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 >  MDEQ_WQ_WQX >  MDEQ_WQ_WQX-K01KOOCL39

Lake Koocanusa at south point of Tobacco River drainage (MDEQ_WQ_WQX-K01KOOCL39) site data in the Water Quality Portal

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

This lake site, maintained by the Montana DEQ WQPB (identifier MDEQ_WQ_WQX), has the name "Lake Koocanusa at south point of Tobacco River drainage" and has the identifier MDEQ_WQ_WQX-K01KOOCL39. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)17010101.

This site is located in Lincoln County County, Montana at 48.9049540000 degrees latitude and -115.1797750000 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 "MDEQ_WQ_WQX-K01KOOCL39" 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 2018 - 2018
Biological, Fish 2016 - 2018
Inorganics, Minor, Metals 2016 - 2016
Inorganics, Minor, Non-metals 2016 - 2018
Organics, Other 2016 - 2018
Physical 2016 - 2018
*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 MDEQ_WQ_WQX
OrganizationFormalName Montana DEQ WQPB
MonitoringLocationIdentifier MDEQ_WQ_WQX-K01KOOCL39
MonitoringLocationName Lake Koocanusa at south point of Tobacco River drainage
MonitoringLocationTypeName Lake
MonitoringLocationDescriptionText Lake Koocanusa at south point of Tobacco River drainage, near Rexford
HUCEightDigitCode 17010101
LatitudeMeasure 48.9049540000
LongitudeMeasure -115.1797750000
HorizontalCollectionMethodName GPS Code (Pseudo Range) Standard Position (SA Off)
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 30
CountyCode 053
ProviderName STORET