Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here.

This legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  WWMD_VA >  WWMD_VA-MRC

WQXTEST 16465 POTOMAC RIVER NEAR WASHINGTON, DC LITTLE FALLS PUMP STA (WWMD_VA-MRC) site data in the Water Quality Portal

Data Provider: STORET (Learn more about Water Quality Portal Data Providers)

This river/stream site, maintained by the WQX Test Organization (identifier WWMD_VA), has the name "WQXTEST 16465 POTOMAC RIVER NEAR WASHINGTON, DC LITTLE FALLS PUMP STA" and has the identifier WWMD_VA-MRC. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)02070008.

This site is located in Montgomery County County, Maryland at 38.9497800000 degrees latitude and -77.1276400000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "WWMD_VA-MRC" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Inorganics, Major, Non-metals 2015 - 2015
Organics, Other 2015 - 2015
Physical 2015 - 2015
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier WWMD_VA
OrganizationFormalName WQX Test Organization
MonitoringLocationIdentifier WWMD_VA-MRC
MonitoringLocationName WQXTEST 16465 POTOMAC RIVER NEAR WASHINGTON, DC LITTLE FALLS PUMP STA
MonitoringLocationTypeName River/Stream
HUCEightDigitCode 02070008
LatitudeMeasure 38.9497800000
LongitudeMeasure -77.1276400000
SourceMapScaleNumeric 2400
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 24
CountyCode 031
ProviderName STORET