Which is the best quality drinking water: bottled water, water from a vending machine or water treated with a filtration system?
It depends on the particular kind you choose. If you buy the right kind of bottled water, its quality will be relatively high; however a few bottled waters are worse than tap water. Most water from vending machines is of slighlty higher quality, but it is important to pick the right machines. Water fitration systems vary from extremely good to very bad; in fact some purifiers actually add toxic substances to the water. The effectiveness of a purifier/filtration system often depends on correctly matching it to your particular water conditions. In general, the best water filtration system will give you the purest water.
