The widespread depravation of the global water environment has caused pollutions and safe problems of drinking water resources, especially in big cities.

Water pollution analysis of drinking water source in urban district of Yan'an with method of improved Euclidean cluster;

Water quality analysis of main drinking water source of Kunming;

Water quality of public drinking water sources in some key cities of main environmental protection in China.;

The eutrophic state and water quality of 12 drinking water resources were evaluated by using the comprehensive nutritive index.

Through an analysis to the causes of the drinking water pollution in countryside ,the paper points out the harm it does to the people's health and the necessity and emergency to protect the drinking water resources, and it also presents some protection methods for drinking water resources in the countryside.

From the prospective of protection of drinking water resource , the author accesses the scarcity of the legal system in china and analyzes the necessity to rebuild the legal system to protect drinking water resource.

This article has analysed the current situation of the drinking water source of the Tanghe Reservoir,determined the causes of the water pollution,and suggested the method to protect the surface water and the drinking wate

This thesis introduces basic situation of drinking water of Jiangsu Province.

Source of drinking water deficiency and pollution give rise to crises,which hazards the right of existence and life.