California is one of the largest wine-growing regions in the world. According to California Wines, more than 60% of Californian vineyards are now certified sustainable; more than 82% of the volume is produced there. As a result, eight out of ten bottles of wine come from sustainably certified production.
California's sustainability efforts encompass four categories: organic, biodynamic, sustainable, and regenerative viticulture practices. The "sustainable" certified areas aim to contribute to a healthy environment and also include social components. In regenerative viticulture, the goal is to improve soil health while counteracting the impacts of climate change, without relying on synthetic substances, and enhancing biodiversity.
For comparison: New Zealand has approximately 96% of its vineyards sustainably certified, although the standards there are lower than e.g. those for German organic wine, which accounts for about one-tenth of the domestic vineyard area. PD
