Water Quality Association

Water Treatment For Dummies

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4 vapor condenses, it falls back to the surface again as rain, sleet, or snow. The process repeats itself in a never-ending cycle. Figure 1-1: The water cycle. The water we consume and use every day comes from two main sources: groundwater and surface water. Other sources such as snow melt, rain, and recycled wastewater have only limited use, but they're getting more attention these days because of water scarcity issues in dry cli- mates. Just 1 percent of all water is accessible. These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited.

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