Food goes bad when left for too long, and water becomes stale. Therefore, people are generally accustomed to eating fresh food and drinking fresh water, but bottled water should not be consumed when it is "fresh".
The bottled water sold on the market, whether it's distilled water, reverse osmosis water, mineral water, or other purified water, is typically filtered and disinfected multiple times during the production process. However, before being filled into the bottle, it is generally treated with ozone as a final disinfection step. Therefore, newly filled bottled water will contain a relatively high concentration of ozone.
Although ozone has a strong disinfecting effect, its strong oxidizing nature is very harmful to human health. When inhaled into the body, ozone destroys vitamin E in the skin, causing wrinkles and dark spots. In severe cases, it can also damage the body's immune function and induce lymphatic diseases. Therefore, if you drink bottled water while it is "fresh," you will undoubtedly ingest these harmful substances along with it. The best approach is to leave the fresh bottled water for 1-2 days for the ozone to dissipate before drinking it.
Furthermore, bottled water is not necessarily a healthy and safe option for drinking, especially when used with a water dispenser. The water outlet, inlet, and drain valve of a water dispenser can easily allow microorganisms and other particles from the air to enter the water bottle, causing secondary contamination of the water. The Guangdong Provincial Key Laboratory of Environmental Resource Utilization and Protection found through sampling and testing that under normal room temperature, the count of harmful bacteria in the water dispenser was zero on the first day, but it soared to 8,000 by the tenth day! This is sufficient proof that bottled water is subject to severe secondary contamination.
To prevent drinking water that has been secondarily contaminated, the best method is to heat the water before drinking. To prevent the water from being repeatedly boiled, which produces large amounts of nitrite that is harmful to the human body, consumers should try to purchase boiling-type water dispensers when choosing one. This type of dispenser uses a microcomputer to separate hot and cold water, maintaining an accurate and stable water temperature, ensuring that the water consumed is clean and healthy.