"Since I already drank from it"... Can I drink the remaining water in the bottled water the next day?

Some people continue drinking the bottled water they drank the day before the next day.

 

It's easy to think it's okay because you don't share it with others, but in fact, drinking from a water bottle like this poses a high risk of exposure to bacteria.

 

According to experiments conducted by the Korea Water Resources Corporation,

 

Immediately after opening a PET bottle cap, there is one bacterium per 1 mL of water.

 

900 creatures when taking a sip

 

It was confirmed that more than 40,000 individuals survived after one day.

 

According to the "Rules on Drinking Water Quality Standards and Testing," water that is not safe to drink is defined as water in which the number of bacteria exceeds 100 per 1 milliliter.

 

A bottled water consumed after one day contains bacteria exceeding 400 times the standard limit.

 

 

If you drink by putting your mouth on a PET bottle, saliva enters the water, and bacteria in the saliva rapidly multiply.

 

Water contaminated with bacteria can cause abdominal pain, nausea, and food poisoning.

 

Especially during hot summer days, bacteria reproduce more rapidly.

 

It is known that a single bacterium can multiply to 1 million in just 4 to 5 hours.

 

Furthermore, PET bottles, once opened, also pose a risk of bacteria from the air contaminating the bottled water.

 

Do not drink bottled water stored in PET bottles for more than one day.

 

If you can't drink it all at once, you should pour it into a cup and drink it.

 

Reusing PET bottles after drinking water should also be avoided.

 

As a result of testing 500mL bottled water reused by accommodation establishments in Seoul, bacteria exceeding 50 times the standard limit were detected.

 

Meanwhile, even bottled water that has not been opened can deteriorate over time.

 

This is because some microorganisms in the water, permeable substances entering from outside, harmful substances caused by high temperatures or direct sunlight, and odors can all have an effect.

 

Therefore, the expiration date must be strictly followed.

 

The Drinking Water Management Act considers the expiration date of bottled water to be six months.

 

Some bottled water imported from abroad can be distributed for up to about two years.