CC/WE: Water efficiency in new developments

4.15. This policy recognises the increasingly importance of potable water scarcity in the region and sets out measures to reduce potable water consumption in new development as follows:
 Residential developments should be designed to achieve a standard of 80 litres/person/ day unless demonstrated impracticable.
 Non-residential development will be required to achieve full credits for category Wat 01 of BREEAM unless demonstrated impracticable.
4.16. North Cambourne will therefore aim to reduce potable water consumption to the levels set out above by utilising low flow fixtures and fittings throughout the development.
4.17. It is unlikely that the 80 litres per person per day target will be achievable through low flow fittings alone. The potential to include rainwater harvesting will therefore be investigated in more detail, rainwater harvesting systems could be employed at a building level or used in conjunction with the site-wide Sustainable Urban Drainage Systems (SuDS) features to provide a centralised rainwater collection system to be used in washing machines and toilet flushing.