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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-MT >  USGS-12355000

Flathead River at Flathead British Columbia (USGS-12355000) 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 Montana Water Science Center (identifier USGS-MT), has the name "Flathead River at Flathead British Columbia" and has the identifier USGS-12355000. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)17010206. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 429 sq mi.

This site is located at 49.00124167000000 degrees latitude and -114.4756639000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from Digital MAP." and the accuracy is .1 seconds. This site is at an elevation of 3968.16 feet and the accuracy of the elevation measurement, collected using the method "Level or other surveyed method." is .01 feet. The vertical coordinate reference system is NGVD29.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-12355000" 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 2007 - 2008
Biological, Algae, Phytoplankton 1974 - 1981
Biological, Algae, Phytoplankton, Cyanobacteria, Periphyton 1974 - 1980
Biological, Algae, Phytoplankton, Photosynthetic Pigments 1974 - 2008
Biological, Counts 1974 - 1981
Biological, Photosynthetic Pigments 1974 - 1980
Information 1970 - 2017
Inorganics, Major, Metals 1965 - 2011
Inorganics, Major, Non-metals 1965 - 2017
Inorganics, Minor, Metals 1965 - 2017
Inorganics, Minor, Non-metals 1965 - 2017
Microbiological 1970 - 1993
Nutrient 1965 - 2017
Organics, Other 1970 - 2017
Organics, Pesticide 1970 - 1970
Physical 1965 - 2017
Radiochemical 1980 - 1981
Sediment 1974 - 2017
*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-MT
OrganizationFormalName USGS Montana Water Science Center
MonitoringLocationIdentifier USGS-12355000
MonitoringLocationName Flathead River at Flathead British Columbia
MonitoringLocationTypeName Stream
HUCEightDigitCode 17010206
DrainageAreaMeasure/MeasureValue 429
DrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 49.00124167000000
LongitudeMeasure -114.4756639000000
HorizontalAccuracyMeasure/MeasureValue .1
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from Digital MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 3968.16
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .01
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Level or other surveyed method.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode CA
StateCode 96
CountyCode 000
ProviderName NWIS