Water Quality Association

Water Treatment For Dummies

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Chapter 1 What Is Water, Anyway? In This Chapter ▶ Getting water to your tap ▶ Calculating the cost of water W hat is water? Water is a molecule called H 2 O that contains two atoms of hydrogen and one atom of oxygen. It's a transparent, odorless, tasteless liquid that you can find in lakes, rivers, and oceans. It falls from the sky as rain or snow. Water is bottled and sold commercially, but it is also a key ingredient in thousands of products, from lotions and cosmetics to cleaners and beverages. Where Does Water Come From? If you're fortunate, water is all around you, in just the right amounts and in the right places. But it didn't just get there by magic. Ultimately, fresh water is the result of the Earth's water or hydrologic cycle (see Figure 1-1). Basically, the sun's heat causes surface water to evaporate. It rises in the atmosphere, then cools and con- denses to form clouds. When enough water These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited.

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