In 2004, the enHealth Council developed national guidelines due to increased interest in using domestic rainwater tanks in both rural and urban areas. This increased interest has arisen because of widespread drought conditions, predictions of worldwide shortages of fresh water as populations continue to grow, and increased water restrictions. These guidelines consolidate the most up-to-date information and advice as a resource for Environmental Health Officers and other professionals, and for those members of the public seeking detailed guidance.

Information is provided on the range of potential hazards that can threaten water quality, preventive measures that can be used to prevent these hazards from contaminating rainwater, and straightforward monitoring and maintenance activities.

Collection and storage of rainwater involves relatively simple systems. A reasonably low level of management can ensure provision of good quality water that can be used for a wide range of purposes including drinking, food preparation, bathing, laundry, toilet flushing and garden watering. The guidelines include information on design and installation as well as the potential contribution of rainwater tanks to improved water conservation.