The study analysed that water pollution and water borne diseases. Water is one of the most important natural resources for all living organisms. Water pollution is a serious threat around the globe. Water pollution is generally referred to contamination of natural water resources. Man has polluted much of this limited quantity of water with sewage, industrial wastes and wide array of synthetic chemicals. Water-borne diseases are infectious diseases spread primarily through contaminated water. The present study was carried out Coimbatore district in TamilNadu.

This study presents a global analysis of urban water supply vulnerability in 71 surface-water supplied cities, with populations exceeding 750 000 and lacking source water diversity. Vulnerability represents the failure of an urban supply-basin to simultaneously meet demands from human, environmental and agricultural users. We assess a baseline (2010) condition and a future scenario (2040) that considers increased demand from urban population growth and projected agricultural demand. We do not account for climate change, which can potentially exacerbate or reduce urban supply vulnerability.

California saw its driest year on record in 2013, and the drought is expected to continue into the foreseeable future. More than ever, urban water managers are seeking effective strategies to address water scarcity, with increasing interest in reducing residential water demand. To help achieve these goals, researchers at UCR’s School of Public Policy have partnered with local water agencies in an effort to evaluate the effectiveness of ongoing residential water conservation programs. Two general messages have emerged from from these partnerships to date.