Tuesday, March 16, 2010

Uses of Water


The uses of water is used for drinking, cooking, bathing etc.,. Plants and animals can not live without water. So, we should not waste the water.


There is 80% of water is there on the earth about 97% of earth's water is in the oceans. only 3% of the earth's water can be used for drinking. 80% of water is frozen in the form of polar ice caps. we can live without water for about 1 week. The water that we use mainly comes from rivers, ponds, lakes and wells. Often sand, dirt, mud, germs etc., make this water unfit for consumption. We call these substances impurities. Impurities are of 2 kinds they are:


  1. Soluable impurities are the ones that dissolves in water (Eg: Salt)

  2. Insoluable Impurities are the ones that do not dissolves in water (Eg: sand)

Water Pollution


water pollution sources into two categories: point and non-point. Point sources of water pollution are stationary locations such as sewage treatment plants, factories and ships. Non-point sources are more diffuse and include agricultural runoff, mining activities and paved roads. Under the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program contr ols water pollution by regulating point sources that discharge pollutants into waters of the United States. EPA works with state and local authorities to monitor pollution levels in the nations water and provide status and trend information on a representative variety of ecosystems.
So, we should not pollute water