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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 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 >  NWIS >  USGS-MA >  USGS-01097050

ASSABET RIVER AT MAIN ST NEAR CONCORD, MA (USGS-01097050) site data in the Water Quality Portal

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

This stream site, maintained by the USGS Massachusetts Water Science Center (identifier USGS-MA), has the name "ASSABET RIVER AT MAIN ST NEAR CONCORD, MA" and has the identifier USGS-01097050. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)01070005. See more details of this site the the USGS NWIS Web page for this site.

This site is located in Middlesex County County, Massachusetts at 42.45648267000000 degrees latitude and -71.3900608000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is Unknown Unknown. The source map scale is 1:24000. This site is at an elevation of 117 feet and the accuracy of the elevation measurement, collected using the method "Interpolated from Digital Elevation Model" is 4.3 feet. The vertical coordinate reference system is NAVD88.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-01097050" 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, Cyanobacteria 2021 - 2023
Biological, Algae, Phytoplankton, Photosynthetic Pigments 2021 - 2023
Information 2020 - 2024
Inorganics, Major, Metals 2021 - 2023
Inorganics, Major, Non-metals 2020 - 2024
Inorganics, Minor, Metals 2021 - 2023
Inorganics, Minor, Non-metals 2021 - 2023
Microbiological 2021 - 2024
Nutrient 2021 - 2023
Organics, Other 2020 - 2023
Organics, PFAS 2020 - 2020
PFAS,Perfluorinated Alkyl Substance 2020 - 2020
PFOA, Perfluorooctanoic Acid 2020 - 2020
Physical 2020 - 2024
Radiochemical 2022 - 2022
*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 USGS-MA
OrganizationFormalName USGS Massachusetts Water Science Center
MonitoringLocationIdentifier USGS-01097050
MonitoringLocationName ASSABET RIVER AT MAIN ST NEAR CONCORD, MA
MonitoringLocationTypeName Stream
HUCEightDigitCode 01070005
LatitudeMeasure 42.45648267000000
LongitudeMeasure -71.3900608000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue Unknown
HorizontalAccuracyMeasure/MeasureUnitCode Unknown
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 117
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue 4.3
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Interpolated from Digital Elevation Model
VerticalCoordinateReferenceSystemDatumName NAVD88
CountryCode US
StateCode 25
CountyCode 017
ProviderName NWIS