In recent years the practice of rainwater harvesting has emerged as a water conservation method promoting an alternative water supply source. Additionally, excessive quantities of rainwater may damage buildings, hardscapes and vegetation on the proposed site and adjacent properties. Rainwater can be captured in diverse ways, from small-scale rainwater harvesting techniques, where water is possibly collected from rooftops, to large-scale diversion of stormwater from streams and reservoirs. Utilizing captured rainwater offers the potential for an alternative water supply for non-drinking purposes and can reduce pollution in waterways. Rainwater once harvested and treated can be used for many purposes including: irrigation, aquifer recharge, toilet flushing and janitorial uses.