San Luis Rey Watershed
From SDCK Watershed Wiki
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The San Luis Rey River Watershed is located in northern San Diego County. It is bordered to the north by the Santa Margarita River Watershed and to the south by the Carlsbad and San Dieguito River Watersheds. The San Luis Rey River originates in the Palomar and Hot Springs Mountains, both over 6,000 feet above mean sea level, as well as several other mountain ranges along the western border of the Anza Borrego Desert Park. The river extends over 55 miles across northern San Diego County forming a watershed with an area of approximately 360,000 acres or 562 square miles. The river ultimately discharges to the Pacific Ocean near the City of Oceanside. Of the nine major watersheds in the San Diego region, the San Luis Rey is the third largest.
 | Watershed monitoring sites by San Diego Coastkeeper |
 | Formerly monitored sites by San Diego Coastkeeper |
 | Beach water monitoring sites by County DEH |
 | Beach water monitoring sites by wastewater agencies |
Coastkeeper Monitoring Sites in San Luis Rey Watershed
San Diego Coastkeeper currently conducts monthly water quality monitoring at the following 6 sites in the San Luis Ray watershed.
SLR-010 : San Luis Rey River under Pacific Coast Highway Bridge
SLR-030 : San Luis Rey River at Douglas Ave Bridge
SLR-040 : San Luis Rey River near Mission Ave where Hwy 76 crosses SLR
SLR-050 : San Luis Rey River at Old Hwy 395 bridge, W side of Interstate 15
SLR-070 : Gomez Creek from Rice Canyon
SLR-080 : Pauma Creek
Sites monitored in the past are as follows:
SLR.2 (SLR-020): San Luis Rey River at Shearer Crossing
SLR.6 (SLR-060): San Luis Rey River at Couser Canyon bridge
SLR.9 (SLR-090): San Luis Rey River at CNF picnic site near Lake Henshaw
Beach Water Quality Data
Watershed Information
Hydrologic Areas in San Luis Rey Watershed
Hydrologic Unit: 903.11 - 903.32
Hydrologic Areas: Lower San Luis 903.1 ; Monserate 903.2 ; Warner Valley 903.3
Major Water Bodies: (i)San Luis Rey River (ii)Lake Henshaw
Impaired Water Bodies in San Luis Rey Watershed
CWA 303(d) List :
| Waterbody | Pollutant/Stressor |
|---|---|
| Guajome Lake | Eutrophic |
| Pacific Ocean Shoreline | Indicator Bacteria |
| San Luis Rey River | Chloride, Total Dissolved Solids |
Watershed Land Use
Land Use by type
| Type | Share of Watershed |
|---|---|
| Residential | 14.0% |
| Commercial | 3.4% |
| Parks & Open Spaces | 68.0% |
| Golf Course | 0.6% |
| Agriculture | 13.0% |
| Under Construction | 0.0% |
| Industry | 0.3% |
Watershed Captains in San Luis Rey Watershed
1.Frank Kawasaki
2.Jack Marshall
3.Sandi Jacobson
Watershed Studies and Reports
San Luis Rey River Basin Assessment - Coastal Watershed Planning and Assessment Program - 2008 Draft
Surface Water Ambient Monitoring Program (SWAMP) Report on the San Luis Rey Hydrologic Unit - 2007
Watershed Resources
Mission Resource Conservation District
The Santa Margarita and San Luis Rey Watersheds Weed Management Area
