Sweetwater River (California)

Sweetwater River
Agua Dulce
The river's upper reaches near State Route 79
Map of the river basin
EtymologyKumeyaay; "Ah-ha Ooo-mulk" meaning "water sweet"
Spanish; "Agua Dulce" meaning "sweet water"
Location
CountryUnited States
StateCalifornia
RegionSan Diego County
CitiesDescanso, La Presa, Bonita, National City, Chula Vista
Physical characteristics
SourceUpper Green Valley
  locationCuyamaca Mountains
  coordinates32°59′03″N 116°32′04″W / 32.98417°N 116.53444°W / 32.98417; -116.53444
  elevation4,809 ft (1,466 m)
MouthSweetwater Marsh
  location
Between National City and Chula Vista
  coordinates
32°38′34″N 117°06′53″W / 32.64278°N 117.11472°W / 32.64278; -117.11472
  elevation
13 ft (4.0 m)
Length55 mi (89 km)
Basin size230 sq mi (600 km2)
Discharge 
  locationmouth
  average14.7 cu ft/s (0.42 m3/s)
  minimum0 cu ft/s (0 m3/s)
  maximum45,500 cu ft/s (1,290 m3/s)
Basin features
Tributaries 
  rightNorth Fork Sweetwater River

The Sweetwater River is a 55-mile (89 km) long stream in San Diego County, California. From its headwaters high in the Cuyamaca Mountains, the river flows generally southwest, first through rugged hinterlands but then into the urban areas surrounding its mouth at San Diego Bay. Its drainage basin covers more than 230 square miles (600 km2), all of it within San Diego County.

Towns on the river include Descanso, La Presa and Chula Vista. The term "Sweetwater" is a name often given to freshwater which tastes good in regions where much of the water is bitter to the taste. The Spanish called the river "Agua Dulce", a name they applied to good clear water anywhere they lived.