Some health-conscious people are buying bottled water to avoid contaminants in ordinary tap water. However, researchers point out that it cannot be assumed that bottled water is entirely safe. Bottled water may contain the very same bacteria found in tap water, and the longer the water is stored, the greater the opportunity the bacteria have to multiply.
Bottled water is not kept refrigerated, and the warm storage temperatures provide a favorable environment for bacterial growth. Bottle caps may be contaminated at the time of bottling, and often no attempt is made to disinfect the water or the container the water is bottled in. The longer the water is bottled the greater the risk of bacterial growth.
The researchers suggest that bottled water be dated, as many foods are, so that the consumer can have some idea of how old the water is. (The Physician and Sportsmedicine 18(1)49, January 1990)
Copyright 1990 Phylis A Austin