Water is technically considered a renewable resource because it can be used over and over again and it has a rain cycle. However, it is only in the short-term that water can be thought of as a renewable resource and the sustainability of this renewable resource is questionable.ne of the main reasons that water may become a non-renewable source is the population growth. The population is expanding at a speedy rate, and this is putting enormous pressure on all our resources, even the renewable ones.