Zero Tolerance for Domestic Violence, an initiative of the Contra Costa County Board of Supervisors, is a public/private partnership designed to reduce domestic violence, family violence, elder abuse, and human trafficking in Contra Costa County. Authorized by the California legislature as the first Zero Tolerance for Domestic Violence county (SB 968), the initiative is aligning policies, practices, and protocols; coordinating services; and creating a climate where violence and abuse are not tolerated. Korwin Consulting worked with Zero Tolerance to strengthen the initiative’s evaluation practice, with an aim to building more effective strategies.