National appliance standards cover products ranging from refrigerators to commercial air conditioners to electric motors. Most of today’s national standards started out at the state level. Even when state standards do not become national ones, adoption by just a few states can be enough to affect national markets. This report examines the opportunity for states to again take the lead in advancing appliance standards to save energy and water, lower utility bills for consumers and businesses, and reduce air pollutant emissions. We provide recommendations for state standards for 21 products and state-by-state estimates of potential savings.