Important features of this book is to analyze the physico-chemical and microbial attributes of water reservoirs used for supply of water in district Dungarpur (Rajasthan) through different seasons of the year, and generate the field survey data of economic and educational status, the drinking water sources and its accessibility, status of water treatment before using and practice of hygiene and sanitation of the populace here. The data from all the government hospitals of district on patients admitted with gastrointestinall illness usually owing to unsafe drinking water and improper sanitation was also procured.