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USGS 01646500 POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA

  Stream Site

DESCRIPTION:
Latitude 38°56'59.2",   Longitude 77°07'39.5"   NAD83
Montgomery County, Maryland, Hydrologic Unit 02070008
Drainage area: 11,560 square miles
Datum of gage: 37.20 feet above   NAVD88.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1972-06-09  2017-08-22  
 Daily Data
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07-13  2017-08-21  11957 
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07-13  2017-08-21  12094 
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10-01  2017-08-21  30531 
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11-23  2017-08-21  3606 
    Discharge, cubic feet per second  1930-03-01  2017-08-21  31951 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-09-30  2017-08-21  22433 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11-23  2017-08-21  3606 
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11-23  2017-08-21  3609 
    pH, water, unfiltered, field, standard units -- From multiparameter sonde  2013-11-23  2017-08-21  3564 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2013-11-23  2017-08-21  3627 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12-03  2017-08-21  5526 
 Daily Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07-13  2016-10-04 3664 
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07-13  2016-10-04 3710 
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10-01  2016-10-04 9851 
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11-23  2016-09-15 909 
    Discharge, cubic feet per second  1930-03-01  2017-04-02 31810 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-09-30  2016-10-04 7155 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11-23  2016-09-15 909 
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11-23  2016-09-22 910 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2013-11-23  2016-09-22 916 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12-03  2016-05-18 1426 
 Monthly Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07  2016-10  
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07  2016-10  
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10  2016-10  
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11  2016-09  
    Discharge, cubic feet per second  1930-03  2017-04  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-09  2016-10  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11  2016-09  
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11  2016-09  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2013-11  2016-09  
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12  2016-05  
 Annual Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006  2017  
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006  2017  
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1989  2017  
    Temperature, water, degrees Celsius -- From multiparameter sonde  2014  2016  
    Discharge, cubic feet per second  1930  2017  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992  2017  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2014  2016  
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2014  2016  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- From multiparameter sonde  2014  2016  
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2012  2016  
 Peak streamflow 1931-04-03  2016-02-05  86 
 Field measurements 1930-03-25  2017-08-02  366 
 Field/Lab water-quality samples 1965-08-09  2015-11-04  40 
 Water-Year Summary 2006  2016  11 

Additional Data Sources

Begin Date

End Date

Count
 Instantaneous-Data Archive  **offsite** 1972-06-09  2007-09-30  559179 
OPERATION:
Record for this site is maintained by the USGS Maryland Water Science Center
Email questions about this site to Maryland Water Science Center Water-Data Inquiries