Development of quality-based water supply in China

Following the exacerbation of imbalance between water supply and demand and the deterioration of water quality in a part of cities in China,more and more attention is gradually paid to the optimum utilization of high quality water,and then the replacement of the integrated water supply by the quality-based water supply(dual water supply;similarly hereinafter)becomes an inevitable trend of the social development.The quality-based water supply is classified herein in accordance with the quality,scale,area and mode of water supply.Combined with the classification,the development history of the quality-based water supply is introduced and is expatiated from the aspect of the quality-based water supply for the utilizations such as industrial and domestic uses,the reclaimed water and tap water,the tap water and purified water,the supply for urban range,etc.Finally,the main existing problems from the aspects of water quality,water price,negative effect,etc.of the quality-based water supply are summarized as well.