Scarcity of water is a widely observed and discussed phenomenon.
Benchmark large reductions with a network of water meters increasing use consciousness & stubbing leakages. Screens, tickers, apps & general signage can be used to increase visibility of use along with optimum habits and their relative impacts.
Design-use is typically reduced with low-flow fixtures and clinical design of irrigation systems.
Government regulations have played a large role in bringing efficiency with Rain Water Harvesting [RWH] and Sewage Treatment Plants [STPs] becoming mandatory for projects. A zero-discharge site ensures 100% rainwater is reused or recharged and similarly STP treated water be reused for flushing, landscape etc.
Convenience for drinking water is increased with a central treatment plant to control quality and earmarked points of dispensing [indoor & outdoor]
Reduce, recycle & reuse is the mantra...