The California Green Medal is presented by the California Sustainable Winegrowing Alliance, California Association of Winegrape Growers, Wine Institute, Lodi Winegrape Commission, Napa Valley Vintners, Napa Green, Sonoma County Winegrowers and Vineyard Team. California vineyards and wineries that participate in a sustainability program in California are eligible to receive one of four award categories (Leader, Environment, Community and Business) that recognize outstanding achievement in sustainability. A judging panel of wine and sustainability experts make the final selections and winners are recognized at an awards ceremonies hosted by the winners.