Methodology for National Water Savings Model and Spreadsheet Tool—Outdoor Water Use

Author(s): Williams, Alison, A; Chen, Yuting; Dunham, Camilla; Fuchs, Heidi; Stratton, Hannah | Abstract: This report describes the method Lawrence Berkeley National Laboratory (LBNL) developed to estimate national impacts of the U.S. Environmental Protection Agency’s (EPA’s) WaterSense labeling program for weather-based irrigation controllers (WBIC). Estimated impacts include the national water savings attributable to the program and the net present value of the lifetime water savings for consumers of irrigation controllers.