Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

Water Quality Samples for California

Click to hide state-specific text

! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.

USGS 11092450 LOS ANGELES R A SEPULVEDA DAM CA

Los Angeles County, California
Hydrologic Unit Code 18070105
Latitude  34°09'42", Longitude 118°27'57" NAD27
Drainage area 158  square miles
Gage datum 655.13 feet above NAVD88
Output formats
Parameter Group Period of Record table
Inventory of available water-quality data for printing
Inventory of water-quality data with retrieval
Tab-separated data, one result per row
Tab-separated data one sample per row with remark codes combined with values
Tab-separated data one sample per row with tab-delimiter for remark codes
Reselect output format
Parameter Group Summary of Available Data
Parameter Group First
Date		 Last
Date		 Number of
Samples		 Number of
Values
All -- include all parameter groups 2021-03-02 2023-11-18 27 364
Information 2021-03-02 2023-11-18 27 157
Physical 2021-03-02 2023-11-18 27 114
Inorganics, Major, Metals 2021-03-02 2021-03-02 1 6
Inorganics, Major, Non-metals 2021-03-02 2021-03-02 1 13
Nutrient 2021-03-02 2021-03-02 1 13
Inorganics, Minor, Metals 2021-03-02 2021-03-02 1 10
Inorganics, Minor, Non-metals 2021-03-02 2021-03-02 1 4
Organics, other 2021-03-02 2021-03-02 1 2
Radiochemical 2021-03-02 2021-03-02 1 1
Sediment 2021-04-22 2023-03-22 17 44