The document provides information on rainwater harvesting, greywater reuse, and water-efficient gardening. It discusses: - Using rainwater to reduce reliance on city water supply and costs, as well as emissions. - Tank types and sizing tanks based on end use of the water. - Methods to keep harvested rainwater clean like screening, first-flush diverters, and floatint intakes. - Pumping, filtration and UV sterilization systems to clean greywater for reuse. - Legal requirements for rainwater harvesting and greywater systems. - Planting water-wise species and using mulch and compost to reduce water needs in gardens.