Isotopic prospection in high vulnerability area of the Milano province (Northern Italy)

A hydrogeochemical prospection has been carried out in the Milano province with the purpose to better identify and characterize Nitrogen pollution sources. A network of 90 wells has been considered for geochemical prospection and 37 wells were also considered for isotopic survey. A geochemical stratific ation both in chemical characters and in isotopic ones ha s been identified and related to local pollution ph enomena. The organic character of Nitrogen pollution phenomena has been identified and related to vulnerability characters of surveyed area. The obtained results a llow to improve previous vulnerability mapping methods.