WATER, THE HYDROLOGIC CYCLE

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THE HYDROLOGIC CYCLE
Nature has its own method of purifying water.

Water is the fundamental component of our eco-system. No other resource is more important to man than water; it sustains all life and is crucial to our existence. Roughly 2/3 of our planet is water but less than 1% is available as fresh water. 80% of the earth's surface is water:

More than 97% of this water is in the oceans.
2% is locked in polar icecaps.
Less than 1% is in freshwater lakes, streams and wells.

The hydrologic cycle is the earth's natural method of cleansing water. The earth, sun and atmosphere all work together imitating a distiller. It is the largest water purification system known to man.

In this cleaning process, surface water evaporates from streams, lakes, etc. and rises to the sky in the form of vapor. The vapor condenses into clouds.

When the condensation in the clouds are heavy enough, it falls to earth as rain, snow etc. About 70% of the water will evaporate again. The remaining 30% will replenish surface water. Throughout the hydrologic cycle, water changes from pure to impure and back to pure again.

EVAPORATION
Surface water is heated by sunlight and evaporates into vapor that ascends into the atmosphere. This is the purest naturally occurring water.
CONDENSATION
When water vapor condenses in the atmosphere, it forms a cloud. The cloud becomes increasingly ?dirtier? by picking up impurities - usually in the form of dissolved gases. This atmospheric water is acidic and aggressive. ?Acidic? water tends to dissolve virtually all minerals it comes in contact with.
PRECIPIATION
The acidic water returns to earth as precipitation (rain, snow, sleet, etc.).
INFILTRATION
The water picks up sediment and dissolved minerals as it seeps through the soil becoming hard, brackish and contaminated to varying degrees.
EVAPORATION
The water eventually heats again and the cycle repeats.

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Water Facts & Information The Hydrologic Cycle About Water Quality Hard Water Map Water Supplies Your Water Usage

Testing Your Water

Water Facts & Information
The Hydrologic Cycle
About Water Quality
Hard Water Map
Water Supplies
Your Water Usage