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


Page Loading - Please Wait...

Click to hideNews Bulletins
  • Due to a lapse in government funding, the majority of USGS websites will not be updated except to provide important public safety information. Websites displaying real-time water data will be updated with limited support. For more information please see www.doi.gov/shutdown.
  • Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

USGS 14211720 WILLAMETTE RIVER AT PORTLAND, OR

  Stream: Tidal stream Site

DESCRIPTION:
Latitude 45°31'03",   Longitude 122°40'09"   NAD83
Multnomah County, Oregon, Hydrologic Unit 17090012
Drainage area: 11,200 square miles
Datum of gage: 1.55 feet above   NGVD29.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1988-10-01  2025-11-03  
 Daily Data
    Temperature, water, degrees Celsius  1975-11-07  2025-11-03  26675 
    Discharge, cubic feet per second  1972-10-01  2025-11-02  19385 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1975-12-02  2025-11-03  23215 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2009-01-22  2025-11-03  18176 
    pH, water, unfiltered, field, standard units  2009-01-22  2025-11-03  18145 
    Dissolved organic matter fluorescence (fDOM), water, in situ, concentration estimated from reference material, micrograms per liter as quinine sulfate equivalents (QSE)  2022-11-04  2025-11-03  3238 
    Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)  2024-08-22  2025-11-03  1304 
    Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)  2024-08-22  2025-11-03  1304 
    Chlorophyll, total, water, fluorometric, 650-700 nanometers, in situ sensor, micrograms per liter  2009-01-22  2024-08-20  4873 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2009-01-22  2025-11-03  18141 
    Discharge, tidally filtered, cubic feet per second  2006-09-30  2025-10-31  6603 
 Daily Statistics 
    Temperature, water, degrees Celsius  2001-11-02  2024-02-12 6887 
    Discharge, cubic feet per second  1972-10-01  2025-01-13 19098 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1975-12-02  2024-02-12 8379 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2009-01-22  2024-02-12 5443 
    Chlorophyll, total, water, fluorometric, 650-700 nanometers, in situ sensor, micrograms per liter  2009-01-22  2011-09-29 971 
    Discharge, tidally filtered, cubic feet per second  2006-09-30  2025-01-13 5924 
 Monthly Statistics 
    Temperature, water, degrees Celsius  2001-11  2024-02  
    Discharge, cubic feet per second  1972-10  2025-01  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1975-12  2024-02  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2009-01  2024-02  
    Chlorophyll, total, water, fluorometric, 650-700 nanometers, in situ sensor, micrograms per liter  2009-01  2011-09  
    Discharge, tidally filtered, cubic feet per second  2006-09  2025-01  
 Annual Statistics 
    Temperature, water, degrees Celsius  2002  2024  
    Discharge, cubic feet per second  1973  2025  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1976  2024  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2009  2024  
    Chlorophyll, total, water, fluorometric, 650-700 nanometers, in situ sensor, micrograms per liter  2009  2011  
    Discharge, tidally filtered, cubic feet per second  2006  2025  
 Peak streamflow 1894-06-07  2024-01-28  54 
 Field measurements 1987-11-20  2025-08-05  251 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 1974-10-25  2024-02-12  941 
 Water-Year Summary 2006  2024  19 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS Oregon Water Science Center
Email questions about this site to Oregon Water Science Center Water-Data Inquiries