Open defecation is practiced by more than 600 million Indians, according to the World Health Organization. The WHO calls open defecation the riskiest sanitation practice of all due to the ease of disease spread. More often than not, water is contaminated by the same people who drink it. Open defecation is rampant in slums and rural areas because alternatives simply don’t exist as pit toilets and flush or pour toilets are found primarily in urban areas. In the slums and rural areas, there might be public toilet areas, however, due to long lines and privacy concerns, many residents still wait until nightfall to go –increasing the risk of related violence, especially against women and girls.
Read Here – Scientific American