years after the printed expiration date.
Other research on water bottle expiration dates concluded that water stored in food-grade PET plastic bottles at room temperature stayed fresh tasting for up to 3 years and showed no signs of chemical leaching from the plastic. Exposure to heat and sunlight did result in some plastic leaching, indicating proper storage is important.
Proper Storage of Unopened Bottled Water
To get the longest shelf life and ensure water stays fresh, unopened commercially bottled water should be stored:
- In a cool, dry place – optimal temperature range is 50°F – 70°F
- Away from direct sunlight and heat sources
- In an upright position, not laying horizontally which can cause the plastic to degrade faster
With proper storage conditions, most unopened commercially bottled water remains safe and pleasant tasting for 2+ years past its printed expiration date. The exception would be if the bottle is damaged or begins leaking, allowing contaminants inside. Otherwise, as long as the seal remains intact, bottled water lasts a very long time.
How Long Does Opened Bottled Water Last?
Once opened and exposed to air and contaminants, the shelf life of bottled water reduces considerably. The timeline depends on how it is stored after opening:
Opened Bottled Water Stored in the Refrigerator
– Lasts up to 1 week past printed expiration date
– Keep refrigerated and tightly sealed
– Discard if smells funky or tastes unpleasant
Opened Bottled Water Stored at Room Temperature
– Lasts up to 2-3 days past printed expiration date
– Keep tightly sealed
– Discard if smells funky or tastes unpleasant
The Food and Drug Administration recommends consuming opened bottled water within one week if refrigerated and within a few days if stored at room temperature. This short shelf life is because the sealed system has been compromised and opened bottled water is more vulnerable to bacterial growth from exposure to air, light, and warmer temperatures.
Check the water for any odd smells or tastes before drinking. Cloudiness, sliminess, or foul odors indicate bacteria growth and the water should be discarded immediately.
How Long Does Water in Plastic Soda or Food Bottles Last?
Many people reuse plastic soda, juice, or food bottles to store tap water for emergency supplies. These food-grade PET plastic bottles can safely hold drinking water, but require more frequent replacement than commercially bottled water.
For the best quality, replace tap water stored in plastic food bottles every:
- 6 months if stored at room temperature
- 9-12 months if refrigerated
The shorter lifespan is because tap water does not go through the same purification processes as commercially bottled water. Tap water contains minerals and microbes that can alter taste and quality over time. Additionally, reused plastic bottles are more porous than new bottles designed specifically for bottled water.
To maximize freshness:
- Use 2-liter or 20 oz plastic beverage bottles, which are thicker and more durable than smaller bottles.
- Wash bottles thoroughly with hot water and soap before each refill.
- Sanitize by adding 1 teaspoon bleach per gallon of water, shaking, letting stand 30 minutes, then rinsing well.
- Fill with cool tap water – do not use water from the hot water heater which contains more contaminants.
- Rotate water every 6-12 months for best quality.
Check stored tap water for odors, colors, or sediment before drinking. Discard any bottles that are damaged or leaking. Reusing plastic bottles intended for soda or foods is fine for short term water storage, but replace them regularly for safety.
How to Store an Emergency Water Supply
Storing bottled water for emergency preparedness requires some additional steps compared to everyday usage:
Choose Quality Bottles
– 2-liter PET plastic soda bottles or 20 oz. water bottles are ideal choices. Avoid reusable sports drink bottles which typically degrade faster.
– Inspect bottles for cracks, cloudiness, or wear and leak test before filling. Discard any suspect bottles.
Prepare Bottles for Long Term Storage
– Wash with hot soapy water then sanitize with a bleach solution (1 tsp per gallon of water).
– Rinse thoroughly with hot water before filling.
Store in Cool, Dry, Dark Locations
– Store emergency water supply in the basement, cabinets, or closets for darkness.
– Choose areas between 50°F – 70°F if possible.
– Avoid places that experience temperature extremes like attics or garages.
– Do not store bottles directly on cement floors which can transfer cold and dampness.
Rotate Stock Frequently
– Label bottles with date filled.
– Use oldest water first.
– Replace used bottles with fresh water.
– Rotate out water every 6-12 months.
Proper emergency water storage ensures you always have fresh, safe drinking water on hand when needed most. Rotate bottles regularly so water does not expire before an emergency arises. With the right storage methods, plastic bottles can safely provide drinking water for years if kept sealed and stored in cool, clean conditions.
Signs Your Stored Water Has Expired
While plastic bottles can preserve water for years, improper storage or compromised seals can contaminate stored water. Always inspect water for the following signs of spoilage before drinking:
Appearance Changes
- Cloudiness
- Change from clear to colored
- Floating particles
- Slimy residue on bottle
Odor Changes
- Smells earthy or musty
- Smells like chemicals
- Smells rotten
Flavor Changes
- Tastes flat or stale
- Bitter or odd aftertaste
Any of these changes indicate bacteria or chemical leaching in the water. Do not drink water with these signs of contamination – discard immediately.
Frequently Asked Questions
Does bottled water ever expire?
Yes, bottled water does expire eventually. However, commercially bottled unopened water lasts 12-24 months past its printed expiration date if properly stored. Opened bottled water only lasts about 6 months.
Can you drink water after the expiration date?
It’s usually safe to drink commercially bottled water up to 2 years past its expiration date as long as the bottle remains properly sealed. However, drink soon after opening and be alert to any odd smells or tastes.
Does water go bad in plastic bottles?
Water itself does not go bad, but plastic bottles can leach chemicals into the water over time, causing odd tastes and odors. Store in cool, dark locations and replace bottles every 6-12 months for best quality.
How can you tell if bottled water is bad?
Cloudiness, chemical odors, slimy texture, or foul tastes indicate bottled water has expired and may be unsafe to drink. Discard water with any signs of contamination.
Can you get sick from drinking old water?
Yes, drinking expired bottled water can make you sick. Bacteria like salmonella, e. coli, listeria, and legionella can grow in compromised bottled water, especially if stored over 70°F. Discard water with any foul signs rather than risk getting ill.
Conclusion
Water stored in plastic bottles for emergency preparedness remains fresh and potable for up to 2 years if properly stored unopened. Once opened, bottled water only lasts about 6 months before risking bacterial growth. Replace tap water stored in clean soda bottles every 6-12 months for best results. Always inspect water for odd colors, textures, or smells before drinking to ensure safety and quality. With the right storage methods, plastic bottles are an economical and portable way to store emergency water supplies.
