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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 user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  11NPSWRD_WQX >  11NPSWRD_WQX-MIMA_L1_1

Concord River at Old North Bridge (11NPSWRD_WQX-MIMA_L1_1) 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 National Park Service Water Resources Division (identifier 11NPSWRD_WQX), has the name "Concord River at Old North Bridge" and has the identifier 11NPSWRD_WQX-MIMA_L1_1. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)01070005.

This site is located in Middlesex County County, Massachusetts at 42.4691400000 degrees latitude and -71.3505100000 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 "11NPSWRD_WQX-MIMA_L1_1" 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*
Biological, Algae, Phytoplankton 1999 - 1999
Information 1998 - 1999
Nutrient 1998 - 1999
Physical 1998 - 1999
*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 11NPSWRD_WQX
OrganizationFormalName National Park Service Water Resources Division
MonitoringLocationIdentifier 11NPSWRD_WQX-MIMA_L1_1
MonitoringLocationName Concord River at Old North Bridge
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText Station is located in the North Bridge Unit of Minute Man NHP on the Concord River. Immediately upstream of the park, the Concord River is formed at the confluence of the Sudbury and Assabet Rivers. USGS gauging stations are located on the Sudbury River, several kilometers upstream of the North Bridge before its confluence with the Assabet/Concord, and many kilometers downstream on the Concord River in Lowell (near its discharge to the Merrimack River). Land use within the Sudbury, Assabet, and upper Concord River watersheds is highly residential/suburban.
HUCEightDigitCode 01070005
LatitudeMeasure 42.4691400000
LongitudeMeasure -71.3505100000
SourceMapScaleNumeric 0
HorizontalCollectionMethodName GPS Code (Pseudo Range) Standard Position (SA Off)
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 25
CountyCode 017
ProviderName STORET