Water source fields of drinking water safety project in rural area of Nanchang, Jiujiang and Shangrao were investigated.It shows that quality of drinking water source is good and reach the national standard of level three. But concentration of total phosphorus and bacteria in surface water exceeds standard, as well as that of manganese in ground water in some places. The pollutant comes from agricultural non-point source pollution, and production activities and wastewater discharge of industrial and mining enterprises. Water source protection in rural area of northern Jiangxi needs to be strengthened by efforts in aspects of technology and management.