Cisterns can be attractive sign of a commitment to water conservation. The Lady Bird Johnson National Wildflower Research Center in Austin collects rainwater in a series of cisterns. Rainwater from the central rooftop of nearly 17,000 square feet feeds two 20,000-gallon cisterns and the 5,000-gallon tower cistern. Several other cisterns ass to the total capacity of 65,000 gallons. With an average rainfall of 30 inches annually, these systems can collect more than 300,000 gallons of rainwater every year.
© Barbara Harper