Pure water is very much needed for the earth

Water pollution occurs when unwanted materials enter in to water, changes the quality of water and harmful to environment and human health . Water is an important natural resource used for drinking and other developmental purposes in our lives . Safe drinking water is necessary for human health all over the world. Being a universal solvent, water is a major source of infection. According to world health organization (WHO) 80% diseases are water borne. Drinking water in various countries does not meet WHO standards . 3.1% deaths occur due to the unhygienic and poor quality of water..

Hepatitis is a viral disease caused by contaminated water and infects the liver. Jaundice, loss of appetite, fatigue, discomfort and high fever are symptoms of hepatitis. If it persists for a long time it may be fatal and results in death. Vaccine is available for hepatitis and by adopting good hygienic practice; one can get rid of this disease. Encephalitis is inflammatory disease spread by bite of infected mosquitoes. Culex mosquito lays their eggs in contaminated water. Most people don’t show any symptoms but some symptoms are headache, high fever, muscle stiffness, convulsions however in severe cases coma and paralysis results. No vaccine is available for this disease..

There is a greater association between pollution and health problem. Disease causing microorganisms are known as pathogens and these pathogens are spreading disease directly among humans. Some pathogens are worldwide some are found in well-defined area. Many water borne diseases are spreading man to man . Heavy rainfall and floods are related to extreme weather and creating different diseases for developed and developing countries. 10% of the population depends on food and vegetables that are grown in contaminated water . Many waterborne infectious diseases are linked with fecal pollution of water sources and results in fecal-oral route of infection . Health risk associated with polluted water includes different diseases such as respiratory disease, cancer, diarrheal disease, neurological disorder and cardiovascular disease . Nitrogenous chemicals are responsible for cancer and blue baby syndrome . Mortality rate due to cancer is higher in rural areas than urban areas because urban inhabitants use treated water for drinking while rural people don’t have facility of treated water and use unprocessed water. Poor people are at greater risk of disease due to improper sanitation, hygiene and water supply . Contaminated water has large negative effects in those women who are exposed to chemicals during pregnancy; it leads to the increased rate of low birth weight as a result fetal health is affected..