Water is needed in commercial buildings for a variety of reasons. People require it for drinking while some is also needed for sanitation. Building systems require additional water, particularly for hydronic heating and cooling systems or for landscape irrigation. As long as water is properly contained and channeled in all of these systems, then it can be used efficiently consistent with water conservation standards. However, if a leak or some other malfunction occurs, then water is wasted or can cause damage. This is a particular concern in green building design where the use of water is intended to be monitored and controlled.