A common cause of dirty water includes the dumping of waste and sewage into water supplies. The practice of open defecation that seeps into water supplies is also a common factor of dirty and unsafe water.
The most common waterborne diseases include cholera, which is caused by bacterial infections and induces severe attacks of diarrhea, often leading to dehydration. Arsenicosis causes painful skin trauma. Trachoma is also caused by a lack of adequate water supply and unsafe sanitation conditions. Malaria is caused by parasites which are carried by a certain type of mosquito, and typhoid fever can be caused by consuming contaminated water.