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Water Quality Samples for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.

USGS 12300110 Lake Koocanusa at international boundary

Lincoln County, Montana
Hydrologic Unit Code 17010101
Latitude  48°59'22.67", Longitude 115°10'51.49" NAD83
Gage datum 2,463 feet above NAVD88
Output formats
Parameter Group Period of Record table
Inventory of available water-quality data for printing
Inventory of water-quality data with retrieval
Tab-separated data, one result per row
Tab-separated data one sample per row with remark codes combined with values
Tab-separated data one sample per row with tab-delimiter for remark codes
Reselect output format
Parameter Group Summary of Available Data
Parameter Group First
Date		 Last
Date		 Number of
Samples		 Number of
Values
All -- include all parameter groups 1972-06-14 2023-11-02 4329 52061
Information 1972-06-14 2023-11-02 4327 11768
Physical 1972-06-14 2023-11-02 4307 17875
Inorganics, Major, Metals 1974-06-12 2023-11-02 191 1149
Inorganics, Major, Non-metals 1972-06-14 2023-11-02 3940 10093
Nutrient 1972-06-14 2023-07-25 620 6687
Microbiological 1972-06-28 1980-10-01 24 24
Biological 1974-05-24 2023-11-02 268 537
Inorganics, Minor, Metals 1972-06-28 2023-11-02 156 2185
Inorganics, Minor, Non-metals 1972-06-28 2023-11-02 574 990
Organics, pesticide 1972-07-27 1974-05-24 14 174
Organics, PCBs 1972-10-19 1974-05-24 12 12
Organics, other 1974-06-12 2023-11-02 427 452
Radiochemical 1972-07-27 2023-09-25 21 108
Sediment 1999-10-14 1999-10-14 1 2
Population/Community 1980-10-01 1980-10-01 1 5