(2) Pure water (distilled water, space water) removes all harmful substances and elements. If pure water is used for drinking and cooking, all kinds of trace elements in the water are gone, which may be potentially harmful in the long run. Used to make tea, keep the tea taste good, but not suitable for repeated use. Especially for the elderly and children, it is not suitable for long-term drinking.
(3) filtered tap water. The tap water treated from the waterworks has been monitored for 35 items such as bacteria, but the water from the water pipe network and water tank to the faucet is best filtered by a simple and economical activated carbon purifier.
Pay attention to daily water use. Drain the accumulated water in the water pipe overnight in the morning. Drinking water can be used for several hours (but not more than one day). Aged old water stored for more than 3 days is not suitable for drinking because its molecular structure has not been deformed by impact. Boiling water usually boils for 3 minutes. Don't cook for too long. It is not good to cook or cook for too long. Water that has been boiled repeatedly and stored in a thermos for several days is not suitable for drinking.