In 2012 was performed, for the city of Nepi, the study of areas of safeguard of the well for drinking water in the locality of “Il Concio” according to the law (DRG 5817/99), on an area of 2 km radius from the well. The study included geological, geomorphological and hydrogeological investigation, with the census of wells and springs, centers of danger, the pumping tests for transmissivity and hydraulic conductivity and the analysis of acquifer vulnerability by DRASTIC method up to detecting the boundaries of protection (absolute, respect and wide protection areas). To detect the safeguard zoning was used the methods of J. Bear, for 60 days (absolute area) and 360 days (respect zo/ne). The map of vulnerability is the final map of the study.O