The Rainbow Municipal Water District is at the end of a vast and expensive water delivery system that stretches hundreds of miles. This system takes water from where it is more plentiful in the Rocky Mountains and Northern California, and brings that water to Southern California through a series of aqueducts, serving over 7,200 meters to portions of Fallbrook, Pala and Bonsall. Water from the Rocky Mountains is diverted from the Colorado River and transported 241 miles to San Diego County through the Colorado River Aqueduct. On an average, approximately 75% of the water imported into San Diego County arrives from the Colorado River.Water from Northern California is diverted from the Sacramento River Delta