In many world regions Intermittent Water Supply (IWS) systems are prevalent. IWS systems can be defined as piped water supply service that is available to consumers less than 24 hours per day. In an IWS situation, the consumers usually secure their water supply through the use of ground or roof tanks, where water is stored during the length of time that the supply is provided. Learn more: iwa-network.org/groups/intermittent-water-supply-iws/