The drainage from the residential houses, industrial and agriculture such as farm animals into rivers, streams, without treatment. Or reduce contamination of waste water before. Causing such problems. The dirty drain into the river. Most of the informed source water lost from activities in urban parts of the river basin. The rest of the Chao Phraya River approximately 25 is wastewater from factories. Five from agricultural areas and other activities.
An adequate supply of safe drinking water is universally recognized as a basic human need. Yet millions of people in the developing world do not have ready access to an adequate and safe water supply.
Human excreta and the lack of adequate personal and domestic hygiene have been implicated in the spread of many infectious diseases including cholera, typhoid, hepatitis, polio, cryptosporidiosis, ascariasis, and schistosomiasis. It is estimated that one-third of deaths in developing countries are caused by the consumption of contaminated water and on average as much as one-tenth of each person’s productive time is sacrificed to water-related diseases