In the San Bernardino Mountains, an intricate maze of pipes collects and funnels tens of millions of gallons of water each year, which is the original source for Nestle’s Arrowhead Water. Larry Lawrence, who manages the spring for Nestle Waters, said it is a naturally flowing source. They do not pump anything, siphon anything. It just naturally flows. Spring water collects in a tunnel and moves downhill through a pipeline. At the bottom, tanker trucks load and transport it to a nearby plant, where the water is bottled.