California’s water touches nearly every part of daily life, but most people never stop to think about where it comes from. From mountain snowpack to vast reservoirs and underground aquifers, the state’s water travels an extraordinary journey before reaching homes, businesses, and farms. In this explainer, we’ll break down the complex system that delivers water across California, including the rivers, aqueducts, and infrastructure that move billions of gallons each year. Along the way, you’ll learn why geography, climate, and careful management all play a role in keeping water flowing.