Abstract: Environmental safety of drinking water has become one of the most important tasks in environmental protection. Risk prevention for the drinking water sources is a fundamental way to protect the safety of the water source. The key for risk prevention of the drinking water sources is to identify the risk of drinking water source, especially the non-point source pollution risk. However, it is difficult to obtain the information of the non-point source pollution risk through the conventional observational/statistical methods. Since remote sensing is a means of macro observation, it has the ability to instantaneously and easily retrieve surface information of water sources. The non-point source pollution risks of 25typical drinking water source protection areas were mapped based on the high spatial resolution satellite data using the methods of manual interpretation combined with object-oriented classification. Furthermore, non-point source pollution risks index (NPPRI) was calculated for the typical water sources. We made the following observations:firstly, the residential areas, mining land, and farmland were widespread in the protection zone of water sources in China. The aquaculture site, tourism land, livestock and poultry farming areas existed in part of water sources. Secondly, according to their risks drinking water source can be divided into five groups, high (12%), relative high (4%), slightly high (44%), moderate (20%) and low (20%), respectively. In other words, the percentage of drinking water sources with the medium and low risk was 40% and the high and more serious risk was accounted for 60%. Thus, it is obvious for the potential risks of non-point sources of water sources. Furthermore, the maximum and minimum values of NPPRI were 42.0and 0.8respectively. This result showed that the difference of the non-point source pollution risk is significant or water source, which is needed to pay more attention. Lastly, the non-point source pollution risks index was not related to the water source protection area at all and no clear spatial distribution patterns of the non-point pollution risk of various water sources is found. The non-point source pollution risk was related to the attention from the local water source administrations, and the distance from the water source to the city.