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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 >  EVR >  EVR-RG_GRASMERE

Lake Koocanusa west of Grasmere (EVR-RG_GRASMERE) site data in the Water Quality Portal

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

This reservoir site, maintained by the EVR Operations Limited (identifier EVR), has the name "Lake Koocanusa west of Grasmere" and has the identifier EVR-RG_GRASMERE. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)17010101.

This site is located at 49.1149000000 degrees latitude and -115.2278000000 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 "EVR-RG_GRASMERE" 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 2019 - 2025
Information 2019 - 2025
Inorganics, Major, Metals 2019 - 2025
Inorganics, Major, Non-metals 2019 - 2025
Inorganics, Minor, Metals 2019 - 2025
Inorganics, Minor, Non-metals 2019 - 2025
Nutrient 2019 - 2025
Organics, Other 2019 - 2025
Physical 2019 - 2025
Radiochemical 2019 - 2025
*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 EVR
OrganizationFormalName EVR Operations Limited
MonitoringLocationIdentifier EVR-RG_GRASMERE
MonitoringLocationName Lake Koocanusa west of Grasmere
MonitoringLocationTypeName Reservoir
HUCEightDigitCode 17010101
LatitudeMeasure 49.1149000000
LongitudeMeasure -115.2278000000
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode CA
StateCode 02
ProviderName STORET