Basic Information about water..
Raw and untreated water is obtained from an underground aquifer (usually through wells) or from a surface water source, such as a lake or river. It is pumped, or flows, to a treatment facility. Once there, the water is pre-treated to remove debris such as leaves and silt. Then, a sequence of treatment processes — including filtration and disinfection with chemicals or physical processes — eliminates disease causing microorganisms.When the treatment is complete, water flows out into the community through a network of pipes and pumps that are commonly referred to as the distribution system. Approximately 85% of the U.S. population receives its water from community water systems. Community water systems are required to meet the standards set by the U.S. Environmental Protection Agency (EPA) under the authority of the Safe Drinking Water Act (SDWA).
How Much Do You Use?
A typical American uses 80-100 gallons of water every day. If that sounds like a lot, consider that the total includes not just drinking water, but also the water used for washing, watering lawns, and waste disposal. In fact, people actually drink less than 1% of the water coming into their homes. The rest goes for other purposes.
.Surface water flows through or collects in streams, rivers, lakes, reservoirs and oceans — not underground like groundwater. Surface water can be beautiful, even pristine-looking, but most of it isn’t directly fit for drinking. Fully 97% is found in the oceans and can’t be used for drinking because of its salt content. The other 3% of water is fresh, and most of that is locked up in ice or glaciers.
Water is a molecule called H2O that contains two atoms of hydrogen and one atom of oxygen. It’s a transparent, odorless liquid that you can find in lakes, rivers and oceans. It falls from the sky as rain or snow.Fresh water is the result of the Earth’s water or hydrologic cycle. Basically, the sun’s heat causes surface water to evaporate. It rises in the atmosphere, then cools and condenses to form clouds. When enough water vapor condenses, it falls back to the surface again as rain, sleet, or snow. The process repeats itself in a never-ending cycle.