Dear Student
Untreated human excretions are a health hazard. It causes pollution of soil and water including the underground water. Thus, it contaminates the sources of water from which people collect water for drinking and household purposes. When this contaminated water is used for drinking, it can cause diseases such as cholera, typhoid, hepatitis, dysentery, etc., which may even lead to death.
Human waste is considered a biowaste or bioproduct as it is a vector for both viral and bacterial diseases. It can be a serious health hazard if it gets into sources of drinking water.
Regards