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USGS 11098000 ARROYO SECO NR PASADENA CA

  Stream Site

DESCRIPTION:
Latitude 34°13'20",   Longitude 118°10'36"   NAD27
Los Angeles County, California, Hydrologic Unit 18070105
Drainage area: 16.0 square miles
Datum of gage: 1,397.88 feet above   NGVD29.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1988-10-01  2025-11-08  
 Daily Data
    Discharge, cubic feet per second  1910-12-01  2025-11-07  41540 
 Daily Statistics 
    Discharge, cubic feet per second  1910-12-01  2024-12-03 41203 
 Monthly Statistics 
    Discharge, cubic feet per second  1910-12  2024-12  
 Annual Statistics 
    Discharge, cubic feet per second  1911  2025  
 Peak streamflow 1914-02-20  2024-03-02  111 
 Field measurements 1938-03-02  2025-08-06  435 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 2009-09-10  2009-12-08  4 
 Water-Year Summary 2005  2024  20 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS California Water Science Center
Email questions about this site to California Water Science Center Water-Data Inquiries