What areas of the county are in the San Diego Bay watershed?
The San Diego Bay watershed encompasses a 415 square mile area that extends more than 50 miles to the east – all the way to the Laguna Mountains. A large part of the watershed land area lies north of the border with Mexico and south of Interstate 8. The major water courses feeding San Diego Bay include the Sweetwater River, the Otay River, Chollas Creek, Paleta Creek, Paradise Creek, and Switzer Creek. The headwaters of the watershed being in the unincorporated area of the County and then transects all or portions of 7 cities, namely, San Diego, National City, Chula Vista, Imperial Beach, Coronado, Lemon Grove, and La Mesa. Nearly half of the population of San Diego County lives and works in the San Diego Bay Watershed. And most of these people live and work in close proximity to San Diego Bay itself – certainly one of the finest natural resources in the region, the State, and the nation. The San Diego Bay watershed is comprised of 3 hydrologic units: the Pueblo San Diego, Sweetwater,
