Commercial (or large residential) rainwater harvesting systems can also supply both potable and non-potable needs. Needs may be different for a commercial building than a residential household. Many commercial or large residential buildings prefer to direct rainwater for toilet flushing, especially in buildings with high customer traffic. The soft rainwater is also beneficial for cleaning purposes as less detergent is needed. Water demand, roof size and available onsite storage should be considered when sizing a collection tank.
Water Savings: Rainwater harvesting can conserve water and reduce your water bill. However, these savings depend on the storage capacity of the system as well as proper use and maintenance.
Reduced Runoff: Diverting a portion of roof rainwater runoff can help reduce flooding and erosion in small streams by reducing runoff volume.
Healthier Landscaping: Rainwater does not contain chlorine or fluoride, both of which can be found in tap water and are not necessary for plant growth.