...summary, we may say that our problem as a Nation is that of making the relatively fixed supply of water meet a rapidly increasing demand by providing the right quantity of water of the right quality when and where it is needed. As time goes on, the element of quality control is going to be crucial...

...situation : The water resources problem confronting the United States from now on is one of making its supply meet a rapidly increasing demand by providing...right quantity of water of the right quality where and when it is needed. The Federal interest goes on from where the interests of State and local governments...