OC Watersheds Santa Ana River Watershed
The Santa Ana River Watershed is the largest in Orange County, covering 174.6 square
miles. The river begins almost 75 miles away in the San Bernardino Mountains, crossing
central Orange County before emptying into the Pacific Ocean. The Orange County
portion of the watershed includes portions of the cities of Anaheim, Brea, Huntington
Beach, Orange, Placentia, Santa Ana, Villa Park, and Yorba Linda. The river serves
as the main tributary to the watershed with Santiago Creek being the largest tributary
within Orange County.
For more information about this watershed contact
Beatrice Musacchia
City and County Boundary Map
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