The six hazards of bottled water are no safer than tap water! 1.It is difficult to track the water source and ensure the water quality. 2.Bacteria and viruses will breed. If the water dispenser is not disinfected regularly, bacteria and viruses will breed. On weekdays, when we change barrels of water, we all see that bubbles of bacteria dissolve into the water and multiply rapidly in the water. 3.Poor quality barrels may contain carcinogens. 4.Ozone residue. All barreled water is disinfected by ozone. Ozone residue produces carcinogen bromate, which is chronically harmful to the body. 5.Black heart water and black heart bucket are harmful to health. 6.The secondary pollution of barreled water transportation is inevitable, "secondary pollution" that is common in barreled water is inevitable. Due to the influence of time, climate, environment and personnel quality during the whole water delivery process, the possibility of "secondary pollution" is great. 4 stage filter water dispenser will help you solve the problem. Hot and cold water for your choice,meet your drinking water needs.