Clean water is becoming an increasingly scarce commodity. Sustainable buildings aim to develop systems to minimise the consumption and pollution of this resource. Careful design is used to develop rainwater harvesting, plumbing and ecological sanitation systems that enable buildings to be self-reliant for their water needs and avoid polluting water. This reduces the requirement for large-scale water and sanitation infrastructure that consumes energy and can be wasteful.
High-performance sustainable water systems in buildings are therefore becoming more important. An introduction to objectives, characteristics and calculations used to design these systems can be accessed here.