This tenth edition of the State Energy Efficiency Scorecard measures the progress of state policies and programs that save energy while also benefiting the environment and promoting growth. We use data vetted by state energy officials to rank states in six categories—utility programs, transportation, building energy codes, combined heat and power, state initiatives, and appliance standards. California and Massachusetts tied for first place in this year’s Scorecard. Rounding out the top five were Vermont, Rhode Island, Connecticut, and New York. The most-improved states were Missouri, Maine, and Michigan. The Scorecard shows that energy efficiency is a key resource in these states and others, with utilities spending approximately $7.7 billion in 2015 for efficiency programs nationwide, up from approximately $7.3 billion in 2014.