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Bottled water is a part of everyday life for millions of Americans. Per capita consumption in the United States now tops fifteen gallons per year with sales over $5 billion in 2002. Even as fuel prices climb, many people are still willing to pay more for a gallon of bottled water than they are for the equivalent in gasoline. At the same time, bottled water has become a symbol of refined taste and a healthy lifestyle. But despite its growing popularity, many people cannot quite put their finger on just why they prefer bottled water to the much less expensive tap variety. Some have a vague...

This work offers a contribution to protecting our valuable ground-water resources. Divided into three sections, it begins with a basic overview of microbiology, detailing the kinds of microorganisms present, the bacterial growth, metabolism, genetics and microbial ecology in ground-water. Part two discusses microbial abundance and distribution of microorganisms, sampling techniques, biogeochemical cycling and geochemical modeling. Lastly, it deals with microbial processes in aquifers that have been chemically contaminated, a subject of great interest because bioremediation - using...