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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)    2007-10-01  2017-06-26  
 Daily Data
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07-13  2017-06-25  11786 
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07-13  2017-06-25  11923 
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10-01  2017-06-25  30360 
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11-23  2017-06-14  3480 
    Discharge, cubic feet per second  1930-03-01  2017-06-25  31894 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-10-01  2017-06-25  22262 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- From multiparameter sonde  2013-11-23  2017-06-14  3480 
    Dissolved oxygen, water, unfiltered, milligrams per liter -- From multiparameter sonde  2013-11-23  2017-06-14  3483 
    pH, water, unfiltered, field, standard units -- From multiparameter sonde  2013-11-23  2017-06-14  3438 
    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  2017-06-14  3501 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2011-12-03  2017-06-25  5391 
 Daily Statistics 
    Temperature, water, degrees Celsius -- 4.1 ft from riverbed (middle)  2006-07-13  2016-10-05 3665 
    Temperature, water, degrees Celsius -- 1.0 ft from riverbed (bottom)  2006-07-13  2016-10-05 3711 
    Temperature, water, degrees Celsius -- 7.1 ft from riverbed (top)  1988-10-01  2016-10-05 9852 
    Temperature, water, degrees Celsius -- From multiparameter sonde  2013-11-23  2016-09-15 909 
    Discharge, cubic feet per second  1930-03-01  2017-04-03 31811 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1992-10-01  2016-10-05 7156 
    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  2016-05-19 1427 
 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  1992-10  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  1993  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  2017-05-17  365 
 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